From: Lecopzer Chen lecopzer@gmail.com
stable inclusion from linux-4.19.171 commit 1ad3d65c19b9ea823331afd58541a0936b9f2c6c
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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: 0207df4fa1a86 ("kernel/memremap, kasan: make ZONE_DEVICE with work with KASAN") Signed-off-by: Lecopzer Chen lecopzer.chen@mediatek.com Reviewed-by: Andrey 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: Andrew Morton akpm@linux-foundation.org Signed-off-by: Linus Torvalds torvalds@linux-foundation.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com Signed-off-by: Cheng Jian cj.chengjian@huawei.com --- mm/kasan/kasan_init.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/mm/kasan/kasan_init.c b/mm/kasan/kasan_init.c index ee4d5462b558..7a731c74be7d 100644 --- a/mm/kasan/kasan_init.c +++ b/mm/kasan/kasan_init.c @@ -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; }