Zqiang 78d4dccf16 kasan: prevent cpu_quarantine corruption when CPU offline and cache shrink occur at same time ... commit 31fa985b41 upstream. kasan_quarantine_remove_cache() is called in kmem_cache_shrink()/ destroy(). The kasan_quarantine_remove_cache() call is protected by cpuslock in kmem_cache_destroy() to ensure serialization with kasan_cpu_offline(). However the kasan_quarantine_remove_cache() call is not protected by cpuslock in kmem_cache_shrink(). When a CPU is going offline and cache shrink occurs at same time, the cpu_quarantine may be corrupted by interrupt (per_cpu_remove_cache operation). So add a cpu_quarantine offline flags check in per_cpu_remove_cache(). [akpm@linux-foundation.org: add comment, per Zqiang] Link: https://lkml.kernel.org/r/20220414025925.2423818-1-qiang1.zhang@intel.com Signed-off-by: Zqiang <qiang1.zhang@intel.com> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-05-09 09:05:07 +02:00
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common.c	kasan: remove kasan_unpoison_stack_above_sp_to()	2020-08-07 11:33:28 -07:00
generic.c	kasan: record and print the free track	2020-08-07 11:33:28 -07:00
generic_report.c	kasan: record and print the free track	2020-08-07 11:33:28 -07:00
init.c	kasan: fix incorrect arguments passing in kasan_add_zero_shadow	2021-01-27 11:55:23 +01:00
kasan.h	kasan: record and print the free track	2020-08-07 11:33:28 -07:00
Makefile	kbuild: remove cc-option test of -fno-stack-protector	2020-07-07 11:13:10 +09:00
quarantine.c	kasan: prevent cpu_quarantine corruption when CPU offline and cache shrink occur at same time	2022-05-09 09:05:07 +02:00
report.c	mm: kasan: do not panic if both panic_on_warn and kasan_multishot set	2020-10-13 18:38:32 -07:00
tags.c	kasan: record and print the free track	2020-08-07 11:33:28 -07:00
tags_report.c	kasan: detect negative size in memory operation function	2020-04-02 09:35:30 -07:00