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Commit 5c335fe0 authored by Dmitry Vyukov's avatar Dmitry Vyukov Committed by Linus Torvalds
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mm: prevent KASAN false positives in kmemleak 

When kmemleak dumps contents of leaked objects it reads whole objects
regardless of user-requested size.  This upsets KASAN.  Disable KASAN
checks around object dump.

Link: http://lkml.kernel.org/r/1466617631-68387-1-git-send-email-dvyukov@google.com


Signed-off-by: default avatarDmitry Vyukov <dvyukov@google.com>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent c8cc708a

mm/kmemleak.c

+2 −0
Original line number Diff line number Diff line
@@ -307,8 +307,10 @@ static void hex_dump_object(struct seq_file *seq, 
	len = min_t(size_t, object->size, HEX_MAX_LINES * HEX_ROW_SIZE);



	seq_printf(seq, "  hex dump (first %zu bytes):\n", len);

	kasan_disable_current();

	seq_hex_dump(seq, "    ", DUMP_PREFIX_NONE, HEX_ROW_SIZE,

		     HEX_GROUP_SIZE, ptr, len, HEX_ASCII);

	kasan_enable_current();

}



/*