diff options
| author | Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> | 2022-06-15 09:22:18 +0300 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-07-18 03:14:33 +0300 |
| commit | 3de0de758029a0beb1d47facd3d390d2804a3e94 (patch) | |
| tree | 088f7bc44ea4a7dfe21060ee870332f58d5565f9 /mm/kasan/kasan.h | |
| parent | cb55b83862647da3fbe4135de1723fa78e2357a3 (diff) | |
| download | linux-3de0de758029a0beb1d47facd3d390d2804a3e94.tar.xz | |
kasan: separate double free case from invalid free
Currently, KASAN describes all invalid-free/double-free bugs as
"double-free or invalid-free". This is ambiguous.
KASAN should report "double-free" when a double-free is a more likely
cause (the address points to the start of an object) and report
"invalid-free" otherwise [1].
[1] https://bugzilla.kernel.org/show_bug.cgi?id=212193
Link: https://lkml.kernel.org/r/20220615062219.22618-1-Kuan-Ying.Lee@mediatek.com
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: Yee Lee <yee.lee@mediatek.com>
Cc: Andrew Yang <andrew.yang@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/kasan/kasan.h')
| -rw-r--r-- | mm/kasan/kasan.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index 610d60d6e5b8..01c03e45acd4 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -125,6 +125,7 @@ static inline bool kasan_sync_fault_possible(void) enum kasan_report_type { KASAN_REPORT_ACCESS, KASAN_REPORT_INVALID_FREE, + KASAN_REPORT_DOUBLE_FREE, }; struct kasan_report_info { @@ -277,7 +278,7 @@ static inline void kasan_print_address_stack_frame(const void *addr) { } bool kasan_report(unsigned long addr, size_t size, bool is_write, unsigned long ip); -void kasan_report_invalid_free(void *object, unsigned long ip); +void kasan_report_invalid_free(void *object, unsigned long ip, enum kasan_report_type type); struct page *kasan_addr_to_page(const void *addr); struct slab *kasan_addr_to_slab(const void *addr); |