Yang Shi f4dbba5919 locktorture: Fix potential memory leak with rw lock test ... When running locktorture module with the below commands with kmemleak enabled: $ modprobe locktorture torture_type=rw_lock_irq $ rmmod locktorture The below kmemleak got caught: root@10:~# echo scan > /sys/kernel/debug/kmemleak [ 323.197029] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) root@10:~# cat /sys/kernel/debug/kmemleak unreferenced object 0xffffffc07592d500 (size 128): comm "modprobe", pid 368, jiffies 4294924118 (age 205.824s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 c3 7b 02 00 00 00 00 00 .........{...... 00 00 00 00 00 00 00 00 d7 9b 02 00 00 00 00 00 ................ backtrace: [<ffffff80081e5a88>] create_object+0x110/0x288 [<ffffff80086c6078>] kmemleak_alloc+0x58/0xa0 [<ffffff80081d5acc>] __kmalloc+0x234/0x318 [<ffffff80006fa130>] 0xffffff80006fa130 [<ffffff8008083ae4>] do_one_initcall+0x44/0x138 [<ffffff800817e28c>] do_init_module+0x68/0x1cc [<ffffff800811c848>] load_module+0x1a68/0x22e0 [<ffffff800811d340>] SyS_finit_module+0xe0/0xf0 [<ffffff80080836f0>] el0_svc_naked+0x24/0x28 [<ffffffffffffffff>] 0xffffffffffffffff unreferenced object 0xffffffc07592d480 (size 128): comm "modprobe", pid 368, jiffies 4294924118 (age 205.824s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 3b 6f 01 00 00 00 00 00 ........;o...... 00 00 00 00 00 00 00 00 23 6a 01 00 00 00 00 00 ........#j...... backtrace: [<ffffff80081e5a88>] create_object+0x110/0x288 [<ffffff80086c6078>] kmemleak_alloc+0x58/0xa0 [<ffffff80081d5acc>] __kmalloc+0x234/0x318 [<ffffff80006fa22c>] 0xffffff80006fa22c [<ffffff8008083ae4>] do_one_initcall+0x44/0x138 [<ffffff800817e28c>] do_init_module+0x68/0x1cc [<ffffff800811c848>] load_module+0x1a68/0x22e0 [<ffffff800811d340>] SyS_finit_module+0xe0/0xf0 [<ffffff80080836f0>] el0_svc_naked+0x24/0x28 [<ffffffffffffffff>] 0xffffffffffffffff It is because cxt.lwsa and cxt.lrsa don't get freed in module_exit, so free them in lock_torture_cleanup() and free writer_tasks if reader_tasks is failed at memory allocation. Signed-off-by: Yang Shi <yang.shi@linaro.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>		2017-01-14 21:36:06 -08:00
..
lockdep_internals.h	lockdep: Limit static allocations if PROVE_LOCKING_SMALL is defined	2016-11-18 11:33:19 -08:00
lockdep_proc.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
lockdep_states.h	locking: Move the lockdep code to kernel/locking/	2013-11-06 07:55:08 +01:00
lockdep.c	xfs: updates for 4.10-rc1	2016-12-14 21:35:31 -08:00
locktorture.c	locktorture: Fix potential memory leak with rw lock test	2017-01-14 21:36:06 -08:00
Makefile	locking/lglock: Remove lglock implementation	2016-09-22 15:25:56 +02:00
mcs_spinlock.h	locking/core: Remove cpu_relax_lowlatency() users	2016-11-16 10:15:10 +01:00
mutex-debug.c	locking/mutex: Rework mutex::owner	2016-10-25 11:31:50 +02:00
mutex-debug.h	locking/mutex: Rework mutex::owner	2016-10-25 11:31:50 +02:00
mutex.c	locking/mutex: Break out of expensive busy-loop on {mutex,rwsem}_spin_on_owner() when owner vCPU is preempted	2016-11-22 12:48:10 +01:00
mutex.h	locking/mutex: Rework mutex::owner	2016-10-25 11:31:50 +02:00
osq_lock.c	locking/osq: Break out of spin-wait busy waiting loop for a preempted vCPU in osq_lock()	2016-11-22 12:48:10 +01:00
percpu-rwsem.c	locking/percpu-rwsem: Optimize readers and reduce global impact	2016-08-10 14:34:01 +02:00
qrwlock.c	locking/core: Remove cpu_relax_lowlatency() users	2016-11-16 10:15:10 +01:00
qspinlock_paravirt.h	locking/pv-qspinlock: Use cmpxchg_release() in __pv_queued_spin_unlock()	2016-09-22 15:25:51 +02:00
qspinlock_stat.h	don't open-code file_inode()	2016-12-04 18:29:28 -05:00
qspinlock.c	locking/qspinlock: Use __this_cpu_dec() instead of full-blown this_cpu_dec()	2016-06-27 11:37:41 +02:00
rtmutex_common.h	locking/rtmutex: Get rid of RT_MUTEX_OWNER_MASKALL	2016-12-02 11:13:57 +01:00
rtmutex-debug.c	rtmutex: Cleanup deadlock detector debug logic	2014-06-21 22:05:30 +02:00
rtmutex-debug.h	rtmutex: Cleanup deadlock detector debug logic	2014-06-21 22:05:30 +02:00
rtmutex.c	locking/rtmutex: Explain locking rules for rt_mutex_proxy_unlock()/init_proxy_locked()	2016-12-02 11:13:57 +01:00
rtmutex.h	rtmutex: Cleanup deadlock detector debug logic	2014-06-21 22:05:30 +02:00
rwsem-spinlock.c	locking/rwsem: Introduce basis for down_write_killable()	2016-04-13 10:42:20 +02:00
rwsem-xadd.c	locking/mutex: Break out of expensive busy-loop on {mutex,rwsem}_spin_on_owner() when owner vCPU is preempted	2016-11-22 12:48:10 +01:00
rwsem.c	locking/rwsem: Add reader-owned state to the owner field	2016-06-08 15:16:59 +02:00
rwsem.h	locking/rwsem: Protect all writes to owner by WRITE_ONCE()	2016-06-08 15:16:59 +02:00
semaphore.c	locking/semaphore: Resolve some shadow warnings	2014-09-04 07:17:24 +02:00
spinlock_debug.c	locking: Move the spinlock code to kernel/locking/	2013-11-06 07:55:21 +01:00
spinlock.c	spinlock: Add spin_lock_bh_nested()	2015-01-03 14:32:57 -05:00