Gerald Schaefer 04f7ce3f07 mm/debug_vm_pgtable: fix alignment for pmd/pud_advanced_tests() ... In pmd/pud_advanced_tests(), the vaddr is aligned up to the next pmd/pud entry, and so it does not match the given pmdp/pudp and (aligned down) pfn any more. For s390, this results in memory corruption, because the IDTE instruction used e.g. in xxx_get_and_clear() will take the vaddr for some calculations, in combination with the given pmdp. It will then end up with a wrong table origin, ending on ...ff8, and some of those wrongly set low-order bits will also select a wrong pagetable level for the index addition. IDTE could therefore invalidate (or 0x20) something outside of the page tables, depending on the wrongly picked index, which in turn depends on the random vaddr. As result, we sometimes see "BUG task_struct (Not tainted): Padding overwritten" on s390, where one 0x5a padding value got overwritten with 0x7a. Fix this by aligning down, similar to how the pmd/pud_aligned pfns are calculated. Link: https://lkml.kernel.org/r/20210525130043.186290-2-gerald.schaefer@linux.ibm.com Fixes: a5c3b9ffb0 ("mm/debug_vm_pgtable: add tests validating advanced arch page table helpers") Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: <stable@vger.kernel.org> [5.9+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2021-06-05 08:58:11 -07:00
..
kasan	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
kfence	kfence: use TASK_IDLE when awaiting allocation	2021-06-05 08:58:11 -07:00
backing-dev.c	mm/backing-dev.c: use might_alloc()	2021-02-26 09:41:01 -08:00
balloon_compaction.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
cleancache.c
cma.c	mm: use proper type for cma_[alloc|release]	2021-05-05 11:27:24 -07:00
cma.h	mm: cma: support sysfs	2021-05-05 11:27:24 -07:00
cma_debug.c	mm/cma: change cma mutex to irq safe spinlock	2021-05-05 11:27:21 -07:00
cma_sysfs.c	mm: cma: support sysfs	2021-05-05 11:27:24 -07:00
compaction.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
debug.c	mm/debug: improve memcg debugging	2021-02-24 13:38:27 -08:00
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable: fix alignment for pmd/pud_advanced_tests()	2021-06-05 08:58:11 -07:00
dmapool.c	mm/dmapool: switch from strlcpy to strscpy	2021-04-30 11:20:39 -07:00
early_ioremap.c	mm/early_ioremap.c: use __func__ instead of function name	2021-02-26 09:41:02 -08:00
fadvise.c	mm, fadvise: improve the expensive remote LRU cache draining after FADV_DONTNEED	2020-10-13 18:38:29 -07:00
failslab.c
filemap.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
frontswap.c	mm/mempool: minor coding style tweaks	2021-05-05 11:27:27 -07:00
gup.c	Revert "mm/gup: check page posion status for coredump."	2021-05-22 15:09:07 -10:00
gup_test.c	selftests/vm: gup_test: test faulting in kernel, and verify pinnable pages	2021-05-05 11:27:26 -07:00
gup_test.h	selftests/vm: gup_test: fix test flag	2021-05-05 11:27:26 -07:00
highmem.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
hmm.c	mm: do page fault accounting in handle_mm_fault	2020-08-12 10:58:02 -07:00
huge_memory.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
hugetlb.c	mm/hugetlb: fix cow where page writtable in child	2021-05-14 19:41:32 -07:00
hugetlb_cgroup.c	hugetlb: make free_huge_page irq safe	2021-05-05 11:27:22 -07:00
hwpoison-inject.c	mm,hwpoison-inject: don't pin for hwpoison_filter	2020-10-16 11:11:16 -07:00
init-mm.c	mm/gup: prevent gup_fast from racing with COW during fork	2020-12-15 12:13:39 -08:00
internal.h	Revert "mm/gup: check page posion status for coredump."	2021-05-22 15:09:07 -10:00
interval_tree.c	mm/interval_tree: add comments to improve code readability	2021-04-30 11:20:38 -07:00
io-mapping.c	mm: add a io_mapping_map_user helper	2021-04-30 11:20:39 -07:00
ioremap.c	mm/ioremap: fix iomap_max_page_shift	2021-05-14 19:41:32 -07:00
Kconfig	mm,memory_hotplug: allocate memmap from the added memory range	2021-05-05 11:27:26 -07:00
Kconfig.debug	mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO	2020-12-15 12:13:46 -08:00
khugepaged.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
kmemleak.c	mm/kmemleak.c: fix a typo	2021-04-30 11:20:36 -07:00
ksm.c	ksm: revert "use GET_KSM_PAGE_NOLOCK to get ksm page in remove_rmap_item_from_tree()"	2021-05-14 19:41:32 -07:00
list_lru.c	mm: vmscan: consolidate shrinker_maps handling code	2021-05-05 11:27:23 -07:00
maccess.c	uaccess: add force_uaccess_{begin,end} helpers	2020-08-12 10:57:59 -07:00
madvise.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
Makefile	mm,memory_hotplug: add kernel boot option to enable memmap_on_memory	2021-05-05 11:27:27 -07:00
mapping_dirty_helpers.c	mm/mapping_dirty_helpers: guard hugepage pud's usage	2021-04-16 16:10:37 -07:00
memblock.c	memblock: remove return value of memblock_free_all()	2021-02-22 13:01:23 -08:00
memcontrol.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
memfd.c
memory-failure.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
memory.c	Revert "MIPS: make userspace mapping young by default"	2021-06-05 08:58:11 -07:00
memory_hotplug.c	mm/mempool: minor coding style tweaks	2021-05-05 11:27:27 -07:00
mempolicy.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
mempool.c	mm/mempool: minor coding style tweaks	2021-05-05 11:27:27 -07:00
memremap.c	mm/memremap.c: fix improper SPDX comment style	2021-04-30 11:20:37 -07:00
memtest.c
migrate.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
mincore.c	inode: make init and permission helpers idmapped mount aware	2021-01-24 14:27:16 +01:00
mlock.c	mm/mempool: minor coding style tweaks	2021-05-05 11:27:27 -07:00
mm_init.c	include/linux/page-flags-layout.h: cleanups	2021-04-30 11:20:42 -07:00
mmap.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
mmap_lock.c	mm: mmap_lock: add tracepoints around lock acquisition	2020-12-15 12:13:41 -08:00
mmu_gather.c	mm: eliminate "expecting prototype" kernel-doc warnings	2021-04-16 16:10:36 -07:00
mmu_notifier.c	mm/mmu_notifiers: ensure range_end() is paired with range_start()	2021-03-25 09:22:55 -07:00
mmzone.c	mm/lru: replace pgdat lru_lock with lruvec lock	2020-12-15 14:48:04 -08:00
mprotect.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
mremap.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
msync.c	mm/msync: exit early when the flags is an MS_ASYNC and start < vm_start	2021-04-30 11:20:37 -07:00
nommu.c	mm/vmalloc: remove vwrite()	2021-05-07 00:26:34 -07:00
oom_kill.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
page-writeback.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
page_alloc.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
page_counter.c	mm: page_counter: mitigate consequences of a page_counter underflow	2021-04-30 11:20:38 -07:00
page_ext.c	mm: fix some spelling mistakes in comments	2020-12-15 22:46:19 -08:00
page_idle.c	mm: page_idle_get_page() does not need lru_lock	2020-12-15 14:48:03 -08:00
page_io.c	swap: fix swapfile read/write offset	2021-03-02 17:25:46 -07:00
page_isolation.c	mm/page_isolation: do not isolate the max order page	2020-12-15 12:13:45 -08:00
page_owner.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
page_poison.c	mm: page_poison: print page info when corruption is caught	2021-04-30 11:20:36 -07:00
page_reporting.c	mm/page_reporting: use list_entry_is_head() in page_reporting_cycle()	2021-02-24 13:38:30 -08:00
page_reporting.h
page_vma_mapped.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
pagewalk.c	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
percpu-internal.h	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
percpu-km.c	mm: memcg/percpu: account percpu memory to memory cgroups	2020-08-12 10:57:55 -07:00
percpu-stats.c	percpu: make pcpu_nr_empty_pop_pages per chunk type	2021-04-09 13:58:38 +00:00
percpu-vm.c	mm/vmalloc: remove unmap_kernel_range	2021-04-30 11:20:40 -07:00
percpu.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
pgalloc-track.h	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
pgtable-generic.c	mm/pgtable-generic.c: optimize the VM_BUG_ON condition in pmdp_huge_clear_flush()	2021-02-24 13:38:30 -08:00
process_vm_access.c	mm/process_vm_access.c: remove duplicate include	2021-05-05 11:27:27 -07:00
ptdump.c	mm: ptdump: fix build failure	2021-04-16 16:10:37 -07:00
readahead.c	mm: Implement readahead_control pageset expansion	2021-04-23 10:14:29 +01:00
rmap.c	mm: fix some typos and code style problems	2021-05-07 00:26:33 -07:00
rodata_test.c	mm/rodata_test.c: fix missing function declaration	2020-08-21 09:52:53 -07:00
shmem.c	userfaultfd: release page in error path to avoid BUG_ON	2021-05-14 19:41:32 -07:00
shuffle.c	mm: eliminate "expecting prototype" kernel-doc warnings	2021-04-16 16:10:36 -07:00
shuffle.h	mm/shuffle: fix section mismatch warning	2021-05-22 15:09:07 -10:00
slab.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
slab.h	kasan, mm: integrate slab init_on_alloc with HW_TAGS	2021-04-30 11:20:41 -07:00
slab_common.c	mm, slub: move slub_debug static key enabling outside slab_mutex	2021-05-14 19:41:32 -07:00
slob.c	mm: Don't build mm_dump_obj() on CONFIG_PRINTK=n kernels	2021-03-08 14:18:46 -08:00
slub.c	kasan: slab: always reset the tag in get_freepointer_safe()	2021-05-22 15:09:07 -10:00
sparse-vmemmap.c	mm/sparse: only sub-section aligned range would be populated	2020-08-07 11:33:27 -07:00
sparse.c	mm/mempool: minor coding style tweaks	2021-05-05 11:27:27 -07:00
swap.c	mm: fix some typos and code style problems	2021-05-07 00:26:33 -07:00
swap_cgroup.c
swap_slots.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
swap_state.c	mm: fix some typos and code style problems	2021-05-07 00:26:33 -07:00
swapfile.c	mm/mempool: minor coding style tweaks	2021-05-05 11:27:27 -07:00
truncate.c	mm: stop accounting shadow entries	2021-05-05 11:27:19 -07:00
usercopy.c	mm/usercopy.c: delete duplicated word	2020-08-12 10:57:58 -07:00
userfaultfd.c	userfaultfd: hugetlbfs: fix new flag usage in error path	2021-05-22 15:09:07 -10:00
util.c	mm/util.c: fix typo	2021-05-05 11:27:25 -07:00
vmacache.c	kernel: better document the use_mm/unuse_mm API contract	2020-06-10 19:14:18 -07:00
vmalloc.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
vmpressure.c
vmscan.c	mm/mempool: minor coding style tweaks	2021-05-05 11:27:27 -07:00
vmstat.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
workingset.c	mm: stop accounting shadow entries	2021-05-05 11:27:19 -07:00
z3fold.c	mm: fix some typos and code style problems	2021-05-07 00:26:33 -07:00
zbud.c	mm: set the sleep_mapped to true for zbud and z3fold	2021-02-26 09:41:01 -08:00
zpool.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
zsmalloc.c	mm: fix typos in comments	2021-05-07 00:26:35 -07:00
zswap.c	mm/zswap.c: switch from strlcpy to strscpy	2021-05-05 11:27:27 -07:00