diff options
| author | Andrey Konovalov <[email protected]> | 2022-03-24 18:12:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2022-03-24 19:06:49 -0700 |
| commit | 476b1dc2bc34febc620b8a6cd459f0b3d9950c34 (patch) | |
| tree | 1ab76788c2966ac14d1683b564207f75e76dc055 | |
| parent | 1e0f611fab9c5743719a95e09a2846e4052fd644 (diff) | |
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 <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Marco Elver <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -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); |