Waiman Long 39e7234f00 locking/rwsem: Fix kernel crash when spinning on RWSEM_OWNER_UNKNOWN ... The commit 91d2a812df ("locking/rwsem: Make handoff writer optimistically spin on owner") will allow a recently woken up waiting writer to spin on the owner. Unfortunately, if the owner happens to be RWSEM_OWNER_UNKNOWN, the code will incorrectly spin on it leading to a kernel crash. This is fixed by passing the proper non-spinnable bits to rwsem_spin_on_owner() so that RWSEM_OWNER_UNKNOWN will be treated as a non-spinnable target. Fixes: 91d2a812df ("locking/rwsem: Make handoff writer optimistically spin on owner") Reported-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Christoph Hellwig <hch@lst.de> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20200115154336.8679-1-longman@redhat.com		2020-01-17 10:19:27 +01:00
..
Makefile	…
lock_events.c	…
lock_events.h	…
lock_events_list.h	…
lockdep.c	locking/lockdep: Fix buffer overrun problem in stack_trace[]	2019-12-25 10:42:32 +01:00
lockdep_internals.h	…
lockdep_proc.c	…
lockdep_states.h	…
locktorture.c	locking: locktorture: Do not include rwlock.h directly	2019-10-05 11:50:24 -07:00
mcs_spinlock.h	…
mutex-debug.c	…
mutex-debug.h	…
mutex.c	Revert "locking/mutex: Complain upon mutex API misuse in IRQ contexts"	2019-12-11 00:27:43 +01:00
mutex.h	mutex: Fix up mutex_waiter usage	2019-08-08 09:09:25 +02:00
osq_lock.c	…
percpu-rwsem.c	…
qrwlock.c	…
qspinlock.c	…
qspinlock_paravirt.h	Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"	2019-09-25 10:22:37 +02:00
qspinlock_stat.h	…
rtmutex-debug.c	…
rtmutex-debug.h	…
rtmutex.c	locking/lockdep: Remove unused @nested argument from lock_release()	2019-10-09 12:46:10 +02:00
rtmutex.h	…
rtmutex_common.h	…
rwsem.c	locking/rwsem: Fix kernel crash when spinning on RWSEM_OWNER_UNKNOWN	2020-01-17 10:19:27 +01:00
rwsem.h	…
semaphore.c	…
spinlock.c	…
spinlock_debug.c	locking/spinlock/debug: Fix various data races	2019-11-29 08:03:27 +01:00
test-ww_mutex.c	…