WARNING: bad unlock balance in ucma_event

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	WARNING: bad unlock balance in ucma_event_handler	C		error	15	509d	1661d	0/1	upstream: reported C repro on 2019/10/08 08:22
upstream	WARNING: bad unlock balance in ucma_event_handler	C	done		143	1479d	2143d	15/26	fixed on 2020/05/10 10:42

linux-4.19

WARNING: bad unlock balance in ucma_event_handler

error

509d

1661d

0/1

upstream: reported C repro on 2019/10/08 08:22

upstream

WARNING: bad unlock balance in ucma_event_handler

done

143

1479d

2143d

15/26

fixed on 2020/05/10 10:42

Created	Duration	User	Patch	Repo	Result
2022/09/17 09:29	10m	retest repro		linux-4.14.y	report log

Created

Duration

User

Patch

Repo

Result

2022/09/17 09:29

10m

retest repro

linux-4.14.y

report log


Created	Duration	User	Repo	Result
2020/06/30 05:38	29m (2)	bisect fix	linux-4.14.y	job log (2)
2020/05/31 03:28	23m	bisect fix	linux-4.14.y	job log (0) log
2020/05/01 03:02	25m	bisect fix	linux-4.14.y	job log (0) log
2020/04/01 02:37	24m	bisect fix	linux-4.14.y	job log (0) log
2020/03/02 02:12	24m	bisect fix	linux-4.14.y	job log (0) log
2020/02/01 01:31	25m	bisect fix	linux-4.14.y	job log (0) log

===================================== WARNING: bad unlock balance detected! 4.14.301-syzkaller #0 Not tainted ------------------------------------- kworker/u4:0/5 is trying to release lock (&file->mut) at: [<ffffffff85522e4a>] ucma_event_handler+0x6ea/0xeb0 drivers/infiniband/core/ucma.c:377 but there are no more locks to release! other info that might help us debug this: 4 locks held by kworker/u4:0/5: #0: ("ib_addr"){+.+.}, at: [<ffffffff81366130>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088 #1: ((&(&req->work)->work)){+.+.}, at: [<ffffffff81366166>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092 #2: (&id_priv->handler_mutex){+.+.}, at: [<ffffffff854ecf1c>] addr_handler+0x9c/0x420 drivers/infiniband/core/cma.c:2789 #3: (&file->mut){+.+.}, at: [<ffffffff85522812>] ucma_event_handler+0xb2/0xeb0 drivers/infiniband/core/ucma.c:337 stack backtrace: CPU: 1 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.301-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: ib_addr process_one_req Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_unlock_imbalance_bug include/trace/events/lock.h:58 [inline] __lock_release kernel/locking/lockdep.c:3769 [inline] lock_release.cold+0x70/0xbf kernel/locking/lockdep.c:4017 __mutex_unlock_slowpath+0x75/0x770 kernel/locking/mutex.c:1018 ucma_event_handler+0x6ea/0xeb0 drivers/infiniband/core/ucma.c:377 addr_handler+0x1f5/0x420 drivers/infiniband/core/cma.c:2813 process_one_req+0x22e/0x550 drivers/infiniband/core/addr.c:624 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2022/12/13 03:17	linux-4.14.y	65afe34ac33d	67be1ae7	.config	console log	report	syz	C		[disk image] [vmlinux] [kernel image]	ci2-linux-4-14	WARNING: bad unlock balance in ucma_event_handler
2020/01/02 01:31	linux-4.14.y	4c5bf01e16a7	25a0186e	.config	console log	report	syz	C			ci2-linux-4-14
2021/05/12 18:00	linux-4.14.y	7d7d1c0ab3eb	86294427	.config	console log	report			info		ci2-linux-4-14	WARNING: bad unlock balance in ucma_event_handler

Crashes (3):

Assets (help?)