INFO: task hung in register_netdevice

INFO: task hung in register_netdevice_notifier (2)
Status: upstream: reported on 2019/10/23 07:25
Reported-by: syzbot+355f8edb2ff45d5f95fa@syzkaller.appspotmail.com
First crash: 945d, last: 13h27m

similar bugs (3):
Kernel	Title	Count	Last	Reported	Patched	Status
linux-4.19	INFO: task hung in register_netdevice_notifier	62	28d	679d	0/1	upstream: reported on 2019/04/27 04:10
upstream	INFO: task hung in register_netdevice_notifier	602	1058d	1071d	0/21	closed as invalid on 2018/05/03 10:15
upstream	INFO: task can't die in register_netdevice_notifier	62	8d17h	186d	0/21	upstream: reported on 2020/09/01 19:50

Sample crash report:

INFO: task syz-executor.3:15603 blocked for more than 143 seconds.
      Not tainted 5.12.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:27832 pid:15603 ppid:  8424 flags:0x00000004
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
 register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1844
 bcm_init+0x1a3/0x210 net/can/bcm.c:1449
 can_create+0x27c/0x4d0 net/can/af_can.c:168
 __sock_create+0x3de/0x780 net/socket.c:1408
 sock_create net/socket.c:1459 [inline]
 __sys_socket+0xef/0x200 net/socket.c:1501
 __do_sys_socket net/socket.c:1510 [inline]
 __se_sys_socket net/socket.c:1508 [inline]
 __x64_sys_socket+0x6f/0xb0 net/socket.c:1508
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465f69
RSP: 002b:00007f0a84b28188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d
RBP: 00000000004bfa67 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffe746e6d0f R14: 00007f0a84b28300 R15: 0000000000022000
INFO: task syz-executor.3:15605 blocked for more than 143 seconds.
      Not tainted 5.12.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:28520 pid:15605 ppid:  8424 flags:0x00000004
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
 register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1844
 bcm_init+0x1a3/0x210 net/can/bcm.c:1449
 can_create+0x27c/0x4d0 net/can/af_can.c:168
 __sock_create+0x3de/0x780 net/socket.c:1408
 sock_create net/socket.c:1459 [inline]
 __sys_socket+0xef/0x200 net/socket.c:1501
 __do_sys_socket net/socket.c:1510 [inline]
 __se_sys_socket net/socket.c:1508 [inline]
 __x64_sys_socket+0x6f/0xb0 net/socket.c:1508
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465f69
RSP: 002b:00007f0a84b07188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465f69
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d
RBP: 00000000004bfa67 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffe746e6d0f R14: 00007f0a84b07300 R15: 0000000000022000

Showing all locks held in the system:
1 lock held by khungtaskd/1639:
 #0: ffffffff8bf74220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6327
1 lock held by in:imklog/8114:
 #0: ffff88801ca08870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:961
3 locks held by kworker/u4:11/11133:
1 lock held by syz-executor.3/15603:
 #0: ffffffff8d65abd0 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1844
1 lock held by syz-executor.3/15605:
 #0: ffffffff8d65abd0 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1844

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

NMI backtrace for cpu 0
CPU: 0 PID: 1639 Comm: khungtaskd Not tainted 5.12.0-rc2-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+0x141/0x1d7 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11122 Comm: kworker/u4:8 Not tainted 5.12.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:128 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:177 [inline]
RIP: 0010:kasan_check_range+0xde/0x180 mm/kasan/generic.c:186
Code: 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 80 38 00 <74> f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c 2c eb 0c
RSP: 0018:ffffc90001e3fa40 EFLAGS: 00000046
RAX: fffffbfff1f53d0c RBX: fffffbfff1f53d0d RCX: ffffffff81591151
RDX: fffffbfff1f53d0d RSI: 0000000000000008 RDI: ffffffff8fa9e860
RBP: fffffbfff1f53d0c R08: 0000000000000000 R09: ffffffff8fa9e867
R10: fffffbfff1f53d0c R11: 0000000000000000 R12: ffff888024953780
R13: 0000000000000004 R14: ffff888024954110 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f186e2f5020 CR3: 00000000263f0000 CR4: 0000000000350ee0
Call Trace:
 instrument_atomic_read include/linux/instrumented.h:71 [inline]
 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
 __lock_acquire+0xf61/0x54c0 kernel/locking/lockdep.c:4870
 lock_acquire kernel/locking/lockdep.c:5510 [inline]
 lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5475
 rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
 rcu_read_lock include/linux/rcupdate.h:656 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:404 [inline]
 batadv_nc_worker+0x12d/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 (10327):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-root	2021/03/06 14:17	upstream	a38fd874	e4b4d570	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/03/04 05:51	upstream	f69d02e3	d7e4e604	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/03/03 17:28	upstream	f69d02e3	06ed56cd	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/03/01 23:47	upstream	7a7fd0de	183afb6c	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/24 08:13	upstream	c03c21ba	fcc6d71b	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/23 16:27	upstream	3b9cdafb	fcc6d71b	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/02/19 15:57	upstream	f40ddce8	f689d40a	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/02/17 12:14	upstream	f40ddce8	052f8d9f	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/16 10:41	upstream	f40ddce8	98682e5e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/15 04:57	upstream	f40ddce8	98682e5e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/02/14 04:22	upstream	ac30d8ce	98682e5e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/14 01:24	upstream	ac30d8ce	98682e5e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-selinux-root	2021/02/12 09:48	upstream	dcc0b490	a5f86b15	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/02/11 21:11	upstream	291009f6	a5f86b15	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/10 21:35	upstream	e0756cfc	a52ee10a	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-selinux-root	2021/02/10 08:29	upstream	e0756cfc	2bd9619f	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/09 00:07	upstream	e0756cfc	2bd9619f	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/08 00:15	upstream	b75dba7f	2ce644fc	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-selinux-root	2021/02/07 22:17	upstream	b75dba7f	2ce644fc	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce	2021/02/07 02:11	upstream	964d069f	0655e081	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/02/04 19:47	upstream	61556703	42b90a7c	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/02/04 04:25	upstream	3afe9076	624dad51	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce	2021/02/02 08:24	upstream	88bb507a	19e09687	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/01/31 02:07	upstream	8c947645	fc9fd31e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/01/30 08:15	upstream	0e9bcda5	fc9fd31e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-selinux-root	2021/01/29 22:30	upstream	bec4c296	fc9fd31e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/01/29 10:04	upstream	bec4c296	6593fd32	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce	2021/01/29 00:17	upstream	e5ff2cb9	7df34f59	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-selinux-root	2021/01/28 19:35	upstream	e5ff2cb9	7df34f59	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-smack-root	2021/01/27 07:54	upstream	2ab38c17	55a7d4df	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-selinux-root	2021/01/25 11:29	upstream	6ee1d745	52e37319	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-selinux-root	2021/01/23 22:14	upstream	e1ae4b0b	52e37319	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/01/23 11:19	upstream	fe75a218	52e37319	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-386	2021/02/06 15:36	upstream	1e0d27fc	0655e081	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-386	2021/01/30 00:10	upstream	bec4c296	fc9fd31e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-386	2021/01/25 10:29	upstream	6ee1d745	52e37319	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/02/21 03:00	net	3af409ca	3e5ed8b4	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/02/14 14:24	net	57baf8cc	98682e5e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/02/14 10:17	net	57baf8cc	98682e5e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/02/13 18:21	net	57baf8cc	98682e5e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/02/12 20:34	net	308daa19	98682e5e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/02/05 14:54	net	7b5eab57	23a562df	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/02/03 13:07	net	3aaf0a27	624dad51	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/02/03 08:59	net	3aaf0a27	624dad51	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/01/31 06:28	net	eb4e8fac	fc9fd31e	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-this-kasan-gce	2021/01/22 13:15	net	35c715c3	d4f4eca5	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-kasan-gce	2021/02/28 13:07	net-next	d310ec03	4c37c133	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-kasan-gce	2021/02/19 08:35	net-next	38b5133a	14052202	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-kasan-gce	2021/02/17 08:16	net-next	d489ded1	052f8d9f	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-kasan-gce	2021/02/08 14:59	net-next	badc6ac3	2ce644fc	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-kasan-gce	2021/02/06 23:17	net-next	c90597bd	0655e081	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-kasan-gce	2021/01/28 07:31	net-next	6b2e04bc	eefc07f2	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-kasan-gce	2021/01/22 21:42	net-next	43e57631	4080af96	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-net-kasan-gce	2021/01/22 18:40	net-next	43e57631	d4f4eca5	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-linux-next-kasan-gce-root	2021/02/04 12:05	linux-next	0e2c50f4	42b90a7c	.config	log	report	info	INFO: task hung in register_netdevice_notifier
ci-upstream-kasan-gce-root	2021/01/17 03:22	upstream	0da0a8a0	65a7a854	.config	log	report	info
ci-upstream-kasan-gce-root	2019/10/22 21:33	upstream	3b7c59a1	5681358a	.config	log	report
ci-upstream-bpf-kasan-gce	2020/10/04 07:34	bpf	d82a532a	1a3f9408	.config	log	report	info
ci-upstream-bpf-next-kasan-gce	2020/07/24 01:53	bpf-next	c3cf6317	70c104a1	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2018/08/05 01:50	linux-next	116b181b	3476a2df	.config	log	report