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1279399 commits

Author SHA1 Message Date
Dev Jain
fb9293b6b0 selftests/mm: compaction_test: fix bogus test success and reduce probability of OOM-killer invocation
Reset nr_hugepages to zero before the start of the test.

If a non-zero number of hugepages is already set before the start of the
test, the following problems arise:

 - The probability of the test getting OOM-killed increases.  Proof:
   The test wants to run on 80% of available memory to prevent OOM-killing
   (see original code comments).  Let the value of mem_free at the start
   of the test, when nr_hugepages = 0, be x.  In the other case, when
   nr_hugepages > 0, let the memory consumed by hugepages be y.  In the
   former case, the test operates on 0.8 * x of memory.  In the latter,
   the test operates on 0.8 * (x - y) of memory, with y already filled,
   hence, memory consumed is y + 0.8 * (x - y) = 0.8 * x + 0.2 * y > 0.8 *
   x.  Q.E.D

 - The probability of a bogus test success increases.  Proof: Let the
   memory consumed by hugepages be greater than 25% of x, with x and y
   defined as above.  The definition of compaction_index is c_index = (x -
   y)/z where z is the memory consumed by hugepages after trying to
   increase them again.  In check_compaction(), we set the number of
   hugepages to zero, and then increase them back; the probability that
   they will be set back to consume at least y amount of memory again is
   very high (since there is not much delay between the two attempts of
   changing nr_hugepages).  Hence, z >= y > (x/4) (by the 25% assumption).
   Therefore, c_index = (x - y)/z <= (x - y)/y = x/y - 1 < 4 - 1 = 3
   hence, c_index can always be forced to be less than 3, thereby the test
   succeeding always.  Q.E.D

Link: https://lkml.kernel.org/r/20240521074358.675031-4-dev.jain@arm.com
Fixes: bd67d5c15c ("Test compaction of mlocked memory")
Signed-off-by: Dev Jain <dev.jain@arm.com>
Cc: <stable@vger.kernel.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sri Jayaramappa <sjayaram@akamai.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-24 11:55:06 -07:00
Dev Jain
9ad665ef55 selftests/mm: compaction_test: fix incorrect write of zero to nr_hugepages
Currently, the test tries to set nr_hugepages to zero, but that is not
actually done because the file offset is not reset after read().  Fix that
using lseek().

Link: https://lkml.kernel.org/r/20240521074358.675031-3-dev.jain@arm.com
Fixes: bd67d5c15c ("Test compaction of mlocked memory")
Signed-off-by: Dev Jain <dev.jain@arm.com>
Cc: <stable@vger.kernel.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sri Jayaramappa <sjayaram@akamai.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-24 11:55:06 -07:00
Dev Jain
d4202e66a4 selftests/mm: compaction_test: fix bogus test success on Aarch64
Patch series "Fixes for compaction_test", v2.

The compaction_test memory selftest introduces fragmentation in memory
and then tries to allocate as many hugepages as possible. This series
addresses some problems.

On Aarch64, if nr_hugepages == 0, then the test trivially succeeds since
compaction_index becomes 0, which is less than 3, due to no division by
zero exception being raised. We fix that by checking for division by
zero.

Secondly, correctly set the number of hugepages to zero before trying
to set a large number of them.

Now, consider a situation in which, at the start of the test, a non-zero
number of hugepages have been already set (while running the entire
selftests/mm suite, or manually by the admin). The test operates on 80%
of memory to avoid OOM-killer invocation, and because some memory is
already blocked by hugepages, it would increase the chance of OOM-killing.
Also, since mem_free used in check_compaction() is the value before we
set nr_hugepages to zero, the chance that the compaction_index will
be small is very high if the preset nr_hugepages was high, leading to a
bogus test success.


This patch (of 3):

Currently, if at runtime we are not able to allocate a huge page, the test
will trivially pass on Aarch64 due to no exception being raised on
division by zero while computing compaction_index.  Fix that by checking
for nr_hugepages == 0.  Anyways, in general, avoid a division by zero by
exiting the program beforehand.  While at it, fix a typo, and handle the
case where the number of hugepages may overflow an integer.

Link: https://lkml.kernel.org/r/20240521074358.675031-1-dev.jain@arm.com
Link: https://lkml.kernel.org/r/20240521074358.675031-2-dev.jain@arm.com
Fixes: bd67d5c15c ("Test compaction of mlocked memory")
Signed-off-by: Dev Jain <dev.jain@arm.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Sri Jayaramappa <sjayaram@akamai.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-24 11:55:05 -07:00
Satya Priya Kakitapalli
c17d39f565 mailmap: update email address for Satya Priya
Update mailmap with my latest email ID, quic_c_skakit@quicinc.com
is no longer active.

Link: https://lkml.kernel.org/r/20240515-mailmap-update-v1-1-df4853f757a3@quicinc.com
Signed-off-by: Satya Priya Kakitapalli <quic_skakitap@quicinc.com>
Cc: Ajit Pandey <quic_ajipan@quicinc.com>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Imran Shaik <quic_imrashai@quicinc.com>
Cc: Jagadeesh Kona <quic_jkona@quicinc.com>
Cc: Konrad Dybcio <konrad.dybcio@linaro.org>
Cc: Taniya Das <quic_tdas@quicinc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-24 11:55:05 -07:00
Miaohe Lin
fe6f86f4b4 mm/huge_memory: don't unpoison huge_zero_folio
When I did memory failure tests recently, below panic occurs:

 kernel BUG at include/linux/mm.h:1135!
 invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
 CPU: 9 PID: 137 Comm: kswapd1 Not tainted 6.9.0-rc4-00491-gd5ce28f156fe-dirty #14
 RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0
 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246
 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8
 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0
 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492
 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000
 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00
 FS:  0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0
 Call Trace:
  <TASK>
  do_shrink_slab+0x14f/0x6a0
  shrink_slab+0xca/0x8c0
  shrink_node+0x2d0/0x7d0
  balance_pgdat+0x33a/0x720
  kswapd+0x1f3/0x410
  kthread+0xd5/0x100
  ret_from_fork+0x2f/0x50
  ret_from_fork_asm+0x1a/0x30
  </TASK>
 Modules linked in: mce_inject hwpoison_inject
 ---[ end trace 0000000000000000 ]---
 RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0
 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246
 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8
 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0
 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492
 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000
 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00
 FS:  0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0

The root cause is that HWPoison flag will be set for huge_zero_folio
without increasing the folio refcnt.  But then unpoison_memory() will
decrease the folio refcnt unexpectedly as it appears like a successfully
hwpoisoned folio leading to VM_BUG_ON_PAGE(page_ref_count(page) == 0) when
releasing huge_zero_folio.

Skip unpoisoning huge_zero_folio in unpoison_memory() to fix this issue. 
We're not prepared to unpoison huge_zero_folio yet.

Link: https://lkml.kernel.org/r/20240516122608.22610-1-linmiaohe@huawei.com
Fixes: 478d134e95 ("mm/huge_memory: do not overkill when splitting huge_zero_page")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Xu Yu <xuyu@linux.alibaba.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-24 11:55:05 -07:00
Andrey Konovalov
2e577732e8 kasan, fortify: properly rename memintrinsics
After commit 69d4c0d321 ("entry, kasan, x86: Disallow overriding mem*()
functions") and the follow-up fixes, with CONFIG_FORTIFY_SOURCE enabled,
even though the compiler instruments meminstrinsics by generating calls to
__asan/__hwasan_ prefixed functions, FORTIFY_SOURCE still uses
uninstrumented memset/memmove/memcpy as the underlying functions.

As a result, KASAN cannot detect bad accesses in memset/memmove/memcpy. 
This also makes KASAN tests corrupt kernel memory and cause crashes.

To fix this, use __asan_/__hwasan_memset/memmove/memcpy as the underlying
functions whenever appropriate.  Do this only for the instrumented code
(as indicated by __SANITIZE_ADDRESS__).

Link: https://lkml.kernel.org/r/20240517130118.759301-1-andrey.konovalov@linux.dev
Fixes: 69d4c0d321 ("entry, kasan, x86: Disallow overriding mem*() functions")
Fixes: 51287dcb00 ("kasan: emit different calls for instrumentable memintrinsics")
Fixes: 36be5cba99 ("kasan: treat meminstrinsic as builtins in uninstrumented files")
Signed-off-by: Andrey Konovalov <andreyknvl@gmail.com>
Reported-by: Erhard Furtner <erhard_f@mailbox.org>
Reported-by: Nico Pache <npache@redhat.com>
Closes: https://lore.kernel.org/all/20240501144156.17e65021@outsider.home/
Reviewed-by: Marco Elver <elver@google.com>
Tested-by: Nico Pache <npache@redhat.com>
Acked-by: Nico Pache <npache@redhat.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Daniel Axtens <dja@axtens.net>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-24 11:55:05 -07:00
Suren Baghdasaryan
a38568a0b4 lib: add version into /proc/allocinfo output
Add version string and a header at the beginning of /proc/allocinfo to
allow later format changes.  Example output:

> head /proc/allocinfo
allocinfo - version: 1.0
#     <size>  <calls> <tag info>
           0        0 init/main.c:1314 func:do_initcalls
           0        0 init/do_mounts.c:353 func:mount_nodev_root
           0        0 init/do_mounts.c:187 func:mount_root_generic
           0        0 init/do_mounts.c:158 func:do_mount_root
           0        0 init/initramfs.c:493 func:unpack_to_rootfs
           0        0 init/initramfs.c:492 func:unpack_to_rootfs
           0        0 init/initramfs.c:491 func:unpack_to_rootfs
         512        1 arch/x86/events/rapl.c:681 func:init_rapl_pmus
         128        1 arch/x86/events/rapl.c:571 func:rapl_cpu_online

[akpm@linux-foundation.org: remove stray newline from struct allocinfo_private]
Link: https://lkml.kernel.org/r/20240514163128.3662251-1-surenb@google.com
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-24 11:55:05 -07:00
Hailong.Liu
8e0545c83d mm/vmalloc: fix vmalloc which may return null if called with __GFP_NOFAIL
commit a421ef3030 ("mm: allow !GFP_KERNEL allocations for kvmalloc")
includes support for __GFP_NOFAIL, but it presents a conflict with commit
dd544141b9 ("vmalloc: back off when the current task is OOM-killed").  A
possible scenario is as follows:

process-a
__vmalloc_node_range(GFP_KERNEL | __GFP_NOFAIL)
    __vmalloc_area_node()
        vm_area_alloc_pages()
		--> oom-killer send SIGKILL to process-a
        if (fatal_signal_pending(current)) break;
--> return NULL;

To fix this, do not check fatal_signal_pending() in vm_area_alloc_pages()
if __GFP_NOFAIL set.

This issue occurred during OPLUS KASAN TEST. Below is part of the log
-> oom-killer sends signal to process
[65731.222840] [ T1308] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/apps/uid_10198,task=gs.intelligence,pid=32454,uid=10198

[65731.259685] [T32454] Call trace:
[65731.259698] [T32454]  dump_backtrace+0xf4/0x118
[65731.259734] [T32454]  show_stack+0x18/0x24
[65731.259756] [T32454]  dump_stack_lvl+0x60/0x7c
[65731.259781] [T32454]  dump_stack+0x18/0x38
[65731.259800] [T32454]  mrdump_common_die+0x250/0x39c [mrdump]
[65731.259936] [T32454]  ipanic_die+0x20/0x34 [mrdump]
[65731.260019] [T32454]  atomic_notifier_call_chain+0xb4/0xfc
[65731.260047] [T32454]  notify_die+0x114/0x198
[65731.260073] [T32454]  die+0xf4/0x5b4
[65731.260098] [T32454]  die_kernel_fault+0x80/0x98
[65731.260124] [T32454]  __do_kernel_fault+0x160/0x2a8
[65731.260146] [T32454]  do_bad_area+0x68/0x148
[65731.260174] [T32454]  do_mem_abort+0x151c/0x1b34
[65731.260204] [T32454]  el1_abort+0x3c/0x5c
[65731.260227] [T32454]  el1h_64_sync_handler+0x54/0x90
[65731.260248] [T32454]  el1h_64_sync+0x68/0x6c

[65731.260269] [T32454]  z_erofs_decompress_queue+0x7f0/0x2258
--> be->decompressed_pages = kvcalloc(be->nr_pages, sizeof(struct page *), GFP_KERNEL | __GFP_NOFAIL);
	kernel panic by NULL pointer dereference.
	erofs assume kvmalloc with __GFP_NOFAIL never return NULL.
[65731.260293] [T32454]  z_erofs_runqueue+0xf30/0x104c
[65731.260314] [T32454]  z_erofs_readahead+0x4f0/0x968
[65731.260339] [T32454]  read_pages+0x170/0xadc
[65731.260364] [T32454]  page_cache_ra_unbounded+0x874/0xf30
[65731.260388] [T32454]  page_cache_ra_order+0x24c/0x714
[65731.260411] [T32454]  filemap_fault+0xbf0/0x1a74
[65731.260437] [T32454]  __do_fault+0xd0/0x33c
[65731.260462] [T32454]  handle_mm_fault+0xf74/0x3fe0
[65731.260486] [T32454]  do_mem_abort+0x54c/0x1b34
[65731.260509] [T32454]  el0_da+0x44/0x94
[65731.260531] [T32454]  el0t_64_sync_handler+0x98/0xb4
[65731.260553] [T32454]  el0t_64_sync+0x198/0x19c

Link: https://lkml.kernel.org/r/20240510100131.1865-1-hailong.liu@oppo.com
Fixes: 9376130c39 ("mm/vmalloc: add support for __GFP_NOFAIL")
Signed-off-by: Hailong.Liu <hailong.liu@oppo.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Suggested-by: Barry Song <21cnbao@gmail.com>
Reported-by: Oven <liyangouwen1@oppo.com>
Reviewed-by: Barry Song <baohua@kernel.org>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Chao Yu <chao@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Gao Xiang <xiang@kernel.org>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-24 11:55:04 -07:00
Linus Torvalds
f1f9984fdc RISC-V Patches for the 6.10 Merge Window, Part 2
* The compression format used for boot images is now configurable at
   build time, and these formats are shown in `make help`.
 * access_ok() has been optimized.
 * A pair of performance bugs have been fixed in the uaccess handlers.
 * Various fixes and cleanups, including one for the IMSIC build failure
   and one for the early-boot ftrace illegal NOPs bug.
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Merge tag 'riscv-for-linus-6.10-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Pull more RISC-V updates from Palmer Dabbelt:

 - The compression format used for boot images is now configurable at
   build time, and these formats are shown in `make help`

 - access_ok() has been optimized

 - A pair of performance bugs have been fixed in the uaccess handlers

 - Various fixes and cleanups, including one for the IMSIC build failure
   and one for the early-boot ftrace illegal NOPs bug

* tag 'riscv-for-linus-6.10-mw2' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Fix early ftrace nop patching
  irqchip: riscv-imsic: Fixup riscv_ipi_set_virq_range() conflict
  riscv: selftests: Add signal handling vector tests
  riscv: mm: accelerate pagefault when badaccess
  riscv: uaccess: Relax the threshold for fast path
  riscv: uaccess: Allow the last potential unrolled copy
  riscv: typo in comment for get_f64_reg
  Use bool value in set_cpu_online()
  riscv: selftests: Add hwprobe binaries to .gitignore
  riscv: stacktrace: fixed walk_stackframe()
  ftrace: riscv: move from REGS to ARGS
  riscv: do not select MODULE_SECTIONS by default
  riscv: show help string for riscv-specific targets
  riscv: make image compression configurable
  riscv: cpufeature: Fix extension subset checking
  riscv: cpufeature: Fix thead vector hwcap removal
  riscv: rewrite __kernel_map_pages() to fix sleeping in invalid context
  riscv: force PAGE_SIZE linear mapping if debug_pagealloc is enabled
  riscv: Define TASK_SIZE_MAX for __access_ok()
  riscv: Remove PGDIR_SIZE_L3 and TASK_SIZE_MIN
2024-05-24 10:46:35 -07:00
Linus Torvalds
9351f138d1 xen: branch for v6.10-rc1
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Merge tag 'for-linus-6.10a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - a small cleanup in the drivers/xen/xenbus Makefile

 - a fix of the Xen xenstore driver to improve connecting to a late
   started Xenstore

 - an enhancement for better support of ballooning in PVH guests

 - a cleanup using try_cmpxchg() instead of open coding it

* tag 'for-linus-6.10a-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  drivers/xen: Improve the late XenStore init protocol
  xen/xenbus: Use *-y instead of *-objs in Makefile
  xen/x86: add extra pages to unpopulated-alloc if available
  locking/x86/xen: Use try_cmpxchg() in xen_alloc_p2m_entry()
2024-05-24 10:24:49 -07:00
Linus Torvalds
02c438bbff for-6.10-tag
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Merge tag 'for-6.10-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull more btrfs updates from David Sterba:
 "A few more updates, mostly stability fixes or user visible changes:

   - fix race in zoned mode during device replace that can lead to
     use-after-free

   - update return codes and lower message levels for quota rescan where
     it's causing false alerts

   - fix unexpected qgroup id reuse under some conditions

   - fix condition when looking up extent refs

   - add option norecovery (removed in 6.8), the intended replacements
     haven't been used and some aplications still rely on the old one

   - build warning fixes"

* tag 'for-6.10-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: re-introduce 'norecovery' mount option
  btrfs: fix end of tree detection when searching for data extent ref
  btrfs: scrub: initialize ret in scrub_simple_mirror() to fix compilation warning
  btrfs: zoned: fix use-after-free due to race with dev replace
  btrfs: qgroup: fix qgroup id collision across mounts
  btrfs: qgroup: update rescan message levels and error codes
2024-05-24 09:40:31 -07:00
Linus Torvalds
dcb9f48667 Changes since last update:
- Convert metadata APIs to byte offsets;
 
  - Avoid allocating DEFLATE streams unnecessarily;
 
  - Some erofs_show_options() cleanup.
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Merge tag 'erofs-for-6.10-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

Pull more erofs updates from Gao Xiang:
 "The main ones are metadata API conversion to byte offsets by Al Viro.

  Another patch gets rid of unnecessary memory allocation out of DEFLATE
  decompressor. The remaining one is a trivial cleanup.

   - Convert metadata APIs to byte offsets

   - Avoid allocating DEFLATE streams unnecessarily

   - Some erofs_show_options() cleanup"

* tag 'erofs-for-6.10-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
  erofs: avoid allocating DEFLATE streams before mounting
  z_erofs_pcluster_begin(): don't bother with rounding position down
  erofs: don't round offset down for erofs_read_metabuf()
  erofs: don't align offset for erofs_read_metabuf() (simple cases)
  erofs: mechanically convert erofs_read_metabuf() to offsets
  erofs: clean up erofs_show_options()
2024-05-24 09:31:50 -07:00
Linus Torvalds
c40b1994b9 bcachefs fixes for 6.10-rc1
Just a few syzbot fixes
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Merge tag 'bcachefs-2024-05-24' of https://evilpiepirate.org/git/bcachefs

Pull bcachefs fixes from Kent Overstreet:
 "Nothing exciting, just syzbot fixes (except for the one
  FMODE_CAN_ODIRECT patch).

  Looks like syzbot reports have slowed down; this is all catch up from
  two weeks of conferences.

  Next hardening project is using Thomas's error injection tooling to
  torture test repair"

* tag 'bcachefs-2024-05-24' of https://evilpiepirate.org/git/bcachefs:
  bcachefs: Fix race path in bch2_inode_insert()
  bcachefs: Ensure we're RW before journalling
  bcachefs: Fix shutdown ordering
  bcachefs: Fix unsafety in bch2_dirent_name_bytes()
  bcachefs: Fix stack oob in __bch2_encrypt_bio()
  bcachefs: Fix btree_trans leak in bch2_readahead()
  bcachefs: Fix bogus verify_replicas_entry() assert
  bcachefs: Check for subvolues with bogus snapshot/inode fields
  bcachefs: bch2_checksum() returns 0 for unknown checksum type
  bcachefs: Fix bch2_alloc_ciphers()
  bcachefs: Add missing guard in bch2_snapshot_has_children()
  bcachefs: Fix missing parens in drop_locks_do()
  bcachefs: Improve bch2_assert_pos_locked()
  bcachefs: Fix shift overflows in replicas.c
  bcachefs: Fix shift overflow in btree_lost_data()
  bcachefs: Fix ref in trans_mark_dev_sbs() error path
  bcachefs: set FMODE_CAN_ODIRECT instead of a dummy direct_IO method
  bcachefs: Fix rcu splat in check_fix_ptrs()
2024-05-24 09:07:22 -07:00
Linus Torvalds
9ea370f341 Input updates for v6.10-rc0
- a change to input core to trim amount of keys data in modalias string
   in case when a device declares too many keys and they do not fit in
   uevent buffer instead of reporting an error which results in uevent
   not being generated at all
 
 - support for Machenike G5 Pro Controller added to xpad driver
 
 - support for FocalTech FT5452 and FT8719 added to edt-ft5x06
 
 - support for new SPMI vibrator added to pm8xxx-vibrator driver
 
 - missing locking added to cyapa touchpad driver
 
 - removal of unused fields in various driver structures
 
 - explicit initialization of i2c_device_id::driver_data to 0 dropped
   from input drivers
 
 - other assorted fixes and cleanups.
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Merge tag 'input-for-v6.10-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull input updates from Dmitry Torokhov:

 - a change to input core to trim amount of keys data in modalias string
   in case when a device declares too many keys and they do not fit in
   uevent buffer instead of reporting an error which results in uevent
   not being generated at all

 - support for Machenike G5 Pro Controller added to xpad driver

 - support for FocalTech FT5452 and FT8719 added to edt-ft5x06

 - support for new SPMI vibrator added to pm8xxx-vibrator driver

 - missing locking added to cyapa touchpad driver

 - removal of unused fields in various driver structures

 - explicit initialization of i2c_device_id::driver_data to 0 dropped
   from input drivers

 - other assorted fixes and cleanups.

* tag 'input-for-v6.10-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (24 commits)
  Input: edt-ft5x06 - add support for FocalTech FT5452 and FT8719
  dt-bindings: input: touchscreen: edt-ft5x06: Document FT5452 and FT8719 support
  Input: xpad - add support for Machenike G5 Pro Controller
  Input: try trimming too long modalias strings
  Input: drop explicit initialization of struct i2c_device_id::driver_data to 0
  Input: zet6223 - remove an unused field in struct zet6223_ts
  Input: chipone_icn8505 - remove an unused field in struct icn8505_data
  Input: cros_ec_keyb - remove an unused field in struct cros_ec_keyb
  Input: lpc32xx-keys - remove an unused field in struct lpc32xx_kscan_drv
  Input: matrix_keypad - remove an unused field in struct matrix_keypad
  Input: tca6416-keypad - remove unused struct tca6416_drv_data
  Input: tca6416-keypad - remove an unused field in struct tca6416_keypad_chip
  Input: da7280 - remove an unused field in struct da7280_haptic
  Input: ff-core - prefer struct_size over open coded arithmetic
  Input: cyapa - add missing input core locking to suspend/resume functions
  input: pm8xxx-vibrator: add new SPMI vibrator support
  dt-bindings: input: qcom,pm8xxx-vib: add new SPMI vibrator module
  input: pm8xxx-vibrator: refactor to support new SPMI vibrator
  Input: pm8xxx-vibrator - correct VIB_MAX_LEVELS calculation
  Input: sur40 - convert le16 to cpu before use
  ...
2024-05-24 09:01:21 -07:00
Linus Torvalds
041c9f71a4 sound fixes for 6.10-rc1
A collection of small fixes for 6.10-rc1.  Most of changes are
 various device-specific fixes and quirks, while there are a few small
 changes in ALSA core timer and module / built-in fixes.
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Merge tag 'sound-fix-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A collection of small fixes for 6.10-rc1. Most of changes are various
  device-specific fixes and quirks, while there are a few small changes
  in ALSA core timer and module / built-in fixes"

* tag 'sound-fix-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek: fix mute/micmute LEDs don't work for ProBook 440/460 G11.
  ALSA: core: Enable proc module when CONFIG_MODULES=y
  ALSA: core: Fix NULL module pointer assignment at card init
  ALSA: hda/realtek: Enable headset mic of JP-IK LEAP W502 with ALC897
  ASoC: dt-bindings: stm32: Ensure compatible pattern matches whole string
  ASoC: tas2781: Fix wrong loading calibrated data sequence
  ASoC: tas2552: Add TX path for capturing AUDIO-OUT data
  ALSA: usb-audio: Fix for sampling rates support for Mbox3
  Documentation: sound: Fix trailing whitespaces
  ALSA: timer: Set lower bound of start tick time
  ASoC: codecs: ES8326: solve hp and button detect issue
  ASoC: rt5645: mic-in detection threshold modification
  ASoC: Intel: sof_sdw_rt_sdca_jack_common: Use name_prefix for `-sdca` detection
2024-05-24 08:48:51 -07:00
Linus Torvalds
e292ead0c9 Char/Misc bugfix for 6.10-rc1
Here is one remaining bugfix for 6.10-rc1 that missed the 6.9-final
 merge window, and has been sitting in my tree and linux-next for quite a
 while now, but wasn't sent to you (my fault, travels...)
 
 It is a bugfix to resolve an error in the speakup code that could
 overflow a buffer.
 
 It has been in linux-next for a while with no reported problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.10-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc fix from Greg KH:
 "Here is one remaining bugfix for 6.10-rc1 that missed the 6.9-final
  merge window, and has been sitting in my tree and linux-next for quite
  a while now, but wasn't sent to you (my fault, travels...)

  It is a bugfix to resolve an error in the speakup code that could
  overflow a buffer.

  It has been in linux-next for a while with no reported problems"

* tag 'char-misc-6.10-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  speakup: Fix sizeof() vs ARRAY_SIZE() bug
2024-05-24 08:43:25 -07:00
Linus Torvalds
f6d199c774 TTY/Serial fixes for 6.10-rc1
Here are some small TTY and Serial driver fixes that missed the
 6.9-final merge window, but have been in my tree for weeks (my fault,
 travel caused me to miss this.)
 
 These fixes include:
   - more n_gsm fixes for reported problems
   - 8520_mtk driver fix
   - 8250_bcm7271 driver fix
   - sc16is7xx driver fix
 
 All of these have been in linux-next for weeks without any reported
 problems.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fixes from Greg KH:
 "Here are some small TTY and Serial driver fixes that missed the
  6.9-final merge window, but have been in my tree for weeks (my fault,
  travel caused me to miss this)

  These fixes include:

   - more n_gsm fixes for reported problems

   - 8520_mtk driver fix

   - 8250_bcm7271 driver fix

   - sc16is7xx driver fix

  All of these have been in linux-next for weeks without any reported
  problems"

* tag 'tty-6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  serial: sc16is7xx: fix bug in sc16is7xx_set_baud() when using prescaler
  serial: 8250_bcm7271: use default_mux_rate if possible
  serial: 8520_mtk: Set RTS on shutdown for Rx in-band wakeup
  tty: n_gsm: fix missing receive state reset after mode switch
  tty: n_gsm: fix possible out-of-bounds in gsm0_receive()
2024-05-24 08:38:28 -07:00
Linus Torvalds
b0a9ba13ff hardening fixes for v6.10-rc1
- loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module decompression
   (Stephen Boyd)
 
 - ubsan: Restore dependency on ARCH_HAS_UBSAN
 
 - kunit/fortify: Fix memcmp() test to be amplitude agnostic
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Merge tag 'hardening-v6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull hardening fixes from Kees Cook:

 - loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module
   decompression (Stephen Boyd)

 - ubsan: Restore dependency on ARCH_HAS_UBSAN

 - kunit/fortify: Fix memcmp() test to be amplitude agnostic

* tag 'hardening-v6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  kunit/fortify: Fix memcmp() test to be amplitude agnostic
  ubsan: Restore dependency on ARCH_HAS_UBSAN
  loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module decompression
2024-05-24 08:33:44 -07:00
Linus Torvalds
0eb03c7e8e tracefs/eventfs fixes and updates for v6.10:
Bug fixes:
 
 - The eventfs directories need to have unique inode numbers. Make sure that
   they do not get the default file inode number.
 
 - Update the inode uid and gid fields on remount.
   When a remount happens where a uid and/or gid is specified, all the tracefs
   files and directories should get the specified uid and/or gid. But this
   can be sporadic when some uids were assigned already. There's already
   a list of inodes that are allocated. Just update their uid and gid fields
   at the time of remount.
 
 - Update the eventfs_inodes on remount from the top level "events" descriptor.
   There was a bug where not all the eventfs files or directories where
   getting updated on remount. One fix was to clear the SAVED_UID/GID
   flags from the inode list during the iteration of the inodes during
   the remount. But because the eventfs inodes can be freed when the last
   referenced is released, not all the eventfs_inodes were being updated.
   This lead to the ownership selftest to fail if it was run a second
   time (the first time would leave eventfs_inodes with no corresponding
   tracefs_inode).
 
   Instead, for eventfs_inodes, only process the "events" eventfs_inode
   from the list iteration, as it is guaranteed to have a tracefs_inode
   (it's never freed while the "events" directory exists). As it has
   a list of its children, and the children have a list of their children,
   just iterate all the eventfs_inodes from the "events" descriptor and
   it is guaranteed to get all of them.
 
 - Clear the EVENT_INODE flag from the tracefs_drop_inode() callback.
   Currently the EVENTFS_INODE FLAG is cleared in the tracefs_d_iput()
   callback. But this is the wrong location. The iput() callback is
   called when the last reference to the dentry inode is hit. There could
   be a case where two dentry's have the same inode, and the flag will
   be cleared prematurely. The flag needs to be cleared when the last
   reference of the inode is dropped and that happens in the inode's
   drop_inode() callback handler.
 
 Clean ups:
 
 - Consolidate the creation of a tracefs_inode for an eventfs_inode
   A tracefs_inode is created for both files and directories of the
   eventfs system. It is open coded. Instead, consolidate it into a
   single eventfs_get_inode() function call.
 
 - Remove the eventfs getattr and permission callbacks.
   The permissions for the eventfs files and directories are updated
   when the inodes are created, on remount, and when the user sets
   them (via setattr). The inodes hold the current permissions so
   there is no need to have custom getattr or permissions callbacks
   as they will more likely cause them to be incorrect. The inode's
   permissions are updated when they should be updated. Remove the
   getattr and permissions inode callbacks.
 
 - Do not update eventfs_inode attributes on creation of inodes.
   The eventfs_inodes attribute field is used to store the permissions
   of the directories and files for when their corresponding inodes
   are freed and are created again. But when the creation of the inodes
   happen, the eventfs_inode attributes are recalculated. The
   recalculation should only happen when the permissions change for
   a given file or directory. Currently, the attribute changes are
   just being set to their current files so this is not a bug, but
   it's unnecessary and error prone. Stop doing that.
 
 - The events directory inode is created once when the events directory
   is created and deleted when it is deleted. It is now updated on
   remount and when the user changes the permissions. There's no need
   to use the eventfs_inode of the events directory to store the
   events directory permissions. But using it to store the default
   permissions for the files within the directory that have not been
   updated by the user can simplify the code.
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Merge tag 'trace-tracefs-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracefs/eventfs updates from Steven Rostedt:
 "Bug fixes:

   - The eventfs directories need to have unique inode numbers. Make
     sure that they do not get the default file inode number.

   - Update the inode uid and gid fields on remount.

     When a remount happens where a uid and/or gid is specified, all the
     tracefs files and directories should get the specified uid and/or
     gid. But this can be sporadic when some uids were assigned already.
     There's already a list of inodes that are allocated. Just update
     their uid and gid fields at the time of remount.

   - Update the eventfs_inodes on remount from the top level "events"
     descriptor.

     There was a bug where not all the eventfs files or directories
     where getting updated on remount. One fix was to clear the
     SAVED_UID/GID flags from the inode list during the iteration of the
     inodes during the remount. But because the eventfs inodes can be
     freed when the last referenced is released, not all the
     eventfs_inodes were being updated. This lead to the ownership
     selftest to fail if it was run a second time (the first time would
     leave eventfs_inodes with no corresponding tracefs_inode).

     Instead, for eventfs_inodes, only process the "events"
     eventfs_inode from the list iteration, as it is guaranteed to have
     a tracefs_inode (it's never freed while the "events" directory
     exists). As it has a list of its children, and the children have a
     list of their children, just iterate all the eventfs_inodes from
     the "events" descriptor and it is guaranteed to get all of them.

   - Clear the EVENT_INODE flag from the tracefs_drop_inode() callback.

     Currently the EVENTFS_INODE FLAG is cleared in the tracefs_d_iput()
     callback. But this is the wrong location. The iput() callback is
     called when the last reference to the dentry inode is hit. There
     could be a case where two dentry's have the same inode, and the
     flag will be cleared prematurely. The flag needs to be cleared when
     the last reference of the inode is dropped and that happens in the
     inode's drop_inode() callback handler.

  Cleanups:

   - Consolidate the creation of a tracefs_inode for an eventfs_inode

     A tracefs_inode is created for both files and directories of the
     eventfs system. It is open coded. Instead, consolidate it into a
     single eventfs_get_inode() function call.

   - Remove the eventfs getattr and permission callbacks.

     The permissions for the eventfs files and directories are updated
     when the inodes are created, on remount, and when the user sets
     them (via setattr). The inodes hold the current permissions so
     there is no need to have custom getattr or permissions callbacks as
     they will more likely cause them to be incorrect. The inode's
     permissions are updated when they should be updated. Remove the
     getattr and permissions inode callbacks.

   - Do not update eventfs_inode attributes on creation of inodes.

     The eventfs_inodes attribute field is used to store the permissions
     of the directories and files for when their corresponding inodes
     are freed and are created again. But when the creation of the
     inodes happen, the eventfs_inode attributes are recalculated. The
     recalculation should only happen when the permissions change for a
     given file or directory. Currently, the attribute changes are just
     being set to their current files so this is not a bug, but it's
     unnecessary and error prone. Stop doing that.

   - The events directory inode is created once when the events
     directory is created and deleted when it is deleted. It is now
     updated on remount and when the user changes the permissions.
     There's no need to use the eventfs_inode of the events directory to
     store the events directory permissions. But using it to store the
     default permissions for the files within the directory that have
     not been updated by the user can simplify the code"

* tag 'trace-tracefs-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  eventfs: Do not use attributes for events directory
  eventfs: Cleanup permissions in creation of inodes
  eventfs: Remove getattr and permission callbacks
  eventfs: Consolidate the eventfs_inode update in eventfs_get_inode()
  tracefs: Clear EVENT_INODE flag in tracefs_drop_inode()
  eventfs: Update all the eventfs_inodes from the events descriptor
  tracefs: Update inode permissions on remount
  eventfs: Keep the directories from having the same inode number as files
2024-05-24 08:27:34 -07:00
Christian Brauner
712182b67e swap: yield device immediately
Otherwise we can cause spurious EBUSY issues when trying to mount the
rootfs later on.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=218845
Reported-by: Petri Kaukasoina <petri.kaukasoina@tuni.fi>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-05-24 13:34:08 +02:00
David Howells
c596bea145 netfs: Fix setting of BDP_ASYNC from iocb flags
Fix netfs_perform_write() to set BDP_ASYNC if IOCB_NOWAIT is set rather
than if IOCB_SYNC is not set.  It reflects asynchronicity in the sense of
not waiting rather than synchronicity in the sense of not returning until
the op is complete.

Without this, generic/590 fails on cifs in strict caching mode with a
complaint that one of the writes fails with EAGAIN.  The test can be
distilled down to:

        mount -t cifs /my/share /mnt -ostuff
        xfs_io -i -c 'falloc 0 8191M -c fsync -f /mnt/file
        xfs_io -i -c 'pwrite -b 1M -W 0 8191M' /mnt/file

Fixes: c38f4e96e6 ("netfs: Provide func to copy data to pagecache for buffered write")
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/316306.1716306586@warthog.procyon.org.uk
Reviewed-by: Jens Axboe <axboe@kernel.dk>
cc: Jeff Layton <jlayton@kernel.org>
cc: Enzo Matsumiya <ematsumiya@suse.de>
cc: Jens Axboe <axboe@kernel.dk>
cc: Matthew Wilcox <willy@infradead.org>
cc: netfs@lists.linux.dev
cc: v9fs@lists.linux.dev
cc: linux-afs@lists.infradead.org
cc: linux-cifs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-05-24 13:34:07 +02:00
Fedor Pchelkin
65bea99537 signalfd: drop an obsolete comment
Commit fbe38120eb ("signalfd: convert to ->read_iter()") removed the
call to anon_inode_getfd() by splitting fd setup into two parts. Drop the
comment referencing the internal details of that function.

Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Link: https://lore.kernel.org/r/20240520090819.76342-2-pchelkin@ispras.ru
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-05-24 13:34:07 +02:00
Fedor Pchelkin
f826bc9d6f signalfd: fix error return code
If anon_inode_getfile() fails, return appropriate error code. This looks
like a single typo: the similar code changes in timerfd and userfaultfd
are okay.

Found by Linux Verification Center (linuxtesting.org).

Fixes: fbe38120eb ("signalfd: convert to ->read_iter()")
Signed-off-by: Fedor Pchelkin <pchelkin@ispras.ru>
Link: https://lore.kernel.org/r/20240520090819.76342-1-pchelkin@ispras.ru
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-05-24 13:34:07 +02:00
Xu Yang
4e527d5841 iomap: fault in smaller chunks for non-large folio mappings
Since commit (5d8edfb900 "iomap: Copy larger chunks from userspace"),
iomap will try to copy in larger chunks than PAGE_SIZE. However, if the
mapping doesn't support large folio, only one page of maximum 4KB will
be created and 4KB data will be writen to pagecache each time. Then,
next 4KB will be handled in next iteration. This will cause potential
write performance problem.

If chunk is 2MB, total 512 pages need to be handled finally. During this
period, fault_in_iov_iter_readable() is called to check iov_iter readable
validity. Since only 4KB will be handled each time, below address space
will be checked over and over again:

start         	end
-
buf,    	buf+2MB
buf+4KB, 	buf+2MB
buf+8KB, 	buf+2MB
...
buf+2044KB 	buf+2MB

Obviously the checking size is wrong since only 4KB will be handled each
time. So this will get a correct chunk to let iomap work well in non-large
folio case.

With this change, the write speed will be stable. Tested on ARM64 device.

Before:

 - dd if=/dev/zero of=/dev/sda bs=400K  count=10485  (334 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=800K  count=5242   (278 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=1600K count=2621   (204 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=2200K count=1906   (170 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=3000K count=1398   (150 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=4500K count=932    (139 MB/s)

After:

 - dd if=/dev/zero of=/dev/sda bs=400K  count=10485  (339 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=800K  count=5242   (330 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=1600K count=2621   (332 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=2200K count=1906   (333 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=3000K count=1398   (333 MB/s)
 - dd if=/dev/zero of=/dev/sda bs=4500K count=932    (333 MB/s)

Fixes: 5d8edfb900 ("iomap: Copy larger chunks from userspace")
Cc: stable@vger.kernel.org
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20240521114939.2541461-2-xu.yang_2@nxp.com
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-05-24 13:34:07 +02:00
Xu Yang
79c1374548 filemap: add helper mapping_max_folio_size()
Add mapping_max_folio_size() to get the maximum folio size for this
pagecache mapping.

Fixes: 5d8edfb900 ("iomap: Copy larger chunks from userspace")
Cc: stable@vger.kernel.org
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20240521114939.2541461-1-xu.yang_2@nxp.com
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-05-24 13:34:06 +02:00
David Howells
2c6b531020 netfs: Fix AIO error handling when doing write-through
If an error occurs whilst we're doing an AIO write in write-through mode,
we may end up calling ->ki_complete() *and* returning an error from
->write_iter().  This can result in either a UAF (the ->ki_complete() func
pointer may get overwritten, for example) or a refcount underflow in
io_submit() as ->ki_complete is called twice.

Fix this by making netfs_end_writethrough() - and thus
netfs_perform_write() - unconditionally return -EIOCBQUEUED if we're doing
an AIO write and wait for completion if we're not.

Fixes: 288ace2f57 ("netfs: New writeback implementation")
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/295052.1716298587@warthog.procyon.org.uk
cc: Jeff Layton <jlayton@kernel.org>
cc: Enzo Matsumiya <ematsumiya@suse.de>
cc: netfs@lists.linux.dev
cc: v9fs@lists.linux.dev
cc: linux-afs@lists.infradead.org
cc: linux-cifs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-05-24 13:34:06 +02:00
David Howells
9b038d004c netfs: Fix io_uring based write-through
This can be triggered by mounting a cifs filesystem with a cache=strict
mount option and then, using the fsx program from xfstests, doing:

        ltp/fsx -A -d -N 1000 -S 11463 -P /tmp /cifs-mount/foo \
          --replay-ops=gen112-fsxops

Where gen112-fsxops holds:

        fallocate 0x6be7 0x8fc5 0x377d3
        copy_range 0x9c71 0x77e8 0x2edaf 0x377d3
        write 0x2776d 0x8f65 0x377d3

The problem is that netfs_io_request::len is being used for two purposes
and ends up getting set to the amount of data we transferred, not the
amount of data the caller asked to be transferred (for various reasons,
such as mmap'd writes, we might end up rounding out the data written to the
server to include the entire folio at each end).

Fix this by keeping the amount we were asked to write in ->len and using
->submitted to track what we issued ops for.  Then, when we come to calling
->ki_complete(), ->len is the right size.

This also required netfs_cleanup_dio_write() to change since we're no
longer advancing wreq->len.  Use wreq->transferred instead as we might have
done a short read.

With this, the generic/112 xfstest passes if cifs is forced to put all
non-DIO opens into write-through mode.

Fixes: 288ace2f57 ("netfs: New writeback implementation")
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/295086.1716298663@warthog.procyon.org.uk
cc: Jeff Layton <jlayton@kernel.org>
cc: Steve French <stfrench@microsoft.com>
cc: Enzo Matsumiya <ematsumiya@suse.de>
cc: netfs@lists.linux.dev
cc: v9fs@lists.linux.dev
cc: linux-afs@lists.infradead.org
cc: linux-cifs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-05-24 13:34:06 +02:00
dicken.ding
b84a8aba80 genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()
irq_find_at_or_after() dereferences the interrupt descriptor which is
returned by mt_find() while neither holding sparse_irq_lock nor RCU read
lock, which means the descriptor can be freed between mt_find() and the
dereference:

    CPU0                            CPU1
    desc = mt_find()
                                    delayed_free_desc(desc)
    irq_desc_get_irq(desc)

The use-after-free is reported by KASAN:

    Call trace:
     irq_get_next_irq+0x58/0x84
     show_stat+0x638/0x824
     seq_read_iter+0x158/0x4ec
     proc_reg_read_iter+0x94/0x12c
     vfs_read+0x1e0/0x2c8

    Freed by task 4471:
     slab_free_freelist_hook+0x174/0x1e0
     __kmem_cache_free+0xa4/0x1dc
     kfree+0x64/0x128
     irq_kobj_release+0x28/0x3c
     kobject_put+0xcc/0x1e0
     delayed_free_desc+0x14/0x2c
     rcu_do_batch+0x214/0x720

Guard the access with a RCU read lock section.

Fixes: 721255b982 ("genirq: Use a maple tree for interrupt descriptor management")
Signed-off-by: dicken.ding <dicken.ding@mediatek.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240524091739.31611-1-dicken.ding@mediatek.com
2024-05-24 12:49:35 +02:00
Konstantin Komarov
302e9dca84
fs/ntfs3: Break dir enumeration if directory contents error
If we somehow attempt to read beyond the directory size, an error
is supposed to be returned.

However, in some cases, read requests do not stop and instead enter
into a loop.

To avoid this, we set the position in the directory to the end.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: stable@vger.kernel.org
2024-05-24 12:50:12 +03:00
Konstantin Komarov
05afeeebca
fs/ntfs3: Fix case when index is reused during tree transformation
In most cases when adding a cluster to the directory index,
they are placed at the end, and in the bitmap, this cluster corresponds
to the last bit. The new directory size is calculated as follows:

	data_size = (u64)(bit + 1) << indx->index_bits;

In the case of reusing a non-final cluster from the index,
data_size is calculated incorrectly, resulting in the directory size
differing from the actual size.

A check for cluster reuse has been added, and the size update is skipped.

Fixes: 82cae269cf ("fs/ntfs3: Add initialization of super block")
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Cc: stable@vger.kernel.org
2024-05-24 12:50:12 +03:00
Jeff Xu
a52b4f11a2 selftest mm/mseal read-only elf memory segment
Sealing read-only of elf mapping so it can't be changed by mprotect.

[jeffxu@chromium.org: style change]
  Link: https://lkml.kernel.org/r/20240416220944.2481203-2-jeffxu@chromium.org
[amer.shanawany@gmail.com: fix linker error for inline function]
  Link: https://lkml.kernel.org/r/20240420202346.546444-1-amer.shanawany@gmail.com
[jeffxu@chromium.org: fix compile warning]
  Link: https://lkml.kernel.org/r/20240420003515.345982-2-jeffxu@chromium.org
[jeffxu@chromium.org: fix arm build]
  Link: https://lkml.kernel.org/r/20240502225331.3806279-2-jeffxu@chromium.org
Link: https://lkml.kernel.org/r/20240415163527.626541-6-jeffxu@chromium.org
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Signed-off-by: Amer Al Shanawany <amer.shanawany@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Jann Horn <jannh@google.com>
Cc: Jeff Xu <jeffxu@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Stephen Röttger <sroettger@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Amer Al Shanawany <amer.shanawany@gmail.com>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-23 19:40:27 -07:00
Jeff Xu
c010d09900 mseal: add documentation
Add documentation for mseal().

Link: https://lkml.kernel.org/r/20240415163527.626541-5-jeffxu@chromium.org
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Jann Horn <jannh@google.com>
Cc: Jeff Xu <jeffxu@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Stephen Röttger <sroettger@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Amer Al Shanawany <amer.shanawany@gmail.com>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-23 19:40:26 -07:00
Jeff Xu
4926c7a52d selftest mm/mseal memory sealing
selftest for memory sealing change in mmap() and mseal().

Link: https://lkml.kernel.org/r/20240415163527.626541-4-jeffxu@chromium.org
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Jann Horn <jannh@google.com>
Cc: Jeff Xu <jeffxu@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Stephen Röttger <sroettger@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Amer Al Shanawany <amer.shanawany@gmail.com>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-23 19:40:26 -07:00
Jeff Xu
8be7258aad mseal: add mseal syscall
The new mseal() is an syscall on 64 bit CPU, and with following signature:

int mseal(void addr, size_t len, unsigned long flags)
addr/len: memory range.
flags: reserved.

mseal() blocks following operations for the given memory range.

1> Unmapping, moving to another location, and shrinking the size,
   via munmap() and mremap(), can leave an empty space, therefore can
   be replaced with a VMA with a new set of attributes.

2> Moving or expanding a different VMA into the current location,
   via mremap().

3> Modifying a VMA via mmap(MAP_FIXED).

4> Size expansion, via mremap(), does not appear to pose any specific
   risks to sealed VMAs. It is included anyway because the use case is
   unclear. In any case, users can rely on merging to expand a sealed VMA.

5> mprotect() and pkey_mprotect().

6> Some destructive madvice() behaviors (e.g. MADV_DONTNEED) for anonymous
   memory, when users don't have write permission to the memory. Those
   behaviors can alter region contents by discarding pages, effectively a
   memset(0) for anonymous memory.

Following input during RFC are incooperated into this patch:

Jann Horn: raising awareness and providing valuable insights on the
destructive madvise operations.
Linus Torvalds: assisting in defining system call signature and scope.
Liam R. Howlett: perf optimization.
Theo de Raadt: sharing the experiences and insight gained from
  implementing mimmutable() in OpenBSD.

Finally, the idea that inspired this patch comes from Stephen Röttger's
work in Chrome V8 CFI.

[jeffxu@chromium.org: add branch prediction hint, per Pedro]
  Link: https://lkml.kernel.org/r/20240423192825.1273679-2-jeffxu@chromium.org
Link: https://lkml.kernel.org/r/20240415163527.626541-3-jeffxu@chromium.org
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Jann Horn <jannh@google.com>
Cc: Jeff Xu <jeffxu@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Stephen Röttger <sroettger@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Amer Al Shanawany <amer.shanawany@gmail.com>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-23 19:40:26 -07:00
Jeff Xu
ff388fe5c4 mseal: wire up mseal syscall
Patch series "Introduce mseal", v10.

This patchset proposes a new mseal() syscall for the Linux kernel.

In a nutshell, mseal() protects the VMAs of a given virtual memory range
against modifications, such as changes to their permission bits.

Modern CPUs support memory permissions, such as the read/write (RW) and
no-execute (NX) bits.  Linux has supported NX since the release of kernel
version 2.6.8 in August 2004 [1].  The memory permission feature improves
the security stance on memory corruption bugs, as an attacker cannot
simply write to arbitrary memory and point the code to it.  The memory
must be marked with the X bit, or else an exception will occur. 
Internally, the kernel maintains the memory permissions in a data
structure called VMA (vm_area_struct).  mseal() additionally protects the
VMA itself against modifications of the selected seal type.

Memory sealing is useful to mitigate memory corruption issues where a
corrupted pointer is passed to a memory management system.  For example,
such an attacker primitive can break control-flow integrity guarantees
since read-only memory that is supposed to be trusted can become writable
or .text pages can get remapped.  Memory sealing can automatically be
applied by the runtime loader to seal .text and .rodata pages and
applications can additionally seal security critical data at runtime.  A
similar feature already exists in the XNU kernel with the
VM_FLAGS_PERMANENT [3] flag and on OpenBSD with the mimmutable syscall
[4].  Also, Chrome wants to adopt this feature for their CFI work [2] and
this patchset has been designed to be compatible with the Chrome use case.

Two system calls are involved in sealing the map:  mmap() and mseal().

The new mseal() is an syscall on 64 bit CPU, and with following signature:

int mseal(void addr, size_t len, unsigned long flags)
addr/len: memory range.
flags: reserved.

mseal() blocks following operations for the given memory range.

1> Unmapping, moving to another location, and shrinking the size,
   via munmap() and mremap(), can leave an empty space, therefore can
   be replaced with a VMA with a new set of attributes.

2> Moving or expanding a different VMA into the current location,
   via mremap().

3> Modifying a VMA via mmap(MAP_FIXED).

4> Size expansion, via mremap(), does not appear to pose any specific
   risks to sealed VMAs. It is included anyway because the use case is
   unclear. In any case, users can rely on merging to expand a sealed VMA.

5> mprotect() and pkey_mprotect().

6> Some destructive madvice() behaviors (e.g. MADV_DONTNEED) for anonymous
   memory, when users don't have write permission to the memory. Those
   behaviors can alter region contents by discarding pages, effectively a
   memset(0) for anonymous memory.

The idea that inspired this patch comes from Stephen Röttger’s work in
V8 CFI [5].  Chrome browser in ChromeOS will be the first user of this
API.

Indeed, the Chrome browser has very specific requirements for sealing,
which are distinct from those of most applications.  For example, in the
case of libc, sealing is only applied to read-only (RO) or read-execute
(RX) memory segments (such as .text and .RELRO) to prevent them from
becoming writable, the lifetime of those mappings are tied to the lifetime
of the process.

Chrome wants to seal two large address space reservations that are managed
by different allocators.  The memory is mapped RW- and RWX respectively
but write access to it is restricted using pkeys (or in the future ARM
permission overlay extensions).  The lifetime of those mappings are not
tied to the lifetime of the process, therefore, while the memory is
sealed, the allocators still need to free or discard the unused memory. 
For example, with madvise(DONTNEED).

However, always allowing madvise(DONTNEED) on this range poses a security
risk.  For example if a jump instruction crosses a page boundary and the
second page gets discarded, it will overwrite the target bytes with zeros
and change the control flow.  Checking write-permission before the discard
operation allows us to control when the operation is valid.  In this case,
the madvise will only succeed if the executing thread has PKEY write
permissions and PKRU changes are protected in software by control-flow
integrity.

Although the initial version of this patch series is targeting the Chrome
browser as its first user, it became evident during upstream discussions
that we would also want to ensure that the patch set eventually is a
complete solution for memory sealing and compatible with other use cases. 
The specific scenario currently in mind is glibc's use case of loading and
sealing ELF executables.  To this end, Stephen is working on a change to
glibc to add sealing support to the dynamic linker, which will seal all
non-writable segments at startup.  Once this work is completed, all
applications will be able to automatically benefit from these new
protections.

In closing, I would like to formally acknowledge the valuable
contributions received during the RFC process, which were instrumental in
shaping this patch:

Jann Horn: raising awareness and providing valuable insights on the
  destructive madvise operations.
Liam R. Howlett: perf optimization.
Linus Torvalds: assisting in defining system call signature and scope.
Theo de Raadt: sharing the experiences and insight gained from
  implementing mimmutable() in OpenBSD.

MM perf benchmarks
==================
This patch adds a loop in the mprotect/munmap/madvise(DONTNEED) to
check the VMAs’ sealing flag, so that no partial update can be made,
when any segment within the given memory range is sealed.

To measure the performance impact of this loop, two tests are developed.
[8]

The first is measuring the time taken for a particular system call,
by using clock_gettime(CLOCK_MONOTONIC). The second is using
PERF_COUNT_HW_REF_CPU_CYCLES (exclude user space). Both tests have
similar results.

The tests have roughly below sequence:
for (i = 0; i < 1000, i++)
    create 1000 mappings (1 page per VMA)
    start the sampling
    for (j = 0; j < 1000, j++)
        mprotect one mapping
    stop and save the sample
    delete 1000 mappings
calculates all samples.

Below tests are performed on Intel(R) Pentium(R) Gold 7505 @ 2.00GHz,
4G memory, Chromebook.

Based on the latest upstream code:
The first test (measuring time)
syscall__	vmas	t	t_mseal	delta_ns	per_vma	%
munmap__  	1	909	944	35	35	104%
munmap__  	2	1398	1502	104	52	107%
munmap__  	4	2444	2594	149	37	106%
munmap__  	8	4029	4323	293	37	107%
munmap__  	16	6647	6935	288	18	104%
munmap__  	32	11811	12398	587	18	105%
mprotect	1	439	465	26	26	106%
mprotect	2	1659	1745	86	43	105%
mprotect	4	3747	3889	142	36	104%
mprotect	8	6755	6969	215	27	103%
mprotect	16	13748	14144	396	25	103%
mprotect	32	27827	28969	1142	36	104%
madvise_	1	240	262	22	22	109%
madvise_	2	366	442	76	38	121%
madvise_	4	623	751	128	32	121%
madvise_	8	1110	1324	215	27	119%
madvise_	16	2127	2451	324	20	115%
madvise_	32	4109	4642	534	17	113%

The second test (measuring cpu cycle)
syscall__	vmas	cpu	cmseal	delta_cpu	per_vma	%
munmap__	1	1790	1890	100	100	106%
munmap__	2	2819	3033	214	107	108%
munmap__	4	4959	5271	312	78	106%
munmap__	8	8262	8745	483	60	106%
munmap__	16	13099	14116	1017	64	108%
munmap__	32	23221	24785	1565	49	107%
mprotect	1	906	967	62	62	107%
mprotect	2	3019	3203	184	92	106%
mprotect	4	6149	6569	420	105	107%
mprotect	8	9978	10524	545	68	105%
mprotect	16	20448	21427	979	61	105%
mprotect	32	40972	42935	1963	61	105%
madvise_	1	434	497	63	63	115%
madvise_	2	752	899	147	74	120%
madvise_	4	1313	1513	200	50	115%
madvise_	8	2271	2627	356	44	116%
madvise_	16	4312	4883	571	36	113%
madvise_	32	8376	9319	943	29	111%

Based on the result, for 6.8 kernel, sealing check adds
20-40 nano seconds, or around 50-100 CPU cycles, per VMA.

In addition, I applied the sealing to 5.10 kernel:
The first test (measuring time)
syscall__	vmas	t	tmseal	delta_ns	per_vma	%
munmap__	1	357	390	33	33	109%
munmap__	2	442	463	21	11	105%
munmap__	4	614	634	20	5	103%
munmap__	8	1017	1137	120	15	112%
munmap__	16	1889	2153	263	16	114%
munmap__	32	4109	4088	-21	-1	99%
mprotect	1	235	227	-7	-7	97%
mprotect	2	495	464	-30	-15	94%
mprotect	4	741	764	24	6	103%
mprotect	8	1434	1437	2	0	100%
mprotect	16	2958	2991	33	2	101%
mprotect	32	6431	6608	177	6	103%
madvise_	1	191	208	16	16	109%
madvise_	2	300	324	24	12	108%
madvise_	4	450	473	23	6	105%
madvise_	8	753	806	53	7	107%
madvise_	16	1467	1592	125	8	108%
madvise_	32	2795	3405	610	19	122%
					
The second test (measuring cpu cycle)
syscall__	nbr_vma	cpu	cmseal	delta_cpu	per_vma	%
munmap__	1	684	715	31	31	105%
munmap__	2	861	898	38	19	104%
munmap__	4	1183	1235	51	13	104%
munmap__	8	1999	2045	46	6	102%
munmap__	16	3839	3816	-23	-1	99%
munmap__	32	7672	7887	216	7	103%
mprotect	1	397	443	46	46	112%
mprotect	2	738	788	50	25	107%
mprotect	4	1221	1256	35	9	103%
mprotect	8	2356	2429	72	9	103%
mprotect	16	4961	4935	-26	-2	99%
mprotect	32	9882	10172	291	9	103%
madvise_	1	351	380	29	29	108%
madvise_	2	565	615	49	25	109%
madvise_	4	872	933	61	15	107%
madvise_	8	1508	1640	132	16	109%
madvise_	16	3078	3323	245	15	108%
madvise_	32	5893	6704	811	25	114%

For 5.10 kernel, sealing check adds 0-15 ns in time, or 10-30
CPU cycles, there is even decrease in some cases.

It might be interesting to compare 5.10 and 6.8 kernel
The first test (measuring time)
syscall__	vmas	t_5_10	t_6_8	delta_ns	per_vma	%
munmap__	1	357	909	552	552	254%
munmap__	2	442	1398	956	478	316%
munmap__	4	614	2444	1830	458	398%
munmap__	8	1017	4029	3012	377	396%
munmap__	16	1889	6647	4758	297	352%
munmap__	32	4109	11811	7702	241	287%
mprotect	1	235	439	204	204	187%
mprotect	2	495	1659	1164	582	335%
mprotect	4	741	3747	3006	752	506%
mprotect	8	1434	6755	5320	665	471%
mprotect	16	2958	13748	10790	674	465%
mprotect	32	6431	27827	21397	669	433%
madvise_	1	191	240	49	49	125%
madvise_	2	300	366	67	33	122%
madvise_	4	450	623	173	43	138%
madvise_	8	753	1110	357	45	147%
madvise_	16	1467	2127	660	41	145%
madvise_	32	2795	4109	1314	41	147%

The second test (measuring cpu cycle)
syscall__	vmas	cpu_5_10	c_6_8	delta_cpu	per_vma	%
munmap__	1	684	1790	1106	1106	262%
munmap__	2	861	2819	1958	979	327%
munmap__	4	1183	4959	3776	944	419%
munmap__	8	1999	8262	6263	783	413%
munmap__	16	3839	13099	9260	579	341%
munmap__	32	7672	23221	15549	486	303%
mprotect	1	397	906	509	509	228%
mprotect	2	738	3019	2281	1140	409%
mprotect	4	1221	6149	4929	1232	504%
mprotect	8	2356	9978	7622	953	423%
mprotect	16	4961	20448	15487	968	412%
mprotect	32	9882	40972	31091	972	415%
madvise_	1	351	434	82	82	123%
madvise_	2	565	752	186	93	133%
madvise_	4	872	1313	442	110	151%
madvise_	8	1508	2271	763	95	151%
madvise_	16	3078	4312	1234	77	140%
madvise_	32	5893	8376	2483	78	142%

From 5.10 to 6.8
munmap: added 250-550 ns in time, or 500-1100 in cpu cycle, per vma.
mprotect: added 200-750 ns in time, or 500-1200 in cpu cycle, per vma.
madvise: added 33-50 ns in time, or 70-110 in cpu cycle, per vma.

In comparison to mseal, which adds 20-40 ns or 50-100 CPU cycles, the
increase from 5.10 to 6.8 is significantly larger, approximately ten times
greater for munmap and mprotect.

When I discuss the mm performance with Brian Makin, an engineer who worked
on performance, it was brought to my attention that such performance
benchmarks, which measuring millions of mm syscall in a tight loop, may
not accurately reflect real-world scenarios, such as that of a database
service.  Also this is tested using a single HW and ChromeOS, the data
from another HW or distribution might be different.  It might be best to
take this data with a grain of salt.


This patch (of 5):

Wire up mseal syscall for all architectures.

Link: https://lkml.kernel.org/r/20240415163527.626541-1-jeffxu@chromium.org
Link: https://lkml.kernel.org/r/20240415163527.626541-2-jeffxu@chromium.org
Signed-off-by: Jeff Xu <jeffxu@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: Jann Horn <jannh@google.com> [Bug #2]
Cc: Jeff Xu <jeffxu@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Jorge Lucangeli Obes <jorgelo@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Cc: Stephen Röttger <sroettger@google.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Amer Al Shanawany <amer.shanawany@gmail.com>
Cc: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-05-23 19:40:26 -07:00
Linus Torvalds
6d69b6c12f NFS client updates for Linux 6.10
Highlights include:
 
 Stable fixes:
 - nfs: fix undefined behavior in nfs_block_bits()
 - NFSv4.2: Fix READ_PLUS when server doesn't support OP_READ_PLUS
 
 Bugfixes:
 - Fix mixing of the lock/nolock and local_lock mount options
 - NFSv4: Fixup smatch warning for ambiguous return
 - NFSv3: Fix remount when using the legacy binary mount api
 - SUNRPC: Fix the handling of expired RPCSEC_GSS contexts
 - SUNRPC: fix the NFSACL RPC retries when soft mounts are enabled
 - rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL
 
 Features and cleanups:
 - NFSv3: Use the atomic_open API to fix open(O_CREAT|O_TRUNC)
 - pNFS/filelayout: S layout segment range in LAYOUTGET
 - pNFS: rework pnfs_generic_pg_check_layout to check IO range
 - NFSv2: Turn off enabling of NFS v2 by default
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Merge tag 'nfs-for-6.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
 "Stable fixes:
   - nfs: fix undefined behavior in nfs_block_bits()
   - NFSv4.2: Fix READ_PLUS when server doesn't support OP_READ_PLUS

  Bugfixes:
   - Fix mixing of the lock/nolock and local_lock mount options
   - NFSv4: Fixup smatch warning for ambiguous return
   - NFSv3: Fix remount when using the legacy binary mount api
   - SUNRPC: Fix the handling of expired RPCSEC_GSS contexts
   - SUNRPC: fix the NFSACL RPC retries when soft mounts are enabled
   - rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL

  Features and cleanups:
   - NFSv3: Use the atomic_open API to fix open(O_CREAT|O_TRUNC)
   - pNFS/filelayout: S layout segment range in LAYOUTGET
   - pNFS: rework pnfs_generic_pg_check_layout to check IO range
   - NFSv2: Turn off enabling of NFS v2 by default"

* tag 'nfs-for-6.10-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  nfs: fix undefined behavior in nfs_block_bits()
  pNFS: rework pnfs_generic_pg_check_layout to check IO range
  pNFS/filelayout: check layout segment range
  pNFS/filelayout: fixup pNfs allocation modes
  rpcrdma: fix handling for RDMA_CM_EVENT_DEVICE_REMOVAL
  NFS: Don't enable NFS v2 by default
  NFS: Fix READ_PLUS when server doesn't support OP_READ_PLUS
  sunrpc: fix NFSACL RPC retry on soft mount
  SUNRPC: fix handling expired GSS context
  nfs: keep server info for remounts
  NFSv4: Fixup smatch warning for ambiguous return
  NFS: make sure lock/nolock overriding local_lock mount option
  NFS: add atomic_open for NFSv3 to handle O_TRUNC correctly.
  pNFS/filelayout: Specify the layout segment range in LAYOUTGET
  pNFS/filelayout: Remove the whole file layout requirement
2024-05-23 13:51:09 -07:00
Linus Torvalds
b4d88a60fe block-6.10-20240523
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Merge tag 'block-6.10-20240523' of git://git.kernel.dk/linux

Pull more block updates from Jens Axboe:
 "Followup block updates, mostly due to NVMe being a bit late to the
  party. But nothing major in there, so not a big deal.

  In detail, this contains:

   - NVMe pull request via Keith:
       - Fabrics connection retries (Daniel, Hannes)
       - Fabrics logging enhancements (Tokunori)
       - RDMA delete optimization (Sagi)

   - ublk DMA alignment fix (me)

   - null_blk sparse warning fixes (Bart)

   - Discard support for brd (Keith)

   - blk-cgroup list corruption fixes (Ming)

   - blk-cgroup stat propagation fix (Waiman)

   - Regression fix for plugging stall with md (Yu)

   - Misc fixes or cleanups (David, Jeff, Justin)"

* tag 'block-6.10-20240523' of git://git.kernel.dk/linux: (24 commits)
  null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues'
  blk-throttle: remove unused struct 'avg_latency_bucket'
  block: fix lost bio for plug enabled bio based device
  block: t10-pi: add MODULE_DESCRIPTION()
  blk-mq: add helper for checking if one CPU is mapped to specified hctx
  blk-cgroup: Properly propagate the iostat update up the hierarchy
  blk-cgroup: fix list corruption from reorder of WRITE ->lqueued
  blk-cgroup: fix list corruption from resetting io stat
  cdrom: rearrange last_media_change check to avoid unintentional overflow
  nbd: Fix signal handling
  nbd: Remove a local variable from nbd_send_cmd()
  nbd: Improve the documentation of the locking assumptions
  nbd: Remove superfluous casts
  nbd: Use NULL to represent a pointer
  brd: implement discard support
  null_blk: Fix two sparse warnings
  ublk_drv: set DMA alignment mask to 3
  nvme-rdma, nvme-tcp: include max reconnects for reconnect logging
  nvmet-rdma: Avoid o(n^2) loop in delete_ctrl
  nvme: do not retry authentication failures
  ...
2024-05-23 13:44:47 -07:00
Linus Torvalds
483a351ed4 io_uring-6.10-20240523
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Merge tag 'io_uring-6.10-20240523' of git://git.kernel.dk/linux

Pull io_uring fixes from Jens Axboe:
 "Single fix here for a regression in 6.9, and then a simple cleanup
  removing some dead code"

* tag 'io_uring-6.10-20240523' of git://git.kernel.dk/linux:
  io_uring: remove checks for NULL 'sq_offset'
  io_uring/sqpoll: ensure that normal task_work is also run timely
2024-05-23 13:41:49 -07:00
Linus Torvalds
c2c80ecdb4 regulator: Fixes for v6.10
A bunch of fixes that came in during the merge window, Matti found
 several issues with some of the more complexly configured Rohm
 regulators and the helpers they use and there were some errors in the
 specification of tps6594 when regulators are grouped together.
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Merge tag 'regulator-fix-v6.10-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "A bunch of fixes that came in during the merge window.

  Matti found several issues with some of the more complexly configured
  Rohm regulators and the helpers they use and there were some errors in
  the specification of tps6594 when regulators are grouped together"

* tag 'regulator-fix-v6.10-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: tps6594-regulator: Correct multi-phase configuration
  regulator: tps6287x: Force writing VSEL bit
  regulator: pickable ranges: don't always cache vsel
  regulator: rohm-regulator: warn if unsupported voltage is set
  regulator: bd71828: Don't overwrite runtime voltages
2024-05-23 13:39:42 -07:00
Linus Torvalds
09f8f2c4ca regmap: Fix for v6.10
Guenter ran with memory sanitisers and found an issue in the new KUnit
 tests that Richard added where an assumption in older test code was
 exposed, this was fixed quickly by Richard.
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Merge tag 'regmap-fix-v6.10-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap fix from Mark Brown:
 "Guenter ran with memory sanitisers and found an issue in the new KUnit
  tests that Richard added where an assumption in older test code was
  exposed, this was fixed quickly by Richard"

* tag 'regmap-fix-v6.10-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: kunit: Fix array overflow in stride() test
2024-05-23 13:38:31 -07:00
Dongli Zhang
a6c11c0a52 genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline
The absence of IRQD_MOVE_PCNTXT prevents immediate effectiveness of
interrupt affinity reconfiguration via procfs. Instead, the change is
deferred until the next instance of the interrupt being triggered on the
original CPU.

When the interrupt next triggers on the original CPU, the new affinity is
enforced within __irq_move_irq(). A vector is allocated from the new CPU,
but the old vector on the original CPU remains and is not immediately
reclaimed. Instead, apicd->move_in_progress is flagged, and the reclaiming
process is delayed until the next trigger of the interrupt on the new CPU.

Upon the subsequent triggering of the interrupt on the new CPU,
irq_complete_move() adds a task to the old CPU's vector_cleanup list if it
remains online. Subsequently, the timer on the old CPU iterates over its
vector_cleanup list, reclaiming old vectors.

However, a rare scenario arises if the old CPU is outgoing before the
interrupt triggers again on the new CPU.

In that case irq_force_complete_move() is not invoked on the outgoing CPU
to reclaim the old apicd->prev_vector because the interrupt isn't currently
affine to the outgoing CPU, and irq_needs_fixup() returns false. Even
though __vector_schedule_cleanup() is later called on the new CPU, it
doesn't reclaim apicd->prev_vector; instead, it simply resets both
apicd->move_in_progress and apicd->prev_vector to 0.

As a result, the vector remains unreclaimed in vector_matrix, leading to a
CPU vector leak.

To address this issue, move the invocation of irq_force_complete_move()
before the irq_needs_fixup() call to reclaim apicd->prev_vector, if the
interrupt is currently or used to be affine to the outgoing CPU.

Additionally, reclaim the vector in __vector_schedule_cleanup() as well,
following a warning message, although theoretically it should never see
apicd->move_in_progress with apicd->prev_cpu pointing to an offline CPU.

Fixes: f0383c24b4 ("genirq/cpuhotplug: Add support for cleaning up move in progress")
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20240522220218.162423-1-dongli.zhang@oracle.com
2024-05-23 21:51:50 +02:00
Linus Torvalds
66ad4829dd Quite smaller than usual. Notably it includes the fix for the unix
regression you have been notified of in the past weeks.
 The TCP window fix will require some follow-up, already queued.
 
 Current release - regressions:
 
   - af_unix: fix garbage collection of embryos
 
 Previous releases - regressions:
 
   - af_unix: fix race between GC and receive path
 
   - ipv6: sr: fix missing sk_buff release in seg6_input_core
 
   - tcp: remove 64 KByte limit for initial tp->rcv_wnd value
 
   - eth: r8169: fix rx hangup
 
   - eth: lan966x: remove ptp traps in case the ptp is not enabled.
 
   - eth: ixgbe: fix link breakage vs cisco switches.
 
   - eth: ice: prevent ethtool from corrupting the channels.
 
 Previous releases - always broken:
 
   - openvswitch: set the skbuff pkt_type for proper pmtud support.
 
   - tcp: Fix shift-out-of-bounds in dctcp_update_alpha().
 
 Misc:
 
   - a bunch of selftests stabilization patches.
 
 Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Merge tag 'net-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Quite smaller than usual. Notably it includes the fix for the unix
  regression from the past weeks. The TCP window fix will require some
  follow-up, already queued.

  Current release - regressions:

   - af_unix: fix garbage collection of embryos

  Previous releases - regressions:

   - af_unix: fix race between GC and receive path

   - ipv6: sr: fix missing sk_buff release in seg6_input_core

   - tcp: remove 64 KByte limit for initial tp->rcv_wnd value

   - eth: r8169: fix rx hangup

   - eth: lan966x: remove ptp traps in case the ptp is not enabled

   - eth: ixgbe: fix link breakage vs cisco switches

   - eth: ice: prevent ethtool from corrupting the channels

  Previous releases - always broken:

   - openvswitch: set the skbuff pkt_type for proper pmtud support

   - tcp: Fix shift-out-of-bounds in dctcp_update_alpha()

  Misc:

   - a bunch of selftests stabilization patches"

* tag 'net-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (25 commits)
  r8169: Fix possible ring buffer corruption on fragmented Tx packets.
  idpf: Interpret .set_channels() input differently
  ice: Interpret .set_channels() input differently
  nfc: nci: Fix handling of zero-length payload packets in nci_rx_work()
  net: relax socket state check at accept time.
  tcp: remove 64 KByte limit for initial tp->rcv_wnd value
  net: ti: icssg_prueth: Fix NULL pointer dereference in prueth_probe()
  tls: fix missing memory barrier in tls_init
  net: fec: avoid lock evasion when reading pps_enable
  Revert "ixgbe: Manual AN-37 for troublesome link partners for X550 SFI"
  testing: net-drv: use stats64 for testing
  net: mana: Fix the extra HZ in mana_hwc_send_request
  net: lan966x: Remove ptp traps in case the ptp is not enabled.
  openvswitch: Set the skbuff pkt_type for proper pmtud support.
  selftest: af_unix: Make SCM_RIGHTS into OOB data.
  af_unix: Fix garbage collection of embryos carrying OOB with SCM_RIGHTS
  tcp: Fix shift-out-of-bounds in dctcp_update_alpha().
  selftests/net: use tc rule to filter the na packet
  ipv6: sr: fix memleak in seg6_hmac_init_algo
  af_unix: Update unix_sk(sk)->oob_skb under sk_receive_queue lock.
  ...
2024-05-23 12:49:37 -07:00
Linus Torvalds
404001ddf3 tracing: Minor last minute fixes
- Fix a very tight race between the ring buffer readers and resizing
   the ring buffer.
 
 - Correct some stale comments in the ring buffer code.
 
 - Fix kernel-doc in the rv code.
 
 - Add a MODULE_DESCRIPTION to preemptirq_delay_test
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Merge tag 'trace-fixes-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Minor last minute fixes:

   - Fix a very tight race between the ring buffer readers and resizing
     the ring buffer

   - Correct some stale comments in the ring buffer code

   - Fix kernel-doc in the rv code

   - Add a MODULE_DESCRIPTION to preemptirq_delay_test"

* tag 'trace-fixes-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  rv: Update rv_en(dis)able_monitor doc to match kernel-doc
  tracing: Add MODULE_DESCRIPTION() to preemptirq_delay_test
  ring-buffer: Fix a race between readers and resize checks
  ring-buffer: Correct stale comments related to non-consuming readers
2024-05-23 12:36:38 -07:00
Linus Torvalds
e82d2af501 tracing/tools/latency-collector: Fix printf format warnings
- Use the printf format string with %s to take a string instead of taking
   in a string directly.
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Merge tag 'trace-tools-v6.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing tool fix from Steven Rostedt:
 "Fix printf format warnings in latency-collector.

  Use the printf format string with %s to take a string instead of
  taking in a string directly"

* tag 'trace-tools-v6.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tools/latency-collector: Fix -Wformat-security compile warns
2024-05-23 12:32:15 -07:00
Linus Torvalds
d6a326d694 tracing: Remove second argument of __assign_str()
The __assign_str() macro logic of the TRACE_EVENT() macro was optimized so
 that it no longer needs the second argument. The __assign_str() is always
 matched with __string() field that takes a field name and the source for
 that field:
 
   __string(field, source)
 
 The TRACE_EVENT() macro logic will save off the source value and then use
 that value to copy into the ring buffer via the __assign_str(). Before
 commit c1fa617cae ("tracing: Rework __assign_str() and __string() to not
 duplicate getting the string"), the __assign_str() needed the second
 argument which would perform the same logic as the __string() source
 parameter did. Not only would this add overhead, but it was error prone as
 if the __assign_str() source produced something different, it may not have
 allocated enough for the string in the ring buffer (as the __string()
 source was used to determine how much to allocate)
 
 Now that the __assign_str() just uses the same string that was used in
 __string() it no longer needs the source parameter. It can now be removed.
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Merge tag 'trace-assign-str-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

Pull tracing cleanup from Steven Rostedt:
 "Remove second argument of __assign_str()

  The __assign_str() macro logic of the TRACE_EVENT() macro was
  optimized so that it no longer needs the second argument. The
  __assign_str() is always matched with __string() field that takes a
  field name and the source for that field:

    __string(field, source)

  The TRACE_EVENT() macro logic will save off the source value and then
  use that value to copy into the ring buffer via the __assign_str().

  Before commit c1fa617cae ("tracing: Rework __assign_str() and
  __string() to not duplicate getting the string"), the __assign_str()
  needed the second argument which would perform the same logic as the
  __string() source parameter did. Not only would this add overhead, but
  it was error prone as if the __assign_str() source produced something
  different, it may not have allocated enough for the string in the ring
  buffer (as the __string() source was used to determine how much to
  allocate)

  Now that the __assign_str() just uses the same string that was used in
  __string() it no longer needs the source parameter. It can now be
  removed"

* tag 'trace-assign-str-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tracing/treewide: Remove second parameter of __assign_str()
2024-05-23 12:28:01 -07:00
Linus Torvalds
bca2a25d3b This includes the following changes related to sparc for v6.10:
- Avoid on-stack cpumask variables in a number of places.
 - Move struct termio to asm/termios.h, matching other architectures and
   allowing certain user space applications to build also for sparc.
 - Fix missing prototype warnings for sparc64.
 - Fix version generation warnings for sparc32.
 - Fix bug where non-consecutive CPU IDs lead to some CPUs not starting.
 - Simplification using swap and cleanup using NULL for pointer.
 - Convert sparc parport and chmc drivers to use remove callbacks
   returning void.
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Merge tag 'sparc-for-6.10-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/alarsson/linux-sparc

Pull sparc updates from Andreas Larsson:

 - Avoid on-stack cpumask variables in a number of places

 - Move struct termio to asm/termios.h, matching other architectures and
   allowing certain user space applications to build also for sparc

 - Fix missing prototype warnings for sparc64

 - Fix version generation warnings for sparc32

 - Fix bug where non-consecutive CPU IDs lead to some CPUs not starting

 - Simplification using swap and cleanup using NULL for pointer

 - Convert sparc parport and chmc drivers to use remove callbacks
   returning void

* tag 'sparc-for-6.10-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/alarsson/linux-sparc:
  sparc/leon: Remove on-stack cpumask var
  sparc/pci_msi: Remove on-stack cpumask var
  sparc/of: Remove on-stack cpumask var
  sparc/irq: Remove on-stack cpumask var
  sparc/srmmu: Remove on-stack cpumask var
  sparc: chmc: Convert to platform remove callback returning void
  sparc: parport: Convert to platform remove callback returning void
  sparc: Compare pointers to NULL instead of 0
  sparc: Use swap() to fix Coccinelle warning
  sparc32: Fix version generation failed warnings
  sparc64: Fix number of online CPUs
  sparc64: Fix prototype warning for sched_clock
  sparc64: Fix prototype warnings in adi_64.c
  sparc64: Fix prototype warning for dma_4v_iotsb_bind
  sparc64: Fix prototype warning for uprobe_trap
  sparc64: Fix prototype warning for alloc_irqstack_bootmem
  sparc64: Fix prototype warning for vmemmap_free
  sparc64: Fix prototype warnings in traps_64.c
  sparc64: Fix prototype warning for init_vdso_image
  sparc: move struct termio to asm/termios.h
2024-05-23 12:22:20 -07:00
Linus Torvalds
2b7ced108e arm64 fixes for -rc1
- Fix broken FP register state tracking which resulted in filesystem
   corruption when dm-crypt is used
 
 - Workarounds for Arm CPU errata affecting the SSBS Spectre mitigation
 
 - Fix lockdep assertion in DMC620 memory controller PMU driver
 
 - Fix alignment of BUG table when CONFIG_DEBUG_BUGVERBOSE is disabled
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "The major fix here is for a filesystem corruption issue reported on
  Apple M1 as a result of buggy management of the floating point
  register state introduced in 6.8. I initially reverted one of the
  offending patches, but in the end Ard cooked a proper fix so there's a
  revert+reapply in the series.

  Aside from that, we've got some CPU errata workarounds and misc other
  fixes.

   - Fix broken FP register state tracking which resulted in filesystem
     corruption when dm-crypt is used

   - Workarounds for Arm CPU errata affecting the SSBS Spectre
     mitigation

   - Fix lockdep assertion in DMC620 memory controller PMU driver

   - Fix alignment of BUG table when CONFIG_DEBUG_BUGVERBOSE is
     disabled"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64/fpsimd: Avoid erroneous elide of user state reload
  Reapply "arm64: fpsimd: Implement lazy restore for kernel mode FPSIMD"
  arm64: asm-bug: Add .align 2 to the end of __BUG_ENTRY
  perf/arm-dmc620: Fix lockdep assert in ->event_init()
  Revert "arm64: fpsimd: Implement lazy restore for kernel mode FPSIMD"
  arm64: errata: Add workaround for Arm errata 3194386 and 3312417
  arm64: cputype: Add Neoverse-V3 definitions
  arm64: cputype: Add Cortex-X4 definitions
  arm64: barrier: Restore spec_bar() macro
2024-05-23 12:09:22 -07:00
Linus Torvalds
2ef32ad224 virtio: features, fixes, cleanups
Several new features here:
 
 - virtio-net is finally supported in vduse.
 
 - Virtio (balloon and mem) interaction with suspend is improved
 
 - vhost-scsi now handles signals better/faster.
 
 Fixes, cleanups all over the place.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio updates from Michael Tsirkin:
 "Several new features here:

   - virtio-net is finally supported in vduse

   - virtio (balloon and mem) interaction with suspend is improved

   - vhost-scsi now handles signals better/faster

  And fixes, cleanups all over the place"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (48 commits)
  virtio-pci: Check if is_avq is NULL
  virtio: delete vq in vp_find_vqs_msix() when request_irq() fails
  MAINTAINERS: add Eugenio Pérez as reviewer
  vhost-vdpa: Remove usage of the deprecated ida_simple_xx() API
  vp_vdpa: don't allocate unused msix vectors
  sound: virtio: drop owner assignment
  fuse: virtio: drop owner assignment
  scsi: virtio: drop owner assignment
  rpmsg: virtio: drop owner assignment
  nvdimm: virtio_pmem: drop owner assignment
  wifi: mac80211_hwsim: drop owner assignment
  vsock/virtio: drop owner assignment
  net: 9p: virtio: drop owner assignment
  net: virtio: drop owner assignment
  net: caif: virtio: drop owner assignment
  misc: nsm: drop owner assignment
  iommu: virtio: drop owner assignment
  drm/virtio: drop owner assignment
  gpio: virtio: drop owner assignment
  firmware: arm_scmi: virtio: drop owner assignment
  ...
2024-05-23 12:04:36 -07:00
Palmer Dabbelt
88d68bbd07 irqchip/riscv-imsic: Fixup riscv_ipi_set_virq_range() conflict
There was a semantic conflict between 21a8f8a0eb ("irqchip: Add RISC-V
incoming MSI controller early driver") and dc892fb443 ("riscv: Use
IPIs for remote cache/TLB flushes by default") due to an API change.
This manifests as a build failure post-merge.

Fixes: 0bfbc914d9 ("Merge tag 'riscv-for-linus-6.10-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux")
Reported-by: Tomasz Jeznach <tjeznach@rivosinc.com>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240522184953.28531-3-palmer@rivosinc.com
Link: https://lore.kernel.org/all/mhng-10b71228-cf3e-42ca-9abf-5464b15093f1@palmer-ri-x1c9/
2024-05-23 19:57:12 +02:00
Alexandre Ghiti
6ca445d8af
riscv: Fix early ftrace nop patching
Commit c97bf62996 ("riscv: Fix text patching when IPI are used")
converted ftrace_make_nop() to use patch_insn_write() which does not
emit any icache flush relying entirely on __ftrace_modify_code() to do
that.

But we missed that ftrace_make_nop() was called very early directly when
converting mcount calls into nops (actually on riscv it converts 2B nops
emitted by the compiler into 4B nops).

This caused crashes on multiple HW as reported by Conor and Björn since
the booting core could have half-patched instructions in its icache
which would trigger an illegal instruction trap: fix this by emitting a
local flush icache when early patching nops.

Fixes: c97bf62996 ("riscv: Fix text patching when IPI are used")
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reported-by: Conor Dooley <conor.dooley@microchip.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
Tested-by: Björn Töpel <bjorn@rivosinc.com>
Link: https://lore.kernel.org/r/20240523115134.70380-1-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
2024-05-23 08:22:17 -07:00