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Filename Latest commit message Latest commit date
Matthew Brost c5c2b4ca50 drm/i915: Fix syncmap memory leak 
[ Upstream commit a63bcf08f0efb5348105bb8e0e1e8c6671077753 ]

A small race exists between intel_gt_retire_requests_timeout and
intel_timeline_exit which could result in the syncmap not getting
free'd. Rather than work to hard to seal this race, simply cleanup the
syncmap on fini.

unreferenced object 0xffff88813bc53b18 (size 96):
  comm "gem_close_race", pid 5410, jiffies 4294917818 (age 1105.600s)
  hex dump (first 32 bytes):
    01 00 00 00 00 00 00 00 00 00 00 00 0a 00 00 00  ................
    00 00 00 00 00 00 00 00 6b 6b 6b 6b 06 00 00 00  ........kkkk....
  backtrace:
    [<00000000120b863a>] __sync_alloc_leaf+0x1e/0x40 [i915]
    [<00000000042f6959>] __sync_set+0x1bb/0x240 [i915]
    [<0000000090f0e90f>] i915_request_await_dma_fence+0x1c7/0x400 [i915]
    [<0000000056a48219>] i915_request_await_object+0x222/0x360 [i915]
    [<00000000aaac4ee3>] i915_gem_do_execbuffer+0x1bd0/0x2250 [i915]
    [<000000003c9d830f>] i915_gem_execbuffer2_ioctl+0x405/0xce0 [i915]
    [<00000000fd7a8e68>] drm_ioctl_kernel+0xb0/0xf0 [drm]
    [<00000000e721ee87>] drm_ioctl+0x305/0x3c0 [drm]
    [<000000008b0d8986>] __x64_sys_ioctl+0x71/0xb0
    [<0000000076c362a4>] do_syscall_64+0x33/0x80
    [<00000000eb7a4831>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Fixes: 531958f6f3 ("drm/i915/gt: Track timeline activeness in enter/exit")
Cc: <stable@vger.kernel.org>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730195342.110234-1-matthew.brost@intel.com
(cherry picked from commit faf890985e30d5e88cc3a7c50c1bcad32f89ab7c)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-09-03 10:08:14 +02:00
arch ARC: Fix CONFIG_STACKDEPOT 2021-09-03 10:08:12 +02:00
block blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit() 2021-08-12 13:20:58 +02:00
certs certs: Move load_system_certificate_list to a common function 2021-06-30 08:47:55 -04:00
crypto crypto: shash - avoid comparing pointers to exported functions under CFI 2021-07-14 16:53:13 +02:00
Documentation KVM: X86: MMU: Use the correct inherited permissions to get shadow page 2021-08-15 13:08:04 +02:00
drivers drm/i915: Fix syncmap memory leak 2021-09-03 10:08:14 +02:00
fs mm, oom: make the calculation of oom badness more accurate 2021-09-03 10:08:12 +02:00
include mm, oom: make the calculation of oom badness more accurate 2021-09-03 10:08:12 +02:00
init kbuild: add CONFIG_LD_IS_LLD 2021-06-30 08:47:44 -04:00
ipc
kernel tracing / histogram: Fix NULL pointer dereference on strcmp() on NULL event name 2021-08-26 08:36:20 -04:00
lib once: Fix panic when module unload 2021-09-03 10:08:12 +02:00
LICENSES
mm mm, oom: make the calculation of oom badness more accurate 2021-09-03 10:08:12 +02:00
net rtnetlink: Return correct error on changing device netns 2021-09-03 10:08:14 +02:00
samples samples/bpf: Fix the error return code of xdp_redirect's main() 2021-07-14 16:53:30 +02:00
scripts scripts/tracing: fix the bug that can't parse raw_trace_func 2021-08-12 13:21:00 +02:00
security smackfs: restrict bytes count in smk_set_cipso() 2021-07-19 08:53:18 +02:00
sound ASoC: intel: atom: Fix breakage for PCM buffer address setup 2021-08-26 08:36:21 -04:00
tools bpf, selftests: Adjust few selftest result_unpriv outcomes 2021-08-12 13:21:04 +02:00
usr
virt KVM: Do not leak memory for duplicate debugfs directories 2021-08-12 13:21:03 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.143 2021-08-26 08:55:22 -04:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.