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kasan: Allow kasan_check_read/write() to accept pointers to volatiles

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Currently kasan_check_read/write() accept 'const void*', make them
accept 'const volatile void*'. This is required for instrumentation
of atomic operations and there is just no reason to not allow that.

Signed-off-by: Dmitry Vyukov <[email protected]>
Reviewed-by: Andrey Ryabinin <[email protected]>
Acked-by: Mark Rutland <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/33e5ec275c1ee89299245b2ebbccd63709c6021f.1498140838.git.dvyukov@google.com
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Dmitry Vyukov 2017-06-22 16:14:17 +02:00 • committed by Ingo Molnar
commit f06e8c584f
2 changed files with 8 additions and 6 deletions
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4
mm/kasan/kasan.c
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@ -267,13 +267,13 @@ static void check_memory_region(unsigned long addr,
check_memory_region_inline(addr, size, write, ret_ip);
}
void kasan_check_read(const void *p, unsigned int size)
void kasan_check_read(const volatile void *p, unsigned int size)
{
check_memory_region((unsigned long)p, size, false, _RET_IP_);
}
EXPORT_SYMBOL(kasan_check_read);
void kasan_check_write(const void *p, unsigned int size)
void kasan_check_write(const volatile void *p, unsigned int size)
{
check_memory_region((unsigned long)p, size, true, _RET_IP_);
}