witness: thread exiting with locks held

witness: thread exiting with locks held
Status: closed as dup on 2019/02/21 21:47
Reported-by: syzbot+9938f8e87064d4a6b361@syzkaller.appspotmail.com
First crash: 387d, last: 177d

Duplicate of (1):
Title	Repro	Bisected	Count	Last	Reported
witness: userret: returning with the following locks held:	C		315	177d	387d

duplicates (2):
Title	Repro	Bisected	Count	Last	Reported	Patched	Status
panic: thread ADDR cannotW ARexNiIt NGw:h ilSPeL h oNlOTdi nLgO WsElReEepD lOoNck sSY			1	384d	384d	0/3	closed as dup on 2019/02/01 06:52
panic: thread ADDR cannot exit while holding sleeplocks	syz		23	215d	388d	0/3	closed as dup on 2019/01/28 21:07

Sample crash report:

login: witness: thread 0xffff800020b399e0 exiting with the following locks held:
exclusive rrwlock inode r = 0 (0xfffffd806a587d58) locked @ /syzkaller/managers/multicore/kernel/sys/ufs/ufs/ufs_vnops.c:1547
#0  witness_lock+0x594 sys/kern/subr_witness.c:1205
#1  _rw_enter+0x45d sys/kern/kern_rwlock.c:280
#2  _rrw_enter+0x60 sys/kern/kern_rwlock.c:410
#3  VOP_LOCK+0x57 sys/kern/vfs_vops.c:602
#4  vn_write+0x169 vn_lock sys/kern/vfs_vnops.c:549 [inline]
#4  vn_write+0x169 sys/kern/vfs_vnops.c:393
#5  dofilewritev+0x1b0 sys/kern/sys_generic.c:364
#6  sys_write+0x92 sys/kern/sys_generic.c:284
#7  syscall+0x5b8 mi_syscall sys/sys/syscall_mi.h:99 [inline]
#7  syscall+0x5b8 sys/arch/amd64/amd64/trap.c:574
#8  Xsyscall+0x128
panic: thread 0xffff800020b399e0 cannot exit while holding sleeplocks
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*201819  83779      0     0x14000      0x200    1  reaper
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:399
panic() at panic+0x174 sys/kern/subr_prf.c:208
witness_thread_exit(ffff800020b399e0) at witness_thread_exit+0x283 sys/kern/subr_witness.c:1422
reaper(ffff800020ac1c20) at reaper+0x14f sys/kern/kern_exit.c:412
end trace frame: 0x0, count: 11
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.
ddb{1}> 
ddb{1}> set $lines = 0
ddb{1}> set $maxwidth = 0
ddb{1}>

Crashes (679):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro
ci-openbsd-multicore	2019/03/05 13:53	openbsd	da8fceb2	3419571c	.config	log	report	syz
ci-openbsd-multicore	2019/02/01 04:50	openbsd	dc36d2c7	aa432daf	.config	log	report	syz
ci-openbsd-setuid	2019/01/30 00:47	openbsd	906b732f	aa432daf	.config	log	report	syz
ci-openbsd-setuid	2019/01/29 21:54	openbsd	81059776	aa432daf	.config	log	report	syz
ci-openbsd-multicore	2019/01/29 20:15	openbsd	81059776	aa432daf	.config	log	report	syz
ci-openbsd-multicore	2019/01/29 18:37	openbsd	81059776	aa432daf	.config	log	report	syz
ci-openbsd-multicore	2019/01/29 13:00	openbsd	81059776	aa432daf	.config	log	report	syz
ci-openbsd-multicore	2019/01/29 11:04	openbsd	81059776	aa432daf	.config	log	report	syz
ci-openbsd-setuid	2019/01/29 08:04	openbsd	fabafa7b	aa432daf	.config	log	report	syz
ci-openbsd-setuid	2019/01/29 07:32	openbsd	fabafa7b	aa432daf	.config	log	report	syz
ci-openbsd-setuid	2019/01/29 01:58	openbsd	fabafa7b	aa432daf	.config	log	report	syz
ci-openbsd-multicore	2019/01/29 01:11	openbsd	fabafa7b	aa432daf	.config	log	report	syz
ci-openbsd-setuid	2019/08/27 04:04	openbsd	4350d62e	d21c5d9d	.config	log	report
ci-openbsd-setuid	2019/08/26 08:23	openbsd	56a8f046	d21c5d9d	.config	log	report
ci-openbsd-setuid	2019/08/25 23:34	openbsd	56a8f046	d21c5d9d	.config	log	report
ci-openbsd-setuid	2019/08/25 15:48	openbsd	a1d6d126	d21c5d9d	.config	log	report
ci-openbsd-setuid	2019/08/25 12:10	openbsd	a1d6d126	d21c5d9d	.config	log	report
ci-openbsd-setuid	2019/08/23 03:51	openbsd	9f57e42b	ca6f3cfa	.config	log	report
ci-openbsd-setuid	2019/08/22 17:30	openbsd	d4b29719	c6c81a0b	.config	log	report
ci-openbsd-setuid	2019/08/17 02:36	openbsd	3f6f9f7d	8fd428a1	.config	log	report
ci-openbsd-multicore	2019/08/16 23:04	openbsd	3f6f9f7d	8fd428a1	.config	log	report
ci-openbsd-setuid	2019/08/16 16:14	openbsd	bb94865e	8fd428a1	.config	log	report
ci-openbsd-setuid	2019/08/16 08:53	openbsd	bb94865e	8fd428a1	.config	log	report
ci-openbsd-multicore	2019/08/15 14:09	openbsd	f976af44	0d298d6b	.config	log	report
ci-openbsd-multicore	2019/08/15 11:26	openbsd	f976af44	0d298d6b	.config	log	report
ci-openbsd-setuid	2019/08/15 09:22	openbsd	f976af44	0d298d6b	.config	log	report
ci-openbsd-multicore	2019/08/15 06:05	openbsd	f976af44	0d298d6b	.config	log	report
ci-openbsd-multicore	2019/08/15 05:18	openbsd	f976af44	0d298d6b	.config	log	report
ci-openbsd-multicore	2019/08/15 03:42	openbsd	f976af44	0d298d6b	.config	log	report
ci-openbsd-multicore	2019/08/14 22:59	openbsd	e3943314	5576551b	.config	log	report
ci-openbsd-multicore	2019/08/14 21:42	openbsd	e3943314	5576551b	.config	log	report
ci-openbsd-multicore	2019/08/14 20:37	openbsd	e3943314	5576551b	.config	log	report
ci-openbsd-setuid	2019/08/14 19:34	openbsd	e3943314	5576551b	.config	log	report
ci-openbsd-multicore	2019/08/14 18:28	openbsd	e3943314	5576551b	.config	log	report
ci-openbsd-multicore	2019/08/14 14:18	openbsd	e3943314	5576551b	.config	log	report
ci-openbsd-multicore	2019/08/14 13:03	openbsd	e3943314	5576551b	.config	log	report
ci-openbsd-multicore	2019/08/14 11:28	openbsd	39cbba3c	ef801a3e	.config	log	report
ci-openbsd-multicore	2019/08/14 10:15	openbsd	39cbba3c	ef801a3e	.config	log	report
ci-openbsd-multicore	2019/08/14 09:25	openbsd	39cbba3c	ef801a3e	.config	log	report
ci-openbsd-setuid	2019/08/14 07:48	openbsd	39cbba3c	ef801a3e	.config	log	report
ci-openbsd-multicore	2019/08/14 06:44	openbsd	39cbba3c	ef801a3e	.config	log	report
ci-openbsd-multicore	2019/08/14 05:39	openbsd	39cbba3c	ef801a3e	.config	log	report
ci-openbsd-multicore	2019/08/14 03:24	openbsd	39cbba3c	ef801a3e	.config	log	report
ci-openbsd-multicore	2019/08/14 00:07	openbsd	723403cb	74d61399	.config	log	report
ci-openbsd-setuid	2019/08/13 22:14	openbsd	eb0edb2d	74d61399	.config	log	report
ci-openbsd-multicore	2019/08/13 20:59	openbsd	723403cb	74d61399	.config	log	report
ci-openbsd-multicore	2019/08/13 18:59	openbsd	723403cb	74d61399	.config	log	report
ci-openbsd-multicore	2019/08/13 17:58	openbsd	723403cb	74d61399	.config	log	report
ci-openbsd-multicore	2019/08/13 14:13	openbsd	723403cb	74d61399	.config	log	report
ci-openbsd-multicore	2019/08/13 12:37	openbsd	723403cb	74d61399	.config	log	report
ci-openbsd-multicore	2019/08/13 11:11	openbsd	8c9a8c5f	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/13 10:11	openbsd	8c9a8c5f	8620c2c2	.config	log	report
ci-openbsd-setuid	2019/08/13 08:41	openbsd	8c9a8c5f	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/13 06:39	openbsd	8c9a8c5f	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/12 21:30	openbsd	4e6b438a	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/12 20:07	openbsd	4e6b438a	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/12 18:48	openbsd	4e6b438a	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/12 17:04	openbsd	4e6b438a	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/12 14:22	openbsd	4e6b438a	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/12 12:50	openbsd	4e6b438a	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/12 11:44	openbsd	4e6b438a	8620c2c2	.config	log	report
ci-openbsd-multicore	2019/08/12 10:01	openbsd	4e6b438a	8620c2c2	.config	log	report
ci-openbsd-setuid	2019/08/11 13:58	openbsd	9db55ce6	acb51638	.config	log	report
ci-openbsd-multicore	2019/08/11 07:25	openbsd	9db55ce6	acb51638	.config	log	report
ci-openbsd-setuid	2019/08/10 06:06	openbsd	5a3e12c7	acb51638	.config	log	report
ci-openbsd-setuid	2019/08/10 04:00	openbsd	5a3e12c7	acb51638	.config	log	report
ci-openbsd-setuid	2019/08/09 19:49	openbsd	e875c3a0	aff9e255	.config	log	report
ci-openbsd-multicore	2019/08/09 18:12	openbsd	e875c3a0	aff9e255	.config	log	report
ci-openbsd-pf	2019/03/05 12:50	openbsd	da8fceb2	3419571c	.config	log	report
ci-openbsd-setuid	2019/01/28 21:03	openbsd	fabafa7b	aa432daf	.config	log	report