INFO: task hung in gate_exit

INFO: task hung in gate_exit_net
Status: upstream: reported on 2020/07/06 06:21
Reported-by: syzbot+9353377c27f046c26c0c@syzkaller.appspotmail.com
First crash: 294d, last: 6d00h

Sample crash report:

INFO: task kworker/u4:2:74 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/u4:2    state:D stack:25784 pid:   74 ppid:     2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x999/0xe70 kernel/sched/core.c:5078
 schedule+0x14b/0x200 kernel/sched/core.c:5157
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216
 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 tc_action_net_exit include/net/act_api.h:147 [inline]
 gate_exit_net+0x2c/0x100 net/sched/act_gate.c:624
 ops_exit_list net/core/net_namespace.c:190 [inline]
 cleanup_net+0x79c/0xbd0 net/core/net_namespace.c:604
 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275
 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
INFO: task syz-executor.1:11270 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:29280 pid:11270 ppid:  8423 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x999/0xe70 kernel/sched/core.c:5078
 schedule+0x14b/0x200 kernel/sched/core.c:5157
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216
 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 devinet_ioctl+0x294/0x1df0 net/ipv4/devinet.c:1066
 inet_ioctl+0x240/0x2e0 net/ipv4/af_inet.c:967
 sock_do_ioctl+0x7b/0x260 net/socket.c:1037
 sock_ioctl+0x416/0x5f0 net/socket.c:1177
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466019
RSP: 002b:00007f339c443188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466019
RDX: 0000000020000500 RSI: 0000000000008914 RDI: 0000000000000005
RBP: 00000000004bd067 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffca07c1f0f R14: 00007f339c443300 R15: 0000000000022000
INFO: task syz-executor.2:11271 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.2  state:D stack:29280 pid:11271 ppid:  8425 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x999/0xe70 kernel/sched/core.c:5078
 schedule+0x14b/0x200 kernel/sched/core.c:5157
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216
 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 devinet_ioctl+0x294/0x1df0 net/ipv4/devinet.c:1066
 inet_ioctl+0x240/0x2e0 net/ipv4/af_inet.c:967
 sock_do_ioctl+0x7b/0x260 net/socket.c:1037
 sock_ioctl+0x416/0x5f0 net/socket.c:1177
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466019
RSP: 002b:00007f4261809188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466019
RDX: 0000000020000500 RSI: 0000000000008914 RDI: 0000000000000005
RBP: 00000000004bd067 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffdaa765e0f R14: 00007f4261809300 R15: 0000000000022000
INFO: task syz-executor.5:11315 blocked for more than 144 seconds.
      Not tainted 5.11.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:28640 pid:11315 ppid:     1 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4327 [inline]
 __schedule+0x999/0xe70 kernel/sched/core.c:5078
 schedule+0x14b/0x200 kernel/sched/core.c:5157
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216
 __mutex_lock_common+0x124f/0x2f00 kernel/locking/mutex.c:1033
 __mutex_lock kernel/locking/mutex.c:1103 [inline]
 mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118
 rtnl_lock net/core/rtnetlink.c:72 [inline]
 rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550
 netlink_rcv_skb+0x190/0x3a0 net/netlink/af_netlink.c:2494
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x786/0x940 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x9ae/0xd50 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg net/socket.c:672 [inline]
 __sys_sendto+0x438/0x5c0 net/socket.c:1975
 __do_sys_sendto net/socket.c:1987 [inline]
 __se_sys_sendto net/socket.c:1983 [inline]
 __x64_sys_sendto+0xda/0xf0 net/socket.c:1983
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4194ac
RSP: 002b:00007ffd2715a6e0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00000000014a4320 RCX: 00000000004194ac
RDX: 0000000000000028 RSI: 00000000014a4370 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd2715a734 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00000000014a4370 R14: 0000000000000003 R15: 0000000000000000

Showing all locks held in the system:
4 locks held by kworker/u4:2/74:
 #0: ffff8881407ab138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2248
 #1: ffffc9000101fd78 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2250
 #2: ffffffff8d6e2f30 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xac/0xbd0 net/core/net_namespace.c:566
 #3: ffffffff8d6ee888 (rtnl_mutex){+.+.}-{3:3}, at: tc_action_net_exit include/net/act_api.h:147 [inline]
 #3: ffffffff8d6ee888 (rtnl_mutex){+.+.}-{3:3}, at: gate_exit_net+0x2c/0x100 net/sched/act_gate.c:624
1 lock held by khungtaskd/1647:
 #0: ffffffff8c711680 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151
1 lock held by in:imklog/8083:
 #0: ffff888015421770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947
3 locks held by kworker/1:3/8188:
 #0: ffff88802260cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x6f4/0xfc0 kernel/workqueue.c:2248
 #1: ffffc9000c6afd78 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2250
 #2: ffffffff8d6ee888 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4570
3 locks held by kworker/u4:6/9860:
 #0: ffff8880b9d34758 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1320 [inline]
 #0: ffff8880b9d34758 (&rq->lock){-.-.}-{2:2}, at: __schedule+0xd8/0xe70 kernel/sched/core.c:4995
 #1: ffff8880b9d1ff48 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x224/0x5c0 kernel/sched/psi.c:833
 #2: ffff88801d1219d8 (key#15){+...}-{2:2}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:258
1 lock held by syz-executor.4/11263:
1 lock held by syz-executor.1/11270:
 #0: ffffffff8d6ee888 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x294/0x1df0 net/ipv4/devinet.c:1066
1 lock held by syz-executor.2/11271:
 #0: ffffffff8d6ee888 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x294/0x1df0 net/ipv4/devinet.c:1066
1 lock held by syz-executor.5/11315:
 #0: ffffffff8d6ee888 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8d6ee888 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x83a/0xd60 net/core/rtnetlink.c:5550

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

NMI backtrace for cpu 0
CPU: 0 PID: 1647 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+0x137/0x1be lib/dump_stack.c:120
 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x191/0x2f0 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+0xce9/0xd30 kernel/hung_task.c:294
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 809 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:check_preemption_disabled+0x9/0x190 lib/smp_processor_id.c:13
Code: cc 0f 1f 44 00 00 48 c7 c7 00 d2 0d 8a 48 c7 c6 40 d2 0d 8a eb 0b 66 66 2e 0f 1f 84 00 00 00 00 00 55 41 57 41 56 41 55 41 54 <53> 48 83 ec 10 49 89 f6 49 89 ff 65 48 8b 04 25 28 00 00 00 48 89
RSP: 0018:ffffc900031efaf8 EFLAGS: 00000046
RAX: 0000000000000002 RBX: 0000000000000002 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff89ae8b20 RDI: ffffffff8a0dd280
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff1b6727e
R10: fffffbfff1b6727e R11: 0000000000000000 R12: 0000000000000246
R13: ffff88801380d340 R14: 00000000ffffffff R15: ffffffff8c7115e0
FS:  0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9730cec000 CR3: 000000006ea4b000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 lockdep_recursion_finish kernel/locking/lockdep.c:437 [inline]
 lock_is_held_type+0xf8/0x160 kernel/locking/lockdep.c:5482
 lock_is_held include/linux/lockdep.h:271 [inline]
 rcu_read_lock_sched_held+0x41/0xb0 kernel/rcu/update.c:123
 trace_lock_acquire+0x6b/0x180 include/trace/events/lock.h:13
 lock_acquire+0x39/0x5e0 kernel/locking/lockdep.c:5413
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:259
 rcu_read_lock include/linux/rcupdate.h:648 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:404 [inline]
 batadv_nc_worker+0xc8/0x5c0 net/batman-adv/network-coding.c:715
 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275
 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421
 kthread+0x39a/0x3c0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Crashes (45):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-smack-root	2021/02/20 01:17	upstream	f40ddce8	f689d40a	.config	log	report	info	INFO: task hung in gate_exit_net
ci-upstream-kasan-gce-386	2021/01/31 02:35	upstream	8c947645	fc9fd31e	.config	log	report	info	INFO: task hung in gate_exit_net
ci-upstream-net-this-kasan-gce	2021/02/04 23:57	net	d795cc02	23a562df	.config	log	report	info	INFO: task hung in gate_exit_net
ci-upstream-net-this-kasan-gce	2021/02/01 06:09	net	eb4e8fac	fc9fd31e	.config	log	report	info	INFO: task hung in gate_exit_net
ci-upstream-net-kasan-gce	2021/04/15 23:56	net-next	3a1aa533	c59079a6	.config	log	report	info	INFO: task hung in gate_exit_net
ci-upstream-net-kasan-gce	2021/01/31 09:14	net-next	14e8e0f6	fc9fd31e	.config	log	report	info	INFO: task hung in gate_exit_net
ci-upstream-net-kasan-gce	2021/01/28 06:06	net-next	6b2e04bc	eefc07f2	.config	log	report	info	INFO: task hung in gate_exit_net
ci-upstream-net-kasan-gce	2021/01/27 23:59	net-next	6b2e04bc	eefc07f2	.config	log	report	info	INFO: task hung in gate_exit_net
ci-upstream-kasan-gce-smack-root	2020/12/08 17:59	upstream	cd796ed3	a7f7f4a4	.config	log	report	info
ci-upstream-kasan-gce-selinux-root	2020/10/06 12:38	upstream	7575fdda	1880b4a9	.config	log	report	info
ci-upstream-kasan-gce-root	2020/10/06 03:36	upstream	7575fdda	1880b4a9	.config	log	report	info
ci-upstream-net-this-kasan-gce	2021/01/05 21:51	net	a8f33c03	a0234d98	.config	log	report	info
ci-upstream-net-this-kasan-gce	2021/01/02 14:33	net	4bfc4714	79264ae3	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/12/19 04:13	net	d64c6f96	04201c06	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/12/17 17:45	net	3ae32c07	04201c06	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/11/08 17:42	net	4e0396c5	64069d48	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/10/12 22:42	net	8098bd69	d32b0bbf	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/10/06 08:10	net	4296adc3	1880b4a9	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/10/05 04:59	net	580e4273	5ef9c291	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/10/02 07:59	net	bb13a800	9602ddf4	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/09/29 16:00	net	1aad8049	1b88c6d5	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/09/29 15:11	net	1aad8049	1b88c6d5	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/09/29 00:17	net	709a16be	6bfdbe89	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/09/28 23:52	net	709a16be	6bfdbe89	.config	log	report	info
ci-upstream-net-this-kasan-gce	2020/07/17 21:02	net	473309fb	9c812472	.config	log	report
ci-upstream-net-kasan-gce	2021/01/06 08:14	net-next	f6e7a024	b1c228e1	.config	log	report	info
ci-upstream-net-kasan-gce	2021/01/01 15:04	net-next	3db1a3fa	79264ae3	.config	log	report	info
ci-upstream-net-kasan-gce	2020/12/29 23:37	net-next	3db1a3fa	80910769	.config	log	report	info
ci-upstream-net-kasan-gce	2020/12/26 19:17	net-next	3db1a3fa	821e0b09	.config	log	report	info
ci-upstream-net-kasan-gce	2020/12/17 08:49	net-next	3db1a3fa	04201c06	.config	log	report	info
ci-upstream-net-kasan-gce	2020/12/08 15:32	net-next	b1f7b098	51a9082e	.config	log	report	info
ci-upstream-net-kasan-gce	2020/11/23 09:46	net-next	f9e425e9	0d27f508	.config	log	report	info
ci-upstream-net-kasan-gce	2020/11/20 06:52	net-next	657bc1d1	0767f13f	.config	log	report	info
ci-upstream-net-kasan-gce	2020/11/16 05:41	net-next	0064c5c1	1bf9a662	.config	log	report	info
ci-upstream-net-kasan-gce	2020/11/14 06:54	net-next	774626fa	1bf9a662	.config	log	report	info
ci-upstream-net-kasan-gce	2020/11/13 13:13	net-next	95530a59	16fca0c8	.config	log	report	info
ci-upstream-net-kasan-gce	2020/11/08 17:58	net-next	bff6f1db	64069d48	.config	log	report	info
ci-upstream-net-kasan-gce	2020/11/08 13:12	net-next	bff6f1db	64069d48	.config	log	report	info
ci-upstream-net-kasan-gce	2020/10/29 22:31	net-next	cd29296f	a0c7169a	.config	log	report	info
ci-upstream-net-kasan-gce	2020/10/19 02:11	net-next	9ff9b0d3	fea47c01	.config	log	report	info
ci-upstream-net-kasan-gce	2020/10/06 14:37	net-next	8b0308fe	1880b4a9	.config	log	report	info
ci-upstream-net-kasan-gce	2020/07/01 15:24	net-next	2b04a661	39acb39d	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/10/02 17:44	linux-next	2172e358	4969d6ca	.config	log	report	info
ci-upstream-linux-next-kasan-gce-root	2020/10/01 03:22	linux-next	de69ee6d	8516f6d3	.config	log	report	info
ci-upstream-linux-next-kasan-gce-root	2020/09/28 21:15	linux-next	663b07a4	6bfdbe89	.config	log	report	info