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| author | Andrey Konovalov <andreyknvl@google.com> | 2022-03-24 18:12:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-03-24 19:06:49 -0700 |
| commit | 476b1dc2bc34febc620b8a6cd459f0b3d9950c34 (patch) | |
| tree | 1ab76788c2966ac14d1683b564207f75e76dc055 /mm | |
| parent | 1e0f611fab9c5743719a95e09a2846e4052fd644 (diff) | |
| download | linux-476b1dc2bc34febc620b8a6cd459f0b3d9950c34.tar.gz | |
kasan: simplify async check in end_report()
Currently, end_report() does not call trace_error_report_end() for bugs detected in either async or asymm mode (when kasan_async_fault_possible() returns true), as the address of the bad access might be unknown. However, for asymm mode, the address is known for faults triggered by read operations. Instead of using kasan_async_fault_possible(), simply check that the addr is not NULL when calling trace_error_report_end(). Link: https://lkml.kernel.org/r/1c8ce43f97300300e62c941181afa2eb738965c5.1646237226.git.andreyknvl@google.com Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Marco Elver <elver@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/kasan/report.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/kasan/report.c b/mm/kasan/report.c index d60ee8b81e2b..2d892ec050be 100644 --- a/mm/kasan/report.c +++ b/mm/kasan/report.c @@ -112,7 +112,7 @@ static void start_report(unsigned long *flags) static void end_report(unsigned long *flags, unsigned long addr) { - if (!kasan_async_fault_possible()) + if (addr) trace_error_report_end(ERROR_DETECTOR_KASAN, addr); pr_err("==================================================================\n"); add_taint(TAINT_BAD_PAGE, LOCKDEP_NOW_UNRELIABLE); |