AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-28 11:18:45 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
972,372 Commits 1 Branch 0 Tags 2 GiB
C 97.7%
Assembly 1.2%
Shell 0.3%
Makefile 0.3%
Python 0.2%
Other 0.1%
1e2a75c24a
Go to file
Manaf Meethalavalappu Pallikunhi 1e2a75c24a thermal/core: Add NULL pointer check before using cooling device stats 
[ Upstream commit 2046a24ae121cd107929655a6aaf3b8c5beea01f ]

There is a possible chance that some cooling device stats buffer
allocation fails due to very high cooling device max state value.
Later cooling device update sysfs can try to access stats data
for the same cooling device. It will lead to NULL pointer
dereference issue.

Add a NULL pointer check before accessing thermal cooling device
stats data. It fixes the following bug

[ 26.812833] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000004
[ 27.122960] Call trace:
[ 27.122963] do_raw_spin_lock+0x18/0xe8
[ 27.122966] _raw_spin_lock+0x24/0x30
[ 27.128157] thermal_cooling_device_stats_update+0x24/0x98
[ 27.128162] cur_state_store+0x88/0xb8
[ 27.128166] dev_attr_store+0x40/0x58
[ 27.128169] sysfs_kf_write+0x50/0x68
[ 27.133358] kernfs_fop_write+0x12c/0x1c8
[ 27.133362] __vfs_write+0x54/0x160
[ 27.152297] vfs_write+0xcc/0x188
[ 27.157132] ksys_write+0x78/0x108
[ 27.162050] ksys_write+0xf8/0x108
[ 27.166968] __arm_smccc_hvc+0x158/0x4b0
[ 27.166973] __arm_smccc_hvc+0x9c/0x4b0
[ 27.186005] el0_svc+0x8/0xc

Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1607367181-24589-1-git-send-email-manafm@codeaurora.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-04-07 15:00:06 +02:00
arch bpf: Fix fexit trampoline. 2021-04-07 15:00:03 +02:00
block block: recalculate segment count for multi-segment discards correctly 2021-03-30 14:32:06 +02:00
certs
crypto
Documentation KVM: x86: Protect userspace MSR filter with SRCU, and set atomically-ish 2021-03-30 14:31:53 +02:00
drivers thermal/core: Add NULL pointer check before using cooling device stats 2021-04-07 15:00:06 +02:00
fs io_uring: fix ->flags races by linked timeouts 2021-04-07 15:00:05 +02:00
include bpf: Fix fexit trampoline. 2021-04-07 15:00:03 +02:00
init
ipc
kernel kernel: freezer should treat PF_IO_WORKER like PF_KTHREAD for freezing 2021-04-07 15:00:05 +02:00
lib
LICENSES
mm mm/memcg: fix 5.10 backport of splitting page memcg 2021-03-30 14:32:07 +02:00
net rpc: fix NULL dereference on kmalloc failure 2021-04-07 15:00:04 +02:00
samples
scripts kbuild: dummy-tools: fix inverted tests for gcc 2021-03-30 14:31:50 +02:00
security integrity: double check iint_cache was initialized 2021-03-30 14:31:55 +02:00
sound ASoC: rt711: add snd_soc_component remove callback 2021-04-07 15:00:06 +02:00
tools perf synthetic events: Avoid write of uninitialized memory when generating PERF_RECORD_MMAP* records 2021-03-30 14:32:06 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: move the staging subsystem to lists.linux.dev 2021-03-25 09:04:18 +01:00
Makefile Linux 5.10.27 2021-03-30 14:32:09 +02:00
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.