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Commit 1ad3d65c authored by Lecopzer Chen's avatar Lecopzer Chen Committed by Greg Kroah-Hartman
Browse files

kasan: fix incorrect arguments passing in kasan_add_zero_shadow 

commit 5dabd1712cd056814f9ab15f1d68157ceb04e741 upstream.

kasan_remove_zero_shadow() shall use original virtual address, start and
size, instead of shadow address.

Link: https://lkml.kernel.org/r/20210103063847.5963-1-lecopzer@gmail.com


Fixes: 0207df4f ("kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN")
Signed-off-by: default avatarLecopzer Chen <lecopzer.chen@mediatek.com>
Reviewed-by: default avatarAndrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dmitry Vyukov <dvyukov@google.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>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5cb86245

mm/kasan/kasan_init.c

+1 −2
Original line number Diff line number Diff line
@@ -487,7 +487,6 @@ int kasan_add_zero_shadow(void *start, unsigned long size) 


	ret = kasan_populate_zero_shadow(shadow_start, shadow_end);

	if (ret)

		kasan_remove_zero_shadow(shadow_start,

					size >> KASAN_SHADOW_SCALE_SHIFT);

		kasan_remove_zero_shadow(start, size);

	return ret;

}