When CONFIG_THREAD_INFO_IN_TASK=y, it is possible that an exited thread
remains in the task list after its stack pointer was already set to NULL.
Therefore, thread_saved_pc() and stack_not_used() in sched_show_task()
will trigger NULL pointer dereference if an attempt to dump such thread's
traces (e.g. SysRq-t, khungtaskd) is made.
Since show_stack() in sched_show_task() calls try_get_task_stack() and
sched_show_task() is called from interrupt context, calling
try_get_task_stack() from sched_show_task() will be safe as well.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bp@alien8.de
Cc: brgerst@gmail.com
Cc: jann@thejh.net
Cc: keescook@chromium.org
Cc: linux-api@vger.kernel.org
Cc: tycho.andersen@canonical.com
Link: http://lkml.kernel.org/r/201611021950.FEJ34368.HFFJOOMLtQOVSF@I-love.SAKURA.ne.jp
Signed-off-by: Ingo Molnar <mingo@kernel.org>
batch of scattered i915 fixes.
* tag 'drm-intel-fixes-2016-11-01' of git://anongit.freedesktop.org/drm-intel:
drm/i915: Fix SKL+ 90/270 degree rotated plane coordinate computation
drm/i915: Remove two invalid warns
drm/i915: Rotated view does not need a fence
drm/i915/fbc: fix CFB size calculation for gen8+
drm: i915: Wait for fences on new fb, not old
drm/i915: Clean up DDI DDC/AUX CH sanitation
drm/i915: Respect alternate_aux_channel for all DDI ports
drm/i915/gen9: fix watermarks when using the pipe scaler
drm/i915: Fix mismatched INIT power domain disabling during suspend
drm/i915: fix a read size argument
drm/i915: Use fence_write() from rpm resume
drm/i915/gen9: fix DDB partitioning for multi-screen cases
drm/i915: workaround sparse warning on variable length arrays
drm/i915: keep declarations in i915_drv.h
- some fixes for active plane reconfiguration support
- hide unused label in case of disabled CONFIG_DRM_FBDEV_EMULATION,
which caused a build warning
- fixed error handling in imx_drm_bind
- disallow odd x/y plane offsets for chroma subsampled formats
- disable local alpha when switching from a format with alpha
channel to an opaque format
-----BEGIN PGP SIGNATURE-----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=lgaf
-----END PGP SIGNATURE-----
Merge tag 'imx-drm-fixes-20161021' of git://git.pengutronix.de/pza/linux into drm-fixes
imx-drm plane, build warning, and error handling fixes
- some fixes for active plane reconfiguration support
- hide unused label in case of disabled CONFIG_DRM_FBDEV_EMULATION,
which caused a build warning
- fixed error handling in imx_drm_bind
- disallow odd x/y plane offsets for chroma subsampled formats
- disable local alpha when switching from a format with alpha
channel to an opaque format
* tag 'imx-drm-fixes-20161021' of git://git.pengutronix.de/pza/linux:
drm/imx: ipuv3-plane: disable local alpha for planes without alpha channel
drm/imx: ipuv3-plane: make sure x/y offsets are even in case of chroma subsampling
drm/imx: ipuv3-plane: Access old u/vbo properly in ->atomic_check for YU12/YV12
drm/imx: drm_dev_alloc() returns error pointers
drm/imx: ipuv3-plane: Skip setting u/vbo only when we don't need modeset
drm/imx: ipuv3-plane: Switch EBA buffer only when we don't need modeset
gpu: ipu-v3: Use ERR_CAST instead of ERR_PTR(PTR_ERR())
drm/imx: hide an unused label
virtio-gpu sends vblank events in virtio_gpu_crtc_atomic_flush, and
because of that it must be called for disabled planes too. Ask
drm_atomic_helper_commit_planes to do that.
v2: update to use new drm_atomic_helper_commit_planes() API.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
We have one critical section in the syscall entry path in which we switch from
the userspace stack to kernel stack. In the event of an external interrupt, the
interrupt code distinguishes between those two states by analyzing the value of
sr7. If sr7 is zero, it uses the kernel stack. Therefore it's important, that
the value of sr7 is in sync with the currently enabled stack.
This patch now disables interrupts while executing the critical section. This
prevents the interrupt handler to possibly see an inconsistent state which in
the worst case can lead to crashes.
Interestingly, in the syscall exit path interrupts were already disabled in the
critical section which switches back to the userspace stack.
Cc: <stable@vger.kernel.org>
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
There is no need to trash sr2 and sr3 in the Light-weight syscall (LWS). sr2
already points to kernel space (it's zero in userspace, otherwise syscalls
wouldn't work), and since the LWS code is executed in userspace, we can simply
ignore to preload sr3.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Recent changes to printk require KERN_CONT uses to continue logging messages.
So add KERN_CONT to output of device inventory.
Signed-off-by: Helge Deller <deller@gmx.de>
Commit 41061cdb98 ("KVM: emulate: do not initialize memopp") removes a
check for non-NULL under incorrect assumptions. An undefined instruction
with a ModR/M byte with Mod=0 and R/M-5 (e.g. 0xc7 0x15) will attempt
to dereference a null pointer here.
Fixes: 41061cdb98
Message-Id: <1477592752-126650-2-git-send-email-osh@google.com>
Signed-off-by: Owen Hofmann <osh@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
After a successful VM-entry with the "VMCS shadowing" VM-execution
control set, the shadow VMCS referenced by the VMCS link pointer field
in the current VMCS becomes active on the logical processor.
A VMCS that is made active on more than one logical processor may become
corrupted. Therefore, before an active VMCS can be migrated to another
logical processor, the first logical processor must execute a VMCLEAR
for the active VMCS. VMCLEAR both ensures that all VMCS data are written
to memory and makes the VMCS inactive.
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-By: David Matlack <dmatlack@google.com>
Message-Id: <1477668579-22555-1-git-send-email-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Since commit a545ab6a00 ("kvm: x86: add tsc_offset field to struct
kvm_vcpu_arch", 2016-09-07) the offset between host and L1 TSC is
cached and need not be fished out of the VMCS or VMCB. This means
that we can implement adjust_tsc_offset_guest and read_l1_tsc
entirely in generic code. The simplification is particularly
significant for VMX code, where vmx->nested.vmcs01_tsc_offset
was duplicating what is now in vcpu->arch.tsc_offset. Therefore
the vmcs01_tsc_offset can be dropped completely.
More importantly, this fixes KVM_GET_CLOCK/KVM_SET_CLOCK
which, after commit 108b249c45 ("KVM: x86: introduce get_kvmclock_ns",
2016-09-01) called read_l1_tsc while the VMCS was not loaded.
It thus returned bogus values on Intel CPUs.
Fixes: 108b249c45
Reported-by: Roman Kagan <rkagan@virtuozzo.com>
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Just minor tweaks, there's nothing major in this cycle.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJYFnb+AAoJECgfDbjSjVRpBD4IAKjmFLG6rcswWwYVSNwxMcEX
6gxStyojtx9jTdQhjYUeC4KJmPozGn9mxEyHuWHNAqWWP/nASbViXYDwVm9xv/14
TxuApiOJ9tFB0DYlduGDQbS5D6m3WSk7U2s71pwC0g2YPx1EQc8jHbeT09Jn5qVw
6A099BILekts/lN6s9ST+6CAHBLTkZGB6iyAb+zAh+KN+VRX3ikpOjebgUjzO1+P
hLJc+lgfls+cwuhwO5A+Pg1PMrJ455A/gdEVUfMbbj8BAkihueUHPUzkc702Y5h2
j3AfCLJdCBIR/k3+R9Du0IcK0mXioZtiBPfREGQ+kI0ukauFDhtKgjaOd0bmU4s=
=ASeM
-----END PGP SIGNATURE-----
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio updates from Michael Tsirkin:
"Tests, fixes and cleanups.
Just minor tweaks, there's nothing major in this cycle"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_ring: mark vring_dma_dev inline
virtio/vhost: add Jason to list of maintainers
virtio_blk: Delete an unnecessary initialisation in init_vq()
virtio_blk: Use kmalloc_array() in init_vq()
virtio: remove config.c
virtio: console: Unlock vqs while freeing buffers
ringtest: poll for new buffers once before updating event index
ringtest: commonize implementation of poll_avail/poll_used
ringtest: use link-time optimization
virtio: update balloon size in balloon "probe"
virtio_ring: Make interrupt suppression spec compliant
virtio_pci: Limit DMA mask to 44 bits for legacy virtio devices
The underlying transport releases the page pointed to by rq_buffer
during xprt_rdma_bc_send_request. When the backchannel reply arrives,
rq_rbuffer then points to freed memory.
Fixes: 68778945e4 ('SUNRPC: Separate buffer pointers for RPC ...')
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This fixes the irq allocation in this driver to not print:
irq: Cannot allocate irq_descs @ IRQ34, assuming pre-allocated
irq: Cannot allocate irq_descs @ IRQ66, assuming pre-allocated
Which happens because the driver already called irq_alloc_descs()
and so the change to use irq_domain_add_simple resulted in calling
irq_alloc_descs() twice.
Modernize the irq allocation in this driver to use the
irq_domain_add_linear flow directly and eliminate the use of
irq_domain_add_simple/legacy
Fixes: ce931f571b ("gpio/mvebu: convert to use irq_domain_add_simple()")
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
If something goes wrong with task stack refcounting and a stack
refcount hits zero too early, warn and leak it rather than
potentially freeing it early (and silently).
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/f29119c783a9680a4b4656e751b6123917ace94b.1477926663.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Check whether the kernel really supports power resources for a device,
otherwise the power might not be removed when the device is runtime
suspended (DSM should still work in these cases where PR does not).
This is a workaround for a problem where ACPICA and Windows 10 differ in
behavior. ACPICA does not correctly enumerate power resources within a
conditional block (due to delayed execution of such blocks) and as a
result power_resources is set to false even if _PR3 exists.
Fixes: 692a17dcc2 ("drm/nouveau/acpi: fix lockup with PCIe runtime PM")
Link: https://bugs.freedesktop.org/show_bug.cgi?id=98398
Reported-and-tested-by: Rick Kerkhof <rick.2889@gmail.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: stable@vger.kernel.org # v4.8+
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Sylvain Lemieux reports the LPC32xx GPIO driver is broken since
commit 762c2e46c0 ("gpio: of: remove of_gpiochip_and_xlate() and
struct gg_data"). Probably, gpio-etraxfs.c and gpio-davinci.c are
broken too.
Those drivers register multiple gpio_chip that are associated to a
single OF node, and their own .of_xlate() checks if the passed
gpio_chip is valid.
Now, the problem is of_find_gpiochip_by_node() returns the first
gpio_chip found to match the given node. So, .of_xlate() fails,
except for the first GPIO bank.
Reverting the commit could be a solution, but I do not want to go
back to the mess of struct gg_data. Another solution here is to
take the match by a node pointer and the success of .of_xlate().
It is a bit clumsy to call .of_xlate twice; for gpio_chip matching
and for really getting the gpio_desc index. Perhaps, our long-term
goal might be to convert the drivers to single chip registration,
but this commit will solve the problem until then.
Fixes: 762c2e46c0 ("gpio: of: remove of_gpiochip_and_xlate() and struct gg_data")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reported-by: Sylvain Lemieux <slemieux.tyco@gmail.com>
Tested-by: David Lechner <david@lechnology.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
When allocating a new line handle or event a file is allocated that it is
associated to. The file is attached to a file descriptor of the current
process and the file descriptor is returned to userspace using
copy_to_user(). If this copy operation fails the line handle or event
allocation is aborted, all acquired resources are freed and an error is
returned.
But the file struct is not freed and left attached to the userspace
application and even though the file descriptor number was not copied it is
trivial to guess. If a userspace application performs a IOCTL on such a
left over file descriptor it will trigger a use-after-free and if the file
descriptor is closed (latest when the application exits) a double-free is
triggered.
anon_inode_getfd() performs 3 tasks, allocate a file struct, allocate a
file descriptor for the current process and install the file struct in the
file descriptor. As soon as the file struct is installed in the file
descriptor it is accessible by userspace (even if the IOCTL itself hasn't
completed yet), this means uninstalling the fd on the error path is not an
option, since userspace might already got a reference to the file.
Instead anon_inode_getfd() needs to be broken into its individual steps.
The allocation of the file struct and file descriptor is done first, then
the copy_to_user() is executed and only if it succeeds the file is
installed.
Since the file struct is reference counted it can not be just freed, but
its reference needs to be dropped, which will also call the release()
callback, which will free the state attached to the file. So in this case
the normal error cleanup path should not be taken.
Cc: stable@vger.kernel.org
Fixes: d932cd4918 ("gpio: free handles in fringe cases")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
A few small fixes for SPI, one core fix that only applies in cases where
we're handling DT overlays and a couple of driver specific fixes:
- Fix handling of error cases when instantiating DT overlays so we
don't end up just ignoring devices that encountered an error during
instantiation.
- Avoid reading uninitialized data when handing spurious interrupts
in the espi driver.
- A driver specific fix for the dspi driver to fix a bad interaction
with u-boot.
-----BEGIN PGP SIGNATURE-----
iQEwBAABCAAaBQJYF4M5Exxicm9vbmllQGtlcm5lbC5vcmcACgkQJNaLcl1Uh9BF
yAf+KC6vYTX8ySbfie5vAjCezUoujdHhjy8uO5dKX4OLGz3UhFZ0bpCgBlGx5XGw
KBllfiA+fkKrxBvJCPIvRW33UDXLTRDAiCTw4nT9FoYEsSotApJ62kElRulz850c
3l1n8/+WuAw2khq89r+MYDVLZZ1ssUNkj4hug+EKipibBHNV/z1P0GPRthGzRzmV
VcQ/JBPhKhqF1+N2gGS099N5+vic7pPQUGxVpjdrFColyuRtwmXJfynZYxHM7GjD
UcmgzOwN7EuKZZgkBG2bZAyDZSNFTkNljOxiDeVCkJVyK4Oj1YPkQ6NWjGtIVNAW
AtmptgxAcqqhA+tAPyhpFeHG+Q==
=zMqg
-----END PGP SIGNATURE-----
Merge tag 'spi-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown: "A few small fixes for SPI, one core fix
that only applies in cases where we're handling DT overlays and a
couple of driver specific fixes:
- Fix handling of error cases when instantiating DT overlays so we
don't end up just ignoring devices that encountered an error during
instantiation.
- Avoid reading uninitialized data when handing spurious interrupts
in the espi driver.
- A driver specific fix for the dspi driver to fix a bad interaction
with u-boot"
* tag 'spi-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: dspi: clear SPI_SR before enable interrupt
spi: fsl-espi: avoid processing uninitalized data on error
spi: mark device nodes only in case of successful instantiation
The stack frame size could grow too large when the plugin used long long
on 32-bit architectures when the given function had too many basic blocks.
The gcc warning was:
drivers/pci/hotplug/ibmphp_ebda.c: In function 'ibmphp_access_ebda':
drivers/pci/hotplug/ibmphp_ebda.c:409:1: warning: the frame size of 1108 bytes is larger than 1024 bytes [-Wframe-larger-than=]
This switches latent_entropy from u64 to unsigned long.
Thanks to PaX Team and Emese Revfy for the patch.
Signed-off-by: Kees Cook <keescook@chromium.org>
A new warning was introduced for missing information about the time that
regulators take to power on in v4.9. This is in theory a real issue but
for most practical regulators the communication overhead of talking to
the device is greater than the ramp time so a lot of drivers don't set
it and the warning is far too noisy without identifying practical
issues. Just remove the warning for now.
-----BEGIN PGP SIGNATURE-----
iQEwBAABCAAaBQJYF3a0Exxicm9vbmllQGtlcm5lbC5vcmcACgkQJNaLcl1Uh9DF
Jwf/dnH06enDvPjUvoqX+V6eT++FUI7DeIoMVNGCEYiJtqUmpLWSvbJ2IT68AEks
4IroBUEA57JE7sQ+gd0H6ZiXCq7Pk2QPD+bpnH5aJIdRpLGn9ew4o0p/3DGjS43q
V0A6N83BeWHeDAeyu6NSo9aAdTwD5ENCuy1XqhEVMFSPpUqutyfDgqSzFtCO4Cl9
MnoTv7be37YNFb+JsFlTdOmThfmtLoJJGd8E4/bUqBb36FoYLyGVNvEE0Xwagc8Q
dcUZXYqfw8qMWipCxBM2wdv/lXJQAFpAbuftACnaz+jmpAbOsWRZ2QmcBPQOxDhn
oif0/hccYoIcW0knMbhEx6yERQ==
=7KoE
-----END PGP SIGNATURE-----
Merge tag 'regulator-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fix from Mark Brown:
"Fix ramp_delay warnings for v4.9
A new warning was introduced for missing information about the time
that regulators take to power on in v4.9. This is in theory a real
issue but for most practical regulators the communication overhead of
talking to the device is greater than the ramp time so a lot of
drivers don't set it and the warning is far too noisy without
identifying practical issues.
Just remove the warning for now"
* tag 'regulator-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: core: silence warning: "VDD1: ramp_delay not set"
A couple of small build fixes here, nothing major. The missing include
is triggered in some configurations and the renaming of ret is defensive
for the benefit of some drivers people are in the process of mainlining.
-----BEGIN PGP SIGNATURE-----
iQEwBAABCAAaBQJYF3OfExxicm9vbmllQGtlcm5lbC5vcmcACgkQJNaLcl1Uh9DY
Dgf/VDYO5Br2+73lMZUS2oZFY9PtdapCSr0u02gZsMhphioV7k+WcKrdd22IuNQB
dsk5vJPjcb6ElUmC9Aj2q4AcuVK5RHcjgADj40uqVoWXf7kBiyZlbBn2Om8D24+I
ribzAGZO1V9CtnSkTtrRIqMgzM9LsZvkPWRRyACNBwKaWxriqIwgI7mhEwGDy3gf
xRq2Qqunt0A3s2vrqkfQBVo1HZ2hrruVkcCG6TzOaiuqOpmgkevmDuwFuknQe6+T
zpqHU6SQNeV11C9GJS094iM91lKnFu920BGk/tonM+paEFtAxx5ovZ0GjJMQPaY4
kouLDJePoJ+LKRClP9qRvZwDmw==
=kSKf
-----END PGP SIGNATURE-----
Merge tag 'regmap-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
Pull regmap fixes from Mark Brown:
"A couple of small build fixes here, nothing major.
The missing include is triggered in some configurations and the
renaming of ret is defensive for the benefit of some drivers people
are in the process of mainlining"
* tag 'regmap-fix-v4.9-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
regmap: Rename ret variable in regmap_read_poll_timeout
regmap: include <linux/delay.h> from include/linux/regmap.h
Pull TPM fix from James Morris.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security:
tpm: remove invalid min length check from tpm_do_selftest()
Removal of this check was not properly amended to the original commit.
Cc: stable@vger.kernel.org
Fixes: 0c54133223 ("tpm: use tpm_pcr_read_dev() in tpm_do_selftest()")
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
Pull ARM fixes from Russell King:
"A fix for a regression on ARMv4T CPUs, and wiring up the new pkey
syscalls for ARM"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: wire up new pkey syscalls
ARM: fix oops when using older ARMv4T CPUs
Pull sparc fixes from David Miller:
"Several sparc64 bug fixes here:
1) Make the user copy routines on sparc64 return a properly accurate
residual length when an exception occurs.
2) We can get enormous kernel TLB range flush requests from vmalloc
unmaps, so handle these more gracefully by doing full flushes
instead of going page-by-page.
3) Cope properly with negative branch offsets in sparc jump-label
support, from James Clarke.
4) Some old-style decl GCC warning fixups from Tobias Klauser"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc64: Handle extremely large kernel TLB range flushes more gracefully.
sparc64: Fix illegal relative branches in hypervisor patched TLB cross-call code.
sparc64: Fix instruction count in comment for __hypervisor_flush_tlb_pending.
sparc64: Handle extremely large kernel TSB range flushes sanely.
sparc: Handle negative offsets in arch_jump_label_transform
sparc64: Fix illegal relative branches in hypervisor patched TLB code.
sparc64: Delete now unused user copy fixup functions.
sparc64: Delete now unused user copy assembler helpers.
sparc64: Convert U3copy_{from,to}_user to accurate exception reporting.
sparc64: Convert NG2copy_{from,to}_user to accurate exception reporting.
sparc64: Convert NGcopy_{from,to}_user to accurate exception reporting.
sparc64: Convert NG4copy_{from,to}_user to accurate exception reporting.
sparc64: Convert U1copy_{from,to}_user to accurate exception reporting.
sparc64: Convert GENcopy_{from,to}_user to accurate exception reporting.
sparc64: Convert copy_in_user to accurate exception reporting.
sparc64: Prepare to move to more saner user copy exception handling.
sparc64: Delete __ret_efault.
sparc32: Fix old style declaration GCC warnings
sparc64: Fix old style declaration GCC warnings
sparc64: Setup a scheduling domain for highest level cache.
Make sure the copied up file hits the disk before renaming to the final
destination. If this is not done then the copy-up may corrupt the data in
the file in case of a crash.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: <stable@vger.kernel.org>
tmpfs doesn't have ->get_acl() because it only uses cached acls.
This fixes the acl tests in pjdfstest when tmpfs is used as the upper layer
of the overlay.
Reported-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 39a25b2b37 ("ovl: define ->get_acl() for overlay inodes")
Cc: <stable@vger.kernel.org> # v4.8
This change fixes xfstest generic/375, which failed to clear the
setgid bit in the following test case on overlayfs:
touch $testfile
chown 100:100 $testfile
chmod 2755 $testfile
_runas -u 100 -g 101 -- setfacl -m u::rwx,g::rwx,o::rwx $testfile
Reported-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Tested-by: Amir Goldstein <amir73il@gmail.com>
Fixes: d837a49bd5 ("ovl: fix POSIX ACL setting")
Cc: <stable@vger.kernel.org> # v4.8
This inline function is unused on configurations
where dma_map/unmap are empty macros.
Make the function inline to avoid gcc errors because
of an unused static function.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Jason's been one of the mst active contributors
to virtio and vhost, it will help to formalize this
and list him as co-maintainer.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The local variable "err" will be set to an appropriate value
by a following statement.
Thus omit the explicit initialisation at the beginning.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Multiplications for the size determination of memory allocations
indicated that array data structures should be processed.
Thus use the corresponding function "kmalloc_array".
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Commit c6017e793b ("virtio: console: add locks around buffer removal
in port unplug path") added locking around the freeing of buffers in the
vq. However, when free_buf() is called with can_sleep = true and rproc
is enabled, it calls dma_free_coherent() directly, requiring interrupts
to be enabled. Currently a WARNING is triggered due to the spin locking
around free_buf, with a call stack like this:
WARNING: CPU: 3 PID: 121 at ./include/linux/dma-mapping.h:433
free_buf+0x1a8/0x288
Call Trace:
[<8040c538>] show_stack+0x74/0xc0
[<80757240>] dump_stack+0xd0/0x110
[<80430d98>] __warn+0xfc/0x130
[<80430ee0>] warn_slowpath_null+0x2c/0x3c
[<807e7c6c>] free_buf+0x1a8/0x288
[<807ea590>] remove_port_data+0x50/0xac
[<807ea6a0>] unplug_port+0xb4/0x1bc
[<807ea858>] virtcons_remove+0xb0/0xfc
[<807b6734>] virtio_dev_remove+0x58/0xc0
[<807f918c>] __device_release_driver+0xac/0x134
[<807f924c>] device_release_driver+0x38/0x50
[<807f7edc>] bus_remove_device+0xfc/0x130
[<807f4b74>] device_del+0x17c/0x21c
[<807f4c38>] device_unregister+0x24/0x38
[<807b6b50>] unregister_virtio_device+0x28/0x44
Fix this by restructuring the loops to allow the locks to only be taken
where it is necessary to protect the vqs, and release it while the
buffer is being freed.
Fixes: c6017e793b ("virtio: console: add locks around buffer removal in port unplug path")
Cc: stable@vger.kernel.org
Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Updating the event index has a memory barrier and causes more work
on the other side to actually signal the event. It is unnecessary
if a new buffer has already appeared on the ring, so poll once before
doing the update.
The effect of this on the 0.9 ring implementation is pretty much
invisible, but on the new-style ring it provides a consistent 3%
performance improvement.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Provide new primitives used_empty/avail_empty and
build poll_avail/poll_used on top of it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
By using -flto and -fwhole-program, all functions from the ring implementation
can be treated as static and possibly inlined. Force this to happen through
the GCC flatten attribute.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The following commit 'fad7b7b27b6a (virtio_balloon: Use a workqueue
instead of "vballoon" kthread)' has added a regression. Original code with
kthread starts the thread inside probe and checks the necessity to update
balloon inside the thread immediately.
Nowadays the code behaves differently. Work is queued only on the first
command from the host after the negotiation. Thus there is a window
especially at the guest startup or the module reloading when the balloon
size is not updated until the notification from the host.
This patch adds balloon size check at the end of the probe to match
original behaviour.
Signed-off-by: Konstantin Neumoin <kneumoin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
According to the spec, if the VIRTIO_RING_F_EVENT_IDX feature bit is
negotiated the driver MUST set flags to 0. Not dirtying the available
ring in virtqueue_disable_cb also has a minor positive performance
impact, improving L1 dcache load missed by ~0.5% in vring_bench.
Writes to the used event field (vring_used_event) are still unconditional.
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: <stable@vger.kernel.org> # f277ec4 virtio_ring: shadow available
Cc: <stable@vger.kernel.org>
Signed-off-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Legacy virtio defines the virtqueue base using a 32-bit PFN field, with
a read-only register indicating a fixed page size of 4k.
This can cause problems for DMA allocators that allocate top down from
the DMA mask, which is set to 64 bits. In this case, the addresses are
silently truncated to 44-bit, leading to IOMMU faults, failure to read
from the queue or data corruption.
This patch restricts the coherent DMA mask for legacy PCI virtio devices
to 44 bits, which matches the specification.
Cc: stable@vger.kernel.org
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Benjamin Serebrin <serebrin@google.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Pull networking fixes from David Miller:
"Lots of fixes, mostly drivers as is usually the case.
1) Don't treat zero DMA address as invalid in vmxnet3, from Alexey
Khoroshilov.
2) Fix element timeouts in netfilter's nft_dynset, from Anders K.
Pedersen.
3) Don't put aead_req crypto struct on the stack in mac80211, from
Ard Biesheuvel.
4) Several uninitialized variable warning fixes from Arnd Bergmann.
5) Fix memory leak in cxgb4, from Colin Ian King.
6) Fix bpf handling of VLAN header push/pop, from Daniel Borkmann.
7) Several VRF semantic fixes from David Ahern.
8) Set skb->protocol properly in ip6_tnl_xmit(), from Eli Cooper.
9) Socket needs to be locked in udp_disconnect(), from Eric Dumazet.
10) Div-by-zero on 32-bit fix in mlx4 driver, from Eugenia Emantayev.
11) Fix stale link state during failover in NCSCI driver, from Gavin
Shan.
12) Fix netdev lower adjacency list traversal, from Ido Schimmel.
13) Propvide proper handle when emitting notifications of filter
deletes, from Jamal Hadi Salim.
14) Memory leaks and big-endian issues in rtl8xxxu, from Jes Sorensen.
15) Fix DESYNC_FACTOR handling in ipv6, from Jiri Bohac.
16) Several routing offload fixes in mlxsw driver, from Jiri Pirko.
17) Fix broadcast sync problem in TIPC, from Jon Paul Maloy.
18) Validate chunk len before using it in SCTP, from Marcelo Ricardo
Leitner.
19) Revert a netns locking change that causes regressions, from Paul
Moore.
20) Add recursion limit to GRO handling, from Sabrina Dubroca.
21) GFP_KERNEL in irq context fix in ibmvnic, from Thomas Falcon.
22) Avoid accessing stale vxlan/geneve socket in data path, from
Pravin Shelar"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (189 commits)
geneve: avoid using stale geneve socket.
vxlan: avoid using stale vxlan socket.
qede: Fix out-of-bound fastpath memory access
net: phy: dp83848: add dp83822 PHY support
enic: fix rq disable
tipc: fix broadcast link synchronization problem
ibmvnic: Fix missing brackets in init_sub_crq_irqs
ibmvnic: Fix releasing of sub-CRQ IRQs in interrupt context
Revert "ibmvnic: Fix releasing of sub-CRQ IRQs in interrupt context"
arch/powerpc: Update parameters for csum_tcpudp_magic & csum_tcpudp_nofold
net/mlx4_en: Save slave ethtool stats command
net/mlx4_en: Fix potential deadlock in port statistics flow
net/mlx4: Fix firmware command timeout during interrupt test
net/mlx4_core: Do not access comm channel if it has not yet been initialized
net/mlx4_en: Fix panic during reboot
net/mlx4_en: Process all completions in RX rings after port goes up
net/mlx4_en: Resolve dividing by zero in 32-bit system
net/mlx4_core: Change the default value of enable_qos
net/mlx4_core: Avoid setting ports to auto when only one port type is supported
net/mlx4_core: Fix the resource-type enum in res tracker to conform to FW spec
...
This patch is similar to earlier vxlan patch.
Geneve device close operation frees geneve socket. This
operation can race with geneve-xmit function which
dereferences geneve socket. Following patch uses RCU
mechanism to avoid this situation.
Signed-off-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When vxlan device is closed vxlan socket is freed. This
operation can race with vxlan-xmit function which
dereferences vxlan socket. Following patch uses RCU
mechanism to avoid this situation.
Signed-off-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Tetsuo Handa