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Peter Zijlstra 0dc636b3b7 x86: Pin task-stack in __get_wchan() 
When commit 5d1ceb3969 ("x86: Fix __get_wchan() for !STACKTRACE")
moved from stacktrace to native unwind_*() usage, the
try_get_task_stack() got lost, leading to use-after-free issues for
dying tasks.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Fixes: 5d1ceb3969 ("x86: Fix __get_wchan() for !STACKTRACE")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=215031
Link: https://lore.kernel.org/stable/YZV02RCRVHIa144u@fedora64.linuxtx.org/
Reported-by: Justin Forbes <jmforbes@linuxtx.org>
Reported-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Cc: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-11-19 10:14:57 -08:00
..
alpha Merge branch 'akpm' (patches from Andrew) 2021-11-09 10:11:53 -08:00
arc Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2021-11-10 16:15:54 -08:00
arm ARM fixes for 5.16-rc1: 2021-11-14 11:30:50 -08:00
arm64 Selftest changes: 2021-11-18 12:05:22 -08:00
csky asm-generic: asm/syscall.h cleanup 2021-11-10 11:22:03 -08:00
h8300 Kbuild updates for v5.16 2021-11-08 09:15:45 -08:00
hexagon sched: Add wrapper for get_wchan() to keep task blocked 2021-10-15 11:25:14 +02:00
ia64 asm-generic: asm/syscall.h cleanup 2021-11-10 11:22:03 -08:00
m68k Fixes include: 2021-11-11 14:22:05 -08:00
microblaze asm-generic: asm/syscall.h cleanup 2021-11-10 11:22:03 -08:00
mips Selftest changes: 2021-11-18 12:05:22 -08:00
nds32 Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2021-11-10 16:15:54 -08:00
nios2 asm-generic: asm/syscall.h cleanup 2021-11-10 11:22:03 -08:00
openrisc Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2021-11-10 16:15:54 -08:00
parisc parisc: Enable CONFIG_PRINTK_TIME=y in 32bit defconfig 2021-11-18 09:02:32 +01:00
powerpc Selftest changes: 2021-11-18 12:05:22 -08:00
riscv Selftest changes: 2021-11-18 12:05:22 -08:00
s390 Selftest changes: 2021-11-18 12:05:22 -08:00
sh arch/sh updates for 5.16 2021-11-14 11:37:49 -08:00
sparc Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2021-11-10 16:15:54 -08:00
um Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2021-11-10 16:15:54 -08:00
x86 x86: Pin task-stack in __get_wchan() 2021-11-19 10:14:57 -08:00
xtensa Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2021-11-10 16:15:54 -08:00
.gitignore
Kconfig Tracing updates for 5.16: 2021-11-01 20:05:19 -07:00