tree aed1e0d52ada95dd706597679d80d770fe6deb7f
parent 0952d87fd6a6211ac51b2abdc5c066b49c651fd8
author Andrey Konovalov <andreyknvl@google.com> 1446778261 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1446780888 -0800

kasan: accurately determine the type of the bad access

Makes KASAN accurately determine the type of the bad access. If the shadow
byte value is in the [0, KASAN_SHADOW_SCALE_SIZE) range we can look at
the next shadow byte to determine the type of the access.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Konstantin Serebryany <kcc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>