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KASAN instrumentation of lockdep has been disabled, as we don't need KASAN to check the validity of lockdep internal data structures and incur unnecessary performance overhead. However, the lockdep_map pointer passed in externally may not be valid (e.g. use-after-free) and we run the risk of using garbage data resulting in false lockdep reports. Add kasan_check_byte() call in lock_acquire() for non kernel core data object to catch invalid lockdep_map and print out a KASAN report before any lockdep splat, if any. Suggested-by: Marco Elver <elver@google.com> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Boqun Feng <boqun.feng@gmail.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Marco Elver <elver@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com> Link: https://lore.kernel.org/r/20250214195242.2480920-1-longman@redhat.com Link: https://lore.kernel.org/r/20250307232717.1759087-7-boqun.feng@gmail.com |
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| .. | ||
| irqflag-debug.c | ||
| lock_events.c | ||
| lock_events.h | ||
| lock_events_list.h | ||
| lockdep.c | ||
| lockdep_internals.h | ||
| lockdep_proc.c | ||
| lockdep_states.h | ||
| locktorture.c | ||
| Makefile | ||
| mcs_spinlock.h | ||
| mutex-debug.c | ||
| mutex.c | ||
| mutex.h | ||
| osq_lock.c | ||
| percpu-rwsem.c | ||
| qrwlock.c | ||
| qspinlock.c | ||
| qspinlock_paravirt.h | ||
| qspinlock_stat.h | ||
| rtmutex.c | ||
| rtmutex_api.c | ||
| rtmutex_common.h | ||
| rwbase_rt.c | ||
| rwsem.c | ||
| semaphore.c | ||
| spinlock.c | ||
| spinlock_debug.c | ||
| spinlock_rt.c | ||
| test-ww_mutex.c | ||
| ww_mutex.h | ||
| ww_rt_mutex.c | ||