INFO: task hung in freeze

INFO: task hung in freeze_super
Status: upstream: reported on 2021/01/18 08:18
Reported-by: syzbot+e45cf80926482af211a0@syzkaller.appspotmail.com
First crash: 55d, last: 44m

Sample crash report:

INFO: task kworker/0:1H:2170 blocked for more than 143 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1H    state:D stack:28696 pid: 2170 ppid:     2 flags:0x00004000
Workqueue: glock_workqueue glock_work_func
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106
 __down_write_common kernel/locking/rwsem.c:1261 [inline]
 __down_write_common kernel/locking/rwsem.c:1258 [inline]
 __down_write kernel/locking/rwsem.c:1270 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1407
 freeze_super+0x41/0x330 fs/super.c:1664
 freeze_go_sync+0x1e2/0x330 fs/gfs2/glops.c:574
 do_xmote+0x2ff/0xbc0 fs/gfs2/glock.c:630
 run_queue+0x323/0x680 fs/gfs2/glock.c:767
 glock_work_func+0xff/0x3f0 fs/gfs2/glock.c:934
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
INFO: task syz-executor.1:11638 blocked for more than 143 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:25632 pid:11638 ppid:  8417 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4324 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5075
 schedule+0xcf/0x270 kernel/sched/core.c:5154
 schedule_timeout+0x1db/0x250 kernel/time/timer.c:1868
 do_wait_for_common kernel/sched/completion.c:85 [inline]
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x168/0x270 kernel/sched/completion.c:138
 flush_workqueue+0x3ff/0x13e0 kernel/workqueue.c:2838
 gfs2_gl_hash_clear+0xc8/0x270 fs/gfs2/glock.c:1998
 gfs2_fill_super+0x2005/0x2680 fs/gfs2/ops_fstype.c:1254
 get_tree_bdev+0x440/0x760 fs/super.c:1292
 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1277
 vfs_get_tree+0x89/0x2f0 fs/super.c:1497
 do_new_mount fs/namespace.c:2903 [inline]
 path_mount+0x132a/0x1f90 fs/namespace.c:3233
 do_mount fs/namespace.c:3246 [inline]
 __do_sys_mount fs/namespace.c:3454 [inline]
 __se_sys_mount fs/namespace.c:3431 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3431
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x46741a
RSP: 002b:00007fbe9ca3dfa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 000000000046741a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fbe9ca3e000
RBP: 00007fbe9ca3e040 R08: 00007fbe9ca3e040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000
R13: 0000000020000100 R14: 00007fbe9ca3e000 R15: 0000000020047a20

Showing all locks held in the system:
1 lock held by khungtaskd/1638:
 #0: ffffffff8bf741a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327
3 locks held by kworker/0:1H/2170:
 #0: ffff888143774938 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888143774938 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline]
 #0: ffff888143774938 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff888143774938 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline]
 #0: ffff888143774938 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline]
 #0: ffff888143774938 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2246
 #1: ffffc900085cfda8 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2250
 #2: ffff8880260240e0 (&type->s_umount_key#79){+.+.}-{3:3}, at: freeze_super+0x41/0x330 fs/super.c:1664
1 lock held by in:imklog/8147:
 #0: ffff888023c88ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961
1 lock held by syz-executor.1/11638:
 #0: ffff8880260240e0 (&type->s_umount_key#78/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xab0 fs/super.c:229

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1638 Comm: khungtaskd Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0xfa/0x151 lib/dump_stack.c:120
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
 watchdog+0xd48/0xfb0 kernel/hung_task.c:294
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 303 Comm: kworker/u4:4 Not tainted 5.11.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:write_comp_data kernel/kcov.c:218 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x1d/0x80 kernel/kcov.c:270
Code: 54 c8 20 48 89 10 c3 66 0f 1f 44 00 00 53 41 89 fb 41 89 f1 bf 03 00 00 00 65 48 8b 0c 25 00 f0 01 00 48 89 ce 4c 8b 54 24 08 <e8> 4e f1 ff ff 84 c0 74 51 48 8b 81 b8 14 00 00 44 8b 81 b4 14 00
RSP: 0018:ffffc90001e2fc80 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff888011a68000
RDX: ffff888011a68000 RSI: ffff888011a68000 RDI: 0000000000000003
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff88a33ed9 R11: 0000000000000000 R12: ffffc90001e2fda8
R13: 0000000000000000 R14: dffffc0000000000 R15: 00000000000003dd
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f22fa5c6010 CR3: 0000000011fad000 CR4: 0000000000350ef0
Call Trace:
 rcu_read_unlock include/linux/rcupdate.h:706 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0x779/0xe50 net/batman-adv/network-coding.c:715
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Crashes (112):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-root	2021/02/28 22:24	upstream	cd278456	4c37c133	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-smack-root	2021/02/27 20:42	upstream	5695e516	4c37c133	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-selinux-root	2021/02/27 07:20	upstream	3fb6d0e0	4c37c133	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-smack-root	2021/02/27 05:28	upstream	3fb6d0e0	4c37c133	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-smack-root	2021/02/26 16:28	upstream	2c87f7a3	4c37c133	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-selinux-root	2021/02/26 15:36	upstream	2c87f7a3	4c37c133	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-smack-root	2021/02/26 14:30	upstream	2c87f7a3	4c37c133	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-root	2021/02/26 12:42	upstream	2c87f7a3	76f7fc95	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-root	2021/02/26 11:21	upstream	2c87f7a3	76f7fc95	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-selinux-root	2021/02/26 08:59	upstream	2c87f7a3	76f7fc95	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-selinux-root	2021/02/25 16:20	upstream	29c395c7	76f7fc95	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-smack-root	2021/02/25 14:54	upstream	29c395c7	76f7fc95	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-root	2021/02/25 01:06	upstream	062c84fc	fcc6d71b	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-root	2021/02/24 07:40	upstream	c03c21ba	fcc6d71b	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-kasan-gce-selinux-root	2021/02/24 06:33	upstream	c03c21ba	fcc6d71b	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/26 10:07	linux-next	d01f2f7e	76f7fc95	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/25 09:01	linux-next	7f206cf3	fcc6d71b	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/24 04:51	linux-next	577c2835	fcc6d71b	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/08 22:24	linux-next	aa2b8820	2bd9619f	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/07 08:47	linux-next	aa2b8820	2ce644fc	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/06 16:15	linux-next	aa2b8820	0655e081	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/06 12:06	linux-next	aa2b8820	0655e081	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/05 01:07	linux-next	0e2c50f4	23a562df	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/04 13:00	linux-next	0e2c50f4	42b90a7c	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/04 11:40	linux-next	0e2c50f4	42b90a7c	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/03 22:15	linux-next	58b6c0e5	624dad51	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/03 03:05	linux-next	fb2a9c32	624dad51	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/02 09:01	linux-next	fd821bf0	19e09687	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/02/01 23:25	linux-next	fd821bf0	e6b95f32	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/29 23:20	linux-next	b01f250d	fc9fd31e	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/29 11:22	linux-next	b01f250d	6593fd32	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/28 15:33	linux-next	d03154e8	7df34f59	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/28 11:53	linux-next	d03154e8	eefc07f2	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/28 09:49	linux-next	d03154e8	eefc07f2	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/27 12:15	linux-next	bc085f8f	a0ebf917	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/27 10:09	linux-next	bc085f8f	a0ebf917	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/26 19:31	linux-next	bc085f8f	55a7d4df	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/23 09:01	linux-next	bc085f8f	52e37319	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/22 22:24	linux-next	bc085f8f	4080af96	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/22 20:27	linux-next	bc085f8f	4080af96	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/21 10:27	linux-next	bc085f8f	d4f4eca5	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/21 09:13	linux-next	bc085f8f	d4f4eca5	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/18 16:13	linux-next	93bf8b94	63631df1	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/18 14:53	linux-next	93bf8b94	63631df1	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/18 10:24	linux-next	93bf8b94	fd103621	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/18 04:17	linux-next	b3a3cbde	fd103621	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/17 20:27	linux-next	b3a3cbde	813be542	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/17 17:57	linux-next	b3a3cbde	813be542	.config	log	report	info	INFO: task hung in freeze_super
ci-upstream-linux-next-kasan-gce-root	2021/01/17 14:23	linux-next	b3a3cbde	813be542	.config	log	report	info
ci-upstream-linux-next-kasan-gce-root	2021/01/15 12:09	linux-next	b3a3cbde	65a7a854	.config	log	report	info
ci-upstream-linux-next-kasan-gce-root	2021/01/15 11:45	linux-next	b3a3cbde	65a7a854	.config	log	report	info
ci-upstream-linux-next-kasan-gce-root	2021/01/14 08:13	linux-next	9152a993	269d24e8	.config	log	report	info
ci-upstream-linux-next-kasan-gce-root	2021/01/04 06:02	linux-next	766eff5a	79264ae3	.config	log	report	info