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authorAndrey Konovalov <andreyknvl@google.com>2020-12-22 23:03:17 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-22 23:55:09 +0300
commitd99f6a10c161227ae7a698470b1cff7b33734d4a (patch)
treea4e42069430240334d27167b8b7e6f00a2ec1736 /mm/kasan/shadow.c
parenteeb3160c2419e0f1045537acac7b19cba64112f4 (diff)
downloadlinux-d99f6a10c161227ae7a698470b1cff7b33734d4a.tar.xz
kasan: don't round_up too much
For hardware tag-based mode kasan_poison_memory() already rounds up the size. Do the same for software modes and remove round_up() from the common code. Link: https://lkml.kernel.org/r/47b232474f1f89dc072aeda0fa58daa6efade377.1606162397.git.andreyknvl@google.com Link: https://linux-review.googlesource.com/id/Ib397128fac6eba874008662b4964d65352db4aa4 Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: Marco Elver <elver@google.com> Tested-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Branislav Rankov <Branislav.Rankov@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Evgenii Stepanov <eugenis@google.com> Cc: Kevin Brodsky <kevin.brodsky@arm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan/shadow.c')
-rw-r--r--mm/kasan/shadow.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c
index 44a2b748f9d3..7c2c08c55f32 100644
--- a/mm/kasan/shadow.c
+++ b/mm/kasan/shadow.c
@@ -82,6 +82,7 @@ void poison_range(const void *address, size_t size, u8 value)
* addresses to this function.
*/
address = kasan_reset_tag(address);
+ size = round_up(size, KASAN_GRANULE_SIZE);
shadow_start = kasan_mem_to_shadow(address);
shadow_end = kasan_mem_to_shadow(address + size);