Commit graph

826628 commits

Author SHA1 Message Date
Dave Airlie
a0cecc23cf Revert "drm/virtio: drop prime import/export callbacks"
This patch does more harm than good, as it breaks both Xwayland and
gnome-shell with X11.

Xwayland requires DRI3 & DRI3 requires PRIME.

X11 crash for obscure double-free reason which are hard to debug
(starting X11 by hand doesn't trigger the crash).

I don't see an apparent problem implementing those stub prime
functions, they may return an error at run-time, and it seems to be
handled fine by GNOME at least.

This reverts commit b318e3ff7c.
[airlied:
This broke userspace for virtio-gpus, and regressed things from DRI3 to DRI2.

This brings back the original problem, but it's better than regressions.]

Fixes: b318e3ff7c ("drm/virtio: drop prime import/export callbacks")
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
2019-04-24 10:52:52 +10:00
Dave Airlie
9fa246256e Revert "drm/i915/fbdev: Actually configure untiled displays"
This reverts commit d179b88deb.

This commit is documented to break userspace X.org modesetting driver in certain configurations.

The X.org modesetting userspace driver is broken. No fixes are available yet. In order for this patch to be applied it either needs a config option or a workaround developed.

This has been reported a few times, saying it's a userspace problem is clearly against the regression rules.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=109806
Signed-off-by: Dave Airlie <airlied@redhat.com>
Cc: <stable@vger.kernel.org> # v3.19+
2019-04-24 10:47:56 +10:00
Linus Torvalds
12a54b150f Fix miscellaneous nfsd bugs, in NFSv4.1 callbacks, NFSv4.1
lock-notification callbacks, NFSv3 readdir encoding, and the
 cache/upcall code.
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Merge tag 'nfsd-5.1-1' of git://linux-nfs.org/~bfields/linux

Pull nfsd bugfixes from Bruce Fields:
 "Fix miscellaneous nfsd bugs, in NFSv4.1 callbacks, NFSv4.1
  lock-notification callbacks, NFSv3 readdir encoding, and the
  cache/upcall code"

* tag 'nfsd-5.1-1' of git://linux-nfs.org/~bfields/linux:
  nfsd: wake blocked file lock waiters before sending callback
  nfsd: wake waiters blocked on file_lock before deleting it
  nfsd: Don't release the callback slot unless it was actually held
  nfsd/nfsd3_proc_readdir: fix buffer count and page pointers
  sunrpc: don't mark uninitialised items as VALID.
2019-04-23 13:40:55 -07:00
Linus Torvalds
d286e13d53 arch: add pidfd and io_uring syscalls everywhere
This comes a bit late, but should be in 5.1 anyway: we want the newly
 added system calls to be synchronized across all architectures in
 the release.
 
 I hope that in the future, any newly added system calls can be added
 to all architectures at the same time, and tested there while they
 are in linux-next, avoiding dependencies between the architecture
 maintainer trees and the tree that contains the new system call.
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Merge tag 'syscalls-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull syscall numbering updates from Arnd Bergmann:
 "arch: add pidfd and io_uring syscalls everywhere

  This comes a bit late, but should be in 5.1 anyway: we want the newly
  added system calls to be synchronized across all architectures in the
  release.

  I hope that in the future, any newly added system calls can be added
  to all architectures at the same time, and tested there while they are
  in linux-next, avoiding dependencies between the architecture
  maintainer trees and the tree that contains the new system call"

* tag 'syscalls-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
  arch: add pidfd and io_uring syscalls everywhere
2019-04-23 13:34:17 -07:00
Yan, Zheng
37659182bf ceph: fix ci->i_head_snapc leak
We missed two places that i_wrbuffer_ref_head, i_wr_ref, i_dirty_caps
and i_flushing_caps may change. When they are all zeros, we should free
i_head_snapc.

Cc: stable@vger.kernel.org
Link: https://tracker.ceph.com/issues/38224
Reported-and-tested-by: Luis Henriques <lhenriques@suse.com>
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-04-23 21:37:54 +02:00
Jeff Layton
4b82228700 ceph: handle the case where a dentry has been renamed on outstanding req
It's possible for us to issue a lookup to revalidate a dentry
concurrently with a rename. If done in the right order, then we could
end up processing dentry info in the reply that no longer reflects the
state of the dentry.

If req->r_dentry->d_name differs from the one in the trace, then just
ignore the trace in the reply. We only need to do this however if the
parent's i_rwsem is not held.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-04-23 21:37:54 +02:00
Jeff Layton
76a495d666 ceph: ensure d_name stability in ceph_dentry_hash()
Take the d_lock here to ensure that d_name doesn't change.

Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-04-23 21:37:54 +02:00
Jeff Layton
1bcb344086 ceph: only use d_name directly when parent is locked
Ben reported tripping the BUG_ON in create_request_message during some
performance testing. Analysis of the vmcore showed that the length of
the r_dentry->d_name string changed after we allocated the buffer, but
before we encoded it.

build_dentry_path returns pointers to d_name in the common case of
non-snapped dentries, but this optimization isn't safe unless the parent
directory is locked. When it isn't, have the code make a copy of the
d_name while holding the d_lock.

Cc: stable@vger.kernel.org
Reported-by: Ben England <bengland@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
2019-04-23 21:37:54 +02:00
Daniel Gomez
d04830531d spi: ST ST95HF NFC: declare missing of table
Add missing <of_device_id> table for SPI driver relying on SPI
device match since compatible is in a DT binding or in a DTS.

Before this patch:
modinfo drivers/nfc/st95hf/st95hf.ko | grep alias
alias:          spi:st95hf

After this patch:
modinfo drivers/nfc/st95hf/st95hf.ko | grep alias
alias:          spi:st95hf
alias:          of:N*T*Cst,st95hfC*
alias:          of:N*T*Cst,st95hf

Reported-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Daniel Gomez <dagmcr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-23 10:44:44 -07:00
Daniel Gomez
2f23a2a768 spi: Micrel eth switch: declare missing of table
Add missing <of_device_id> table for SPI driver relying on SPI
device match since compatible is in a DT binding or in a DTS.

Before this patch:
modinfo drivers/net/phy/spi_ks8995.ko | grep alias
alias:          spi:ksz8795
alias:          spi:ksz8864
alias:          spi:ks8995

After this patch:
modinfo drivers/net/phy/spi_ks8995.ko | grep alias
alias:          spi:ksz8795
alias:          spi:ksz8864
alias:          spi:ks8995
alias:          of:N*T*Cmicrel,ksz8795C*
alias:          of:N*T*Cmicrel,ksz8795
alias:          of:N*T*Cmicrel,ksz8864C*
alias:          of:N*T*Cmicrel,ksz8864
alias:          of:N*T*Cmicrel,ks8995C*
alias:          of:N*T*Cmicrel,ks8995

Reported-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Daniel Gomez <dagmcr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-23 10:44:44 -07:00
Ard Biesheuvel
e17b1af96b ARM: 8857/1: efi: enable CP15 DMB instructions before cleaning the cache
The EFI stub is entered with the caches and MMU enabled by the
firmware, and once the stub is ready to hand over to the decompressor,
we clean and disable the caches.

The cache clean routines use CP15 barrier instructions, which can be
disabled via SCTLR. Normally, when using the provided cache handling
routines to enable the caches and MMU, this bit is enabled as well.
However, but since we entered the stub with the caches already enabled,
this routine is not executed before we call the cache clean routines,
resulting in undefined instruction exceptions if the firmware never
enabled this bit.

So set the bit explicitly in the EFI entry code, but do so in a way that
guarantees that the resulting code can still run on v6 cores as well
(which are guaranteed to have CP15 barriers enabled)

Cc: <stable@vger.kernel.org> # v4.9+
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2019-04-23 17:28:37 +01:00
Tigran Tadevosyan
c314396780 ARM: 8856/1: NOMMU: Fix CCR register faulty initialization when MPU is disabled
When CONFIG_ARM_MPU is not defined, the base address of v7M SCB register
is not initialized with correct value. This prevents enabling I/D caches
when the L1 cache poilcy is applied in kernel.

Fixes: 3c24121039 ("ARM: 8756/1: NOMMU: Postpone MPU activation till __after_proc_init")
Signed-off-by: Tigran Tadevosyan <tigran.tadevosyan@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2019-04-23 17:28:37 +01:00
Russell King
503621628b ARM: fix function graph tracer and unwinder dependencies
Naresh Kamboju recently reported that the function-graph tracer crashes
on ARM. The function-graph tracer assumes that the kernel is built with
frame pointers.

We explicitly disabled the function-graph tracer when building Thumb2,
since the Thumb2 ABI doesn't have frame pointers.

We recently changed the way the unwinder method was selected, which
seems to have made it more likely that we can end up with the function-
graph tracer enabled but without the kernel built with frame pointers.

Fix up the function graph tracer dependencies so the option is not
available when we have no possibility of having frame pointers, and
adjust the dependencies on the unwinder option to hide the non-frame
pointer unwinder options if the function-graph tracer is enabled.

Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
2019-04-23 17:28:32 +01:00
Jonathan Neuschäfer
f5d356328d drm/sched: Fix description of drm_sched_stop
Since commit 222b5f0441 ("drm/sched: Refactor ring mirror list
handling."), drm_sched_hw_job_reset is no longer there, so let's adjust
the doc comment accordingly.

Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2019-04-23 11:15:38 -05:00
Jens Axboe
8358e3a826 io_uring: remove 'state' argument from io_{read,write} path
Since commit 09bb839434 we don't use the state argument for any sort
of on-stack caching in the io read and write path. Remove the stale
and unused argument from them, and bubble it up to __io_submit_sqe()
and down to io_prep_rw().

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-23 08:17:58 -06:00
Lucas Stach
7bcde275eb drm/imx: don't skip DP channel disable for background plane
In order to make sure that the plane color space gets reset correctly.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2019-04-23 14:54:22 +02:00
Lucas Stach
d4fad0a426 gpu: ipu-v3: dp: fix CSC handling
Initialize the flow input colorspaces to unknown and reset to that value
when the channel gets disabled. This avoids the state getting mixed up
with a previous mode.

Also keep the CSC settings for the background flow intact when disabling
the foreground flow.

Root-caused-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
2019-04-23 14:54:16 +02:00
Ard Biesheuvel
4e69ecf4da arm64/module: ftrace: deal with place relative nature of PLTs
Another bodge for the ftrace PLT code: plt_entries_equal() now takes
the place relative nature of the ADRP/ADD based PLT entries into
account, which means that a struct trampoline instance on the stack
is no longer equal to the same set of opcodes in the module struct,
given that they don't point to the same place in memory anymore.

Work around this by using memcmp() in the ftrace PLT handling code.

Acked-by: Will Deacon <will.deacon@arm.com>
Tested-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-04-23 13:35:00 +01:00
Bjorn Andersson
d4d18e3ec6 arm64: mm: Ensure tail of unaligned initrd is reserved
In the event that the start address of the initrd is not aligned, but
has an aligned size, the base + size will not cover the entire initrd
image and there is a chance that the kernel will corrupt the tail of the
image.

By aligning the end of the initrd to a page boundary and then
subtracting the adjusted start address the memblock reservation will
cover all pages that contains the initrd.

Fixes: c756c592e4 ("arm64: Utilize phys_initrd_start/phys_initrd_size")
Cc: stable@vger.kernel.org
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-04-23 10:56:24 +01:00
Achim Dahlhoff
6e7da74775 dmaengine: sh: rcar-dmac: Fix glitch in dmaengine_tx_status
The tx_status poll in the rcar_dmac driver reads the status register
which indicates which chunk is busy (DMACHCRB). Afterwards the point
inside the chunk is read from DMATCRB. It is possible that the chunk
has changed between the two reads. The result is a non-monotonous
increase of the residue. Fix this by introducing a 'safe read' logic.

Fixes: 73a47bd0da ("dmaengine: rcar-dmac: use TCRB instead of TCR for residue")
Signed-off-by: Achim Dahlhoff <Achim.Dahlhoff@de.bosch.com>
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: <stable@vger.kernel.org> # v4.16+
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-04-23 10:45:34 +05:30
Dirk Behme
907bd68a2e dmaengine: sh: rcar-dmac: With cyclic DMA residue 0 is valid
Having a cyclic DMA, a residue 0 is not an indication of a completed
DMA. In case of cyclic DMA make sure that dma_set_residue() is called
and with this a residue of 0 is forwarded correctly to the caller.

Fixes: 3544d28788 ("dmaengine: rcar-dmac: use result of updated get_residue in tx_status")
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Achim Dahlhoff <Achim.Dahlhoff@de.bosch.com>
Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Yao Lihua <ylhuajnu@outlook.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: <stable@vger.kernel.org> # v4.8+
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-04-23 10:45:26 +05:30
Stefan Wahren
f147384774 dmaengine: bcm2835: Avoid GFP_KERNEL in device_prep_slave_sg
The commit af19b7ce76 ("mmc: bcm2835: Avoid possible races on
data requests") introduces a possible circular locking dependency,
which is triggered by swapping to the sdhost interface.

So instead of reintroduce the race condition again, we could also
avoid this situation by using GFP_NOWAIT for the allocation of the
DMA buffer descriptors.

Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: af19b7ce76 ("mmc: bcm2835: Avoid possible races on data requests")
Link: http://lists.infradead.org/pipermail/linux-rpi-kernel/2019-March/008615.html
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2019-04-23 10:43:54 +05:30
Vinod Koul
b561af36b1 net: stmmac: move stmmac_check_ether_addr() to driver probe
stmmac_check_ether_addr() checks the MAC address and assigns one in
driver open(). In many cases when we create slave netdevice, the dev
addr is inherited from master but the master dev addr maybe NULL at
that time, so move this call to driver probe so that address is
always valid.

Signed-off-by: Xiaofei Shen <xiaofeis@codeaurora.org>
Tested-by: Xiaofei Shen <xiaofeis@codeaurora.org>
Signed-off-by: Sneh Shah <snehshah@codeaurora.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-22 21:52:18 -07:00
David S. Miller
acced9d2b4 Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
Pablo Neira Ayuso says:

====================
Netfilter/IPVS fixes for net

The following patchset contains Netfilter/IPVS fixes for your net tree:

1) Add a selftest for icmp packet too big errors with conntrack, from
   Florian Westphal.

2) Validate inner header in ICMP error message does not lie to us
   in conntrack, also from Florian.

3) Initialize ct->timeout to calm down KASAN, from Alexander Potapenko.

4) Skip ICMP error messages from tunnels in IPVS, from Julian Anastasov.

5) Use a hash to expose conntrack and expectation ID, from Florian Westphal.

6) Prevent shift wrap in nft_chain_parse_hook(), from Dan Carpenter.

7) Fix broken ICMP ID randomization with NAT, also from Florian.

8) Remove WARN_ON in ebtables compat that is reached via syzkaller,
   from Florian Westphal.

9) Fix broken timestamps since fb420d5d91 ("tcp/fq: move back to
   CLOCK_MONOTONIC"), from Florian.

10) Fix logging of invalid packets in conntrack, from Andrei Vagin.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-22 21:23:55 -07:00
Jeff Layton
f456458e4d nfsd: wake blocked file lock waiters before sending callback
When a blocked NFS lock is "awoken" we send a callback to the server and
then wake any hosts waiting on it. If a client attempts to get a lock
and then drops off the net, we could end up waiting for a long time
until we end up waking locks blocked on that request.

So, wake any other waiting lock requests before sending the callback.
Do this by calling locks_delete_block in a new "prepare" phase for
CB_NOTIFY_LOCK callbacks.

URL: https://bugzilla.kernel.org/show_bug.cgi?id=203363
Fixes: 16306a61d3 ("fs/locks: always delete_block after waiting.")
Reported-by: Slawomir Pryczek <slawek1211@gmail.com>
Cc: Neil Brown <neilb@suse.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-04-22 15:38:41 -04:00
Jeff Layton
6aaafc43a4 nfsd: wake waiters blocked on file_lock before deleting it
After a blocked nfsd file_lock request is deleted, knfsd will send a
callback to the client and then free the request. Commit 16306a61d3
("fs/locks: always delete_block after waiting.") changed it such that
locks_delete_block is always called on a request after it is awoken,
but that patch missed fixing up blocked nfsd request handling.

Call locks_delete_block on the block to wake up any locks still blocked
on the nfsd lock request before freeing it. Some of its callers already
do this however, so just remove those calls.

URL: https://bugzilla.kernel.org/show_bug.cgi?id=203363
Fixes: 16306a61d3 ("fs/locks: always delete_block after waiting.")
Reported-by: Slawomir Pryczek <slawek1211@gmail.com>
Cc: Neil Brown <neilb@suse.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2019-04-22 15:31:54 -04:00
Linus Torvalds
7142eaa58b A couple more MIPS fixes:
- Fix indirect syscall tracing & seccomp filtering for big endian MIPS64
   kernels, which previously loaded the syscall number incorrectly &
   would always use zero.
 
 - Fix performance counter IRQ setup for Atheros/ath79 SoCs, allowing
   perf to function on those systems.
 
 And not really a fix, but a useful addition:
 
 - Add a Broadcom mailing list to the MAINTAINERS entry for BMIPS systems
   to allow relevant engineers to track patch submissions.
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Merge tag 'mips_fixes_5.1_3' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS fixes from Paul Burton:
 "A couple more MIPS fixes:

   - Fix indirect syscall tracing & seccomp filtering for big endian
     MIPS64 kernels, which previously loaded the syscall number
     incorrectly & would always use zero.

   - Fix performance counter IRQ setup for Atheros/ath79 SoCs, allowing
     perf to function on those systems.

  And not really a fix, but a useful addition:

   - Add a Broadcom mailing list to the MAINTAINERS entry for BMIPS
     systems to allow relevant engineers to track patch submissions"

* tag 'mips_fixes_5.1_3' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: perf: ath79: Fix perfcount IRQ assignment
  MIPS: scall64-o32: Fix indirect syscall number load
  MAINTAINERS: BMIPS: Add internal Broadcom mailing list
2019-04-22 11:54:47 -07:00
Stefan Bühler
fb775faa9e io_uring: fix poll full SQ detection
io_uring_poll shouldn't signal EPOLLOUT | EPOLLWRNORM if the queue is
full; the old check would always signal EPOLLOUT | EPOLLWRNORM (unless
there were U32_MAX - 1 entries in the SQ queue).

Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-22 11:00:58 -06:00
Stefan Bühler
0d7bae69c5 io_uring: fix race condition when sq threads goes sleeping
Reading the SQ tail needs to come after setting IORING_SQ_NEED_WAKEUP in
flags; there is no cheap barrier for ordering a store before a load, a
full memory barrier is required.

Userspace needs a full memory barrier between updating SQ tail and
checking for the IORING_SQ_NEED_WAKEUP too.

Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-22 11:00:56 -06:00
Stefan Bühler
e523a29c4f io_uring: fix race condition reading SQ entries
A read memory barrier is required between reading SQ tail and reading
the actual data belonging to the SQ entry.

Userspace needs a matching write barrier between writing SQ entries and
updating SQ tail (using smp_store_release to update tail will do).

Signed-off-by: Stefan Bühler <source@stbuehler.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-22 11:00:55 -06:00
Jens Axboe
35fa71a030 io_uring: fail io_uring_register(2) on a dying io_uring instance
If we have multiple threads doing io_uring_register(2) on an io_uring
fd, then we can potentially try and kill the percpu reference while
someone else has already killed it.

Prevent this race by failing io_uring_register(2) if the ref is marked
dying. This is safe since we're inside the io_uring mutex.

Fixes: b19062a567 ("io_uring: fix possible deadlock between io_uring_{enter,register}")
Reported-by: syzbot <syzbot+10d25e23199614b7721f@syzkaller.appspotmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-04-22 10:37:07 -06:00
Borislav Petkov
36f0c42355 x86/boot: Disable RSDP parsing temporarily
The original intention to move RDSP parsing very early, before KASLR
does its ranges selection, was to accommodate movable memory regions
machines (CONFIG_MEMORY_HOTREMOVE) to still be able to do memory
hotplug.

However, that broke kexec'ing a kernel on EFI machines because depending
on where the EFI systab was mapped, on at least one machine it isn't
present in the kexec mapping of the second kernel, leading to a triple
fault in the early code.

Fixing this properly requires significantly involved surgery and we
cannot allow ourselves to do that, that close to the merge window.

So disable the RSDP parsing code temporarily until it is fixed properly
in the next release cycle.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Chao Fan <fanc.fnst@cn.fujitsu.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: indou.takao@jp.fujitsu.com
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: kasong@redhat.com
Cc: Kees Cook <keescook@chromium.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: msys.mizuma@gmail.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190419141952.GE10324@zn.tnic
2019-04-22 11:36:43 +02:00
Andrei Vagin
d48668052b netfilter: fix nf_l4proto_log_invalid to log invalid packets
It doesn't log a packet if sysctl_log_invalid isn't equal to protonum
OR sysctl_log_invalid isn't equal to IPPROTO_RAW. This sentence is
always true. I believe we need to replace OR to AND.

Cc: Florian Westphal <fw@strlen.de>
Fixes: c4f3db1595 ("netfilter: conntrack: add and use nf_l4proto_log_invalid")
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-04-22 10:38:50 +02:00
Florian Westphal
916f6efae6 netfilter: never get/set skb->tstamp
setting net.netfilter.nf_conntrack_timestamp=1 breaks xmit with fq
scheduler.  skb->tstamp might be "refreshed" using ktime_get_real(),
but fq expects CLOCK_MONOTONIC.

This patch removes all places in netfilter that check/set skb->tstamp:

1. To fix the bogus "start" time seen with conntrack timestamping for
   outgoing packets, never use skb->tstamp and always use current time.
2. In nfqueue and nflog, only use skb->tstamp for incoming packets,
   as determined by current hook (prerouting, input, forward).
3. xt_time has to use system clock as well rather than skb->tstamp.
   We could still use skb->tstamp for prerouting/input/foward, but
   I see no advantage to make this conditional.

Fixes: fb420d5d91 ("tcp/fq: move back to CLOCK_MONOTONIC")
Cc: Eric Dumazet <edumazet@google.com>
Reported-by: Michal Soltys <soltys@ziu.info>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-04-22 10:34:30 +02:00
Florian Westphal
7caa56f006 netfilter: ebtables: CONFIG_COMPAT: drop a bogus WARN_ON
It means userspace gave us a ruleset where there is some other
data after the ebtables target but before the beginning of the next rule.

Fixes: 81e675c227 ("netfilter: ebtables: add CONFIG_COMPAT support")
Reported-by: syzbot+659574e7bcc7f7eb4df7@syzkaller.appspotmail.com
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2019-04-22 10:34:30 +02:00
Corentin Labbe
26d1b8586b Documentation: decnet: remove reference to CONFIG_DECNET_ROUTE_FWMARK
CONFIG_DECNET_ROUTE_FWMARK was removed in commit 47dcf0cb10 ("[NET]: Rethink mark field in struct flowi")
Since nothing replace it (and nothindg need to replace it, simply remove
it from documentation.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-21 11:25:11 -07:00
Corentin Labbe
39420fe04f dt-bindings: add an explanation for internal phy-mode
When working on the Allwinner internal PHY, the first work was to use
the "internal" mode, but some answer was made my mail on what are really
internal mean for PHY.

This patch write that in the doc.

Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-21 11:24:08 -07:00
Linus Torvalds
085b775580 Linux 5.1-rc6 2019-04-21 10:45:57 -07:00
Jakub Kicinski
12c7686111 net/tls: don't leak IV and record seq when offload fails
When device refuses the offload in tls_set_device_offload_rx()
it calls tls_sw_free_resources_rx() to clean up software context
state.

Unfortunately, tls_sw_free_resources_rx() does not free all
the state tls_set_sw_offload() allocated - it leaks IV and
sequence number buffers.  All other code paths which lead to
tls_sw_release_resources_rx() (which tls_sw_free_resources_rx()
calls) free those right before the call.

Avoid the leak by moving freeing of iv and rec_seq into
tls_sw_release_resources_rx().

Fixes: 4799ac81e5 ("tls: Add rx inline crypto offload")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-20 20:36:51 -07:00
Jakub Kicinski
62ef81d563 net/tls: avoid potential deadlock in tls_set_device_offload_rx()
If device supports offload, but offload fails tls_set_device_offload_rx()
will call tls_sw_free_resources_rx() which (unhelpfully) releases
and reacquires the socket lock.

For a small fix release and reacquire the device_offload_lock.

Fixes: 4799ac81e5 ("tls: Add rx inline crypto offload")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-20 20:35:28 -07:00
Po-Hsu Lin
8c03557c3f selftests/net: correct the return value for run_afpackettests
The run_afpackettests will be marked as passed regardless the return
value of those sub-tests in the script:
    --------------------
    running psock_tpacket test
    --------------------
    [FAIL]
    selftests: run_afpackettests [PASS]

Fix this by changing the return value for each tests.

Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-20 20:29:02 -07:00
Linus Torvalds
9e5de623a0 NFS client bugfixes for Linux 5.1
Highlights include:
 
 Bugfixes:
 - Fix a regression in which an RPC call can be tagged with an error despite
   the transmission being successful
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Merge tag 'nfs-for-5.1-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfix from Trond Myklebust:
 "Fix a regression in which an RPC call can be tagged with an error
  despite the transmission being successful"

* tag 'nfs-for-5.1-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: Ignore queue transmission errors on successful transmission
2019-04-20 12:55:23 -07:00
Linus Torvalds
a06bc2f241 SCSI fixes on 20190420
Three minor fixes: two obvious ones in drivers and a fix to the SG_IO
 path to correctly return status on error.
 
 Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Three minor fixes: two obvious ones in drivers and a fix to the SG_IO
  path to correctly return status on error"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: aic7xxx: fix EISA support
  Revert "scsi: fcoe: clear FC_RP_STARTED flags when receiving a LOGO"
  scsi: core: set result when the command cannot be dispatched
2019-04-20 12:52:23 -07:00
Linus Torvalds
38a2ca2cac for-linus-20190420
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Merge tag 'for-linus-20190420' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A set of small fixes that should go into this series. This contains:

   - Removal of unused queue member (Hou)

   - Overflow bvec fix (Ming)

   - Various little io_uring tweaks (me)
       - kthread parking
       - Only call cpu_possible() for verified CPU
       - Drop unused 'file' argument to io_file_put()
       - io_uring_enter vs io_uring_register deadlock fix
       - CQ overflow fix

   - BFQ internal depth update fix (me)"

* tag 'for-linus-20190420' of git://git.kernel.dk/linux-block:
  block: make sure that bvec length can't be overflow
  block: kill all_q_node in request_queue
  io_uring: fix CQ overflow condition
  io_uring: fix possible deadlock between io_uring_{enter,register}
  io_uring: drop io_file_put() 'file' argument
  bfq: update internal depth state when queue depth changes
  io_uring: only test SQPOLL cpu after we've verified it
  io_uring: park SQPOLL thread if it's percpu
2019-04-20 12:20:58 -07:00
Linus Torvalds
34396bdfd2 - Fix the random PID check
- Fix the disable controller logic in the designware driver
 - Fix I3C entry in MAINTAINERS
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Merge tag 'i3c/fixes-for-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux

Pill i3c fixes from Boris Brezillon:

 - fix the random PID check

 - fix the disable controller logic in the designware driver

 - fix I3C entry in MAINTAINERS

* tag 'i3c/fixes-for-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux:
  MAINTAINERS: Fix the I3C entry
  i3c: dw: Fix dw_i3c_master_disable controller by using correct mask
  i3c: Fix the verification of random PID
2019-04-20 10:43:37 -07:00
Linus Torvalds
4b609f1e26 sound fixes for 5.1-rc6
Two core fixes for long-standing bugs for the races at concurrent
 device creation and deletion that were (unsurprisingly) spotted by
 syzkaller with usb-fuzzer.  The rest are usual small HD-audio fixes.
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Merge tag 'sound-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Two core fixes for long-standing bugs for the races at concurrent
  device creation and deletion that were (unsurprisingly) spotted by
  syzkaller with usb-fuzzer.

  The rest are usual small HD-audio fixes"

* tag 'sound-5.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda/realtek - add two more pin configuration sets to quirk table
  ALSA: core: Fix card races between register and disconnect
  ALSA: info: Fix racy addition/deletion of nodes
  ALSA: hda: Initialize power_state field properly
2019-04-20 10:19:30 -07:00
Linus Torvalds
e899cc3b3d Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
 "Misc clocksource driver fixes, and a sched-clock wrapping fix"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  timers/sched_clock: Prevent generic sched_clock wrap caused by tick_freeze()
  clocksource/drivers/timer-ti-dm: Remove omap_dm_timer_set_load_start
  clocksource/drivers/oxnas: Fix OX820 compatible
  clocksource/drivers/arm_arch_timer: Remove unneeded pr_fmt macro
  clocksource/drivers/npcm: select TIMER_OF
2019-04-20 10:10:49 -07:00
Linus Torvalds
b25c69b9d5 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
 "Misc fixes:
   - various tooling fixes
   - kretprobe fixes
   - kprobes annotation fixes
   - kprobes error checking fix
   - fix the default events for AMD Family 17h CPUs
   - PEBS fix
   - AUX record fix
   - address filtering fix"

* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/kprobes: Avoid kretprobe recursion bug
  kprobes: Mark ftrace mcount handler functions nokprobe
  x86/kprobes: Verify stack frame on kretprobe
  perf/x86/amd: Add event map for AMD Family 17h
  perf bpf: Return NULL when RB tree lookup fails in perf_env__find_btf()
  perf tools: Fix map reference counting
  perf evlist: Fix side band thread draining
  perf tools: Check maps for bpf programs
  perf bpf: Return NULL when RB tree lookup fails in perf_env__find_bpf_prog_info()
  tools include uapi: Sync sound/asound.h copy
  perf top: Always sample time to satisfy needs of use of ordered queuing
  perf evsel: Use hweight64() instead of hweight_long(attr.sample_regs_user)
  tools lib traceevent: Fix missing equality check for strcmp
  perf stat: Disable DIR_FORMAT feature for 'perf stat record'
  perf scripts python: export-to-sqlite.py: Fix use of parent_id in calls_view
  perf header: Fix lock/unlock imbalances when processing BPF/BTF info
  perf/x86: Fix incorrect PEBS_REGS
  perf/ring_buffer: Fix AUX record suppression
  perf/core: Fix the address filtering fix
  kprobes: Fix error check when reusing optimized probes
2019-04-20 10:05:02 -07:00
Linus Torvalds
1fd91d719e Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Misc fixes all over the place: a console spam fix, section attributes
  fixes, a KASLR fix, a TLB stack-variable alignment fix, a reboot
  quirk, boot options related warnings fix, an LTO fix, a deadlock fix
  and an RDT fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpu/intel: Lower the "ENERGY_PERF_BIAS: Set to normal" message's log priority
  x86/cpu/bugs: Use __initconst for 'const' init data
  x86/mm/KASLR: Fix the size of the direct mapping section
  x86/Kconfig: Fix spelling mistake "effectivness" -> "effectiveness"
  x86/mm/tlb: Revert "x86/mm: Align TLB invalidation info"
  x86/reboot, efi: Use EFI reboot for Acer TravelMate X514-51T
  x86/mm: Prevent bogus warnings with "noexec=off"
  x86/build/lto: Fix truncated .bss with -fdata-sections
  x86/speculation: Prevent deadlock on ssb_state::lock
  x86/resctrl: Do not repeat rdtgroup mode initialization
2019-04-20 10:01:11 -07:00
Linus Torvalds
2b4cf5850d Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
 "A deadline scheduler warning/race fix, and a cfs_period_us quota
  calculation workaround where the real fix looks too involved to merge
  immediately"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched/deadline: Correctly handle active 0-lag timers
  sched/fair: Limit sched_cfs_period_timer() loop to avoid hard lockup
2019-04-20 09:53:36 -07:00