INFO: task hung in addrconf_verify_work (9)

Status: closed as invalid on 2026/10/06 01:41
Subsystems: net
[Documentation on labels]
First crash: 815d, last: 17h19m
▶ ▼ ✨ AI Jobs (9)
ID Workflow Result Correct Bug Created Started Finished Revision
e63ac594 assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/10/05 17:29 2026/10/05 17:29 2026/10/05 17:45 1995e6c7
1c6f2503 assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/09/04 12:13 2026/09/04 12:13 2026/09/04 12:35 801f0966
623a77d1 assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/08/05 00:07 2026/08/05 00:07 2026/08/05 00:07 d4abbeac
0ea66224 assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/07/05 09:46 2026/07/05 09:46 2026/07/05 10:12 93f57954
577afd0e assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/06/18 09:26 2026/06/18 09:26 2026/06/18 09:38 b62b3ded
af39308d assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/06/10 05:43 2026/06/10 05:43 2026/06/10 06:05 34dab4be
db7144a5 assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/06/04 09:03 2026/06/04 09:03 2026/06/04 09:19 62fe1528
a05493c6 assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/06/02 08:12 2026/06/02 08:12 2026/06/02 08:41 1095583b
5462f57a assessment-security 💥 INFO: task hung in addrconf_verify_work (9) 2026/05/23 07:07 2026/05/23 07:07 2026/05/23 07:29 c69befb3
▶ ▼ Similar bugs (71)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-49 INFO: task hung in addrconf_verify_work 1 18 2560d 2732d 0/3 auto-closed as invalid on 2020/01/31 12:44
linux-6.1 INFO: task hung in addrconf_verify_work (2) 1 46 644d 980d 0/3 auto-obsoleted due to no activity on 2025/04/10 16:42
linux-4.19 INFO: task hung in addrconf_verify_work (5) 1 3 1546d 1585d 0/1 auto-obsoleted due to no activity on 2022/11/10 09:18
linux-4.19 INFO: task hung in addrconf_verify_work (6) 1 syz, C error 4 1327d 1387d 0/1 upstream: reported C repro on 2022/12/19 15:22
linux-4.19 INFO: task hung in addrconf_verify_work (3) 1 1 2033d 2033d 0/1 auto-closed as invalid on 2021/07/11 07:19
linux-4.19 INFO: task hung in addrconf_verify_work (4) 1 6 1727d 1814d 0/1 auto-closed as invalid on 2022/05/13 00:19
linux-4.14 INFO: task hung in addrconf_verify_work (2) 1 syz, C error 7 1325d 2169d 0/1 upstream: reported C repro on 2020/10/28 05:47
upstream INFO: task hung in addrconf_verify_work (2) net 1 syz, C 22 2549d 2549d 13/29 fixed on 2019/11/04 14:50
linux-4.19 INFO: task hung in addrconf_verify_work (2) 1 2 2173d 2262d 0/1 auto-closed as invalid on 2021/02/21 08:05
linux-5.15 INFO: task hung in addrconf_verify_work missing-backport 1 syz, C done 53 826d 868d 0/3 auto-obsoleted due to no activity on 2024/10/23 03:15
android-414 INFO: task hung in addrconf_verify_work 1 syz, C 6 2549d 2734d 0/1 public: reported C repro on 2019/04/12 00:01
upstream INFO: task hung in addrconf_verify_work (8) net 1 syz, C error 1294 818d 1023d 26/29 fixed on 2024/07/09 19:14
android-44 INFO: task hung in addrconf_verify_work 1 3 3066d 3095d 0/2 auto-closed as invalid on 2019/02/22 14:29
linux-4.19 INFO: task hung in addrconf_verify_work 1 1 2392d 2392d 0/1 auto-closed as invalid on 2020/07/16 23:17
linux-6.1 INFO: task hung in addrconf_verify_work (3) 1 3 273d 332d 0/3 auto-obsoleted due to no activity on 2026/04/16 07:08
upstream INFO: task hung in addrconf_verify_work (3) 1 syz, C done 75 2163d 2197d 15/29 fixed on 2020/11/16 12:12
upstream INFO: task hung in addrconf_verify_work (5) net 1 syz, C done done 68 1741d 1833d 0/29 closed as invalid on 2022/02/01 17:39
upstream INFO: task hung in addrconf_verify_work (7) netfilter 1 syz, C error 64 1041d 1188d 0/29 closed as invalid on 2023/12/01 14:19
linux-5.15 INFO: task hung in addrconf_verify_work (2) 1 1 240d 240d 0/3 auto-obsoleted due to no activity on 2026/05/18 23:02
linux-6.1 INFO: task hung in addrconf_verify_work 1 2 1250d 1301d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:09
linux-6.1 INFO: task hung in addrconf_verify_work (4) 1 syz error 3 24d 120d 0/3 upstream: reported syz repro on 2026/06/07 23:30
linux-4.14 INFO: task hung in addrconf_verify_work 1 4 2318d 2390d 0/1 auto-closed as invalid on 2020/09/29 04:19
upstream INFO: task hung in addrconf_verify_work net 1 syz, C 2 3115d 3115d 0/29 closed as invalid on 2018/03/27 11:14
upstream INFO: task hung in addrconf_verify_work (4) 1 syz, C done 132 2054d 2141d 20/29 fixed on 2021/04/09 19:46
upstream INFO: task hung in addrconf_verify_work (6) 1 syz, C done 86 1323d 1561d 22/29 fixed on 2023/02/24 13:51
linux-6.6 INFO: task hung in addrconf_verify_work 1 13 21h59m 291d 0/2 upstream: reported on 2025/12/19 17:57
linux-6.1 INFO: rcu detected stall in corrupted origin:upstream missing-backport 1 syz, C inconclusive 4060 9d07h 1303d 0/3 upstream: reported C repro on 2023/03/13 04:03
upstream INFO: task hung in inet_rtm_newaddr prio:normal net 1 syz, C done 268 6h08m 649d 26/29 upstream: reported C repro on 2024/12/26 09:45
upstream INFO: task hung in addrconf_dad_work (5) prio:normal net 1 syz, C done 2858 1h52m 799d 0/29 upstream: reported C repro on 2024/07/29 15:23
upstream INFO: task hung in exit_aio (4) fs 1 6 662d 728d 0/29 auto-obsoleted due to no activity on 2025/03/13 05:51
android-5-15 BUG: soft lockup in corrupted origin:upstream 1 syz, C error 33 751d 908d 0/2 upstream: reported C repro on 2024/04/11 09:01
upstream BUG: workqueue lockup (5) prio:low kernel 1 syz, C done 17897 2h29m 2456d 0/29 upstream: reported C repro on 2020/01/14 22:04
upstream INFO: task hung in nsim_destroy (4) prio:high net 1 syz, C error error 518 1d20h 858d 0/29 upstream: reported C repro on 2024/05/31 11:16
upstream INFO: task hung in hub_port_init (3) prio:low usb 1 syz, C error 1185 1d07h 1288d 0/29 upstream: reported C repro on 2023/03/28 12:23
upstream INFO: task hung in reg_process_self_managed_hints prio:high wireless 1 syz, C done 1677 6h15m 1142d 0/29 upstream: reported C repro on 2023/08/21 16:36
linux-6.6 INFO: rcu detected stall in corrupted origin:lts-only 1 syz, C done 122 1d11h 470d 0/2 upstream: reported C repro on 2025/06/23 09:19
upstream INFO: rcu detected stall in corrupted (4) prio:low wireless 1 syz, C done inconclusive 859 19h37m 2222d 0/29 upstream: reported C repro on 2020/09/04 18:49
linux-4.14 BUG: soft lockup in corrupted 1 syz, C error 12 1528d 2011d 0/1 upstream: reported C repro on 2021/04/04 06:30
upstream INFO: task hung in reg_check_chans_work (7) prio:normal wireless 1 syz, C error 1879 12d 743d 0/29 upstream: reported C repro on 2024/09/23 08:39
android-6-12 INFO: rcu detected stall in corrupted origin:lts 1 syz 2 225d 345d 0/1 auto-obsoleted due to no activity on 2026/05/24 04:58
upstream INFO: task hung in linkwatch_event (4) prio:low net 1 syz, C done 5256 1h38m 801d 0/29 upstream: reported C repro on 2024/07/27 06:21
linux-4.19 INFO: rcu detected stall in corrupted 1 syz, C error 2 1720d 2427d 0/1 upstream: reported C repro on 2020/02/13 05:06
upstream INFO: task hung in uevent_show (2) kernel 1 syz, C inconclusive 8325 457d 696d 29/29 fixed on 2025/07/17 21:22
upstream INFO: task hung in read_part_sector (2) prio:low block 1 syz error error 82137 27m 792d 0/29 upstream: reported syz repro on 2024/08/04 19:22
linux-4.19 BUG: soft lockup in corrupted 1 syz, C error 3 1556d 1744d 0/1 upstream: reported C repro on 2021/12/26 20:46
linux-5.15 INFO: rcu detected stall in corrupted origin:lts-only 1 syz, C error 188 1d10h 1079d 0/3 upstream: reported C repro on 2023/10/23 02:41
upstream INFO: rcu detected stall in sys_symlinkat (5) prio:normal tomoyo mm 1 syz error error 136 1d20h 671d 0/29 upstream: reported syz repro on 2024/12/04 02:45
upstream INFO: rcu detected stall in sys_symlinkat (3) ext4 1 3 1165d 1218d 0/29 auto-obsoleted due to no activity on 2023/10/26 22:46
linux-6.1 INFO: rcu detected stall in sys_symlinkat (3) origin:upstream 1 syz error 5 115d 521d 0/3 upstream: reported syz repro on 2025/05/03 06:00
linux-5.15 INFO: rcu detected stall in sys_symlinkat 1 1 1229d 1229d 0/3 auto-obsoleted due to no activity on 2023/09/03 15:54
linux-5.15 INFO: rcu detected stall in sys_symlinkat (5) 1 1 25d 25d 0/3 upstream: reported on 2026/09/11 05:55
linux-5.15 INFO: rcu detected stall in sys_symlinkat (3) 1 2 841d 866d 0/3 auto-obsoleted due to no activity on 2024/09/25 17:37
linux-6.1 INFO: rcu detected stall in sys_symlinkat (2) 1 1 1013d 1013d 0/3 auto-obsoleted due to no activity on 2024/04/06 00:16
upstream INFO: rcu detected stall in sys_symlinkat kvm 1 5 1498d 1598d 0/29 auto-obsoleted due to no activity on 2022/11/28 07:06
linux-6.1 INFO: rcu detected stall in sys_symlinkat 1 1 1258d 1258d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:07
upstream INFO: rcu detected stall in sys_symlinkat (2) ext4 lsm 1 2 1311d 1404d 0/29 auto-obsoleted due to no activity on 2023/06/03 10:14
linux-6.6 INFO: rcu detected stall in sys_symlinkat (2) 1 1 12d 12d 0/2 upstream: reported on 2026/09/24 02:58
upstream INFO: rcu detected stall in sys_symlinkat (4) ext4 1 1 1042d 1042d 0/29 auto-obsoleted due to no activity on 2024/02/27 04:07
linux-5.15 INFO: rcu detected stall in sys_symlinkat (4) 1 2 257d 279d 0/3 auto-obsoleted due to no activity on 2026/05/02 14:14
linux-6.6 INFO: rcu detected stall in sys_symlinkat 1 1 220d 220d 0/2 auto-obsoleted due to no activity on 2026/06/08 11:28
linux-5.15 INFO: rcu detected stall in sys_symlinkat (2) 1 1 1038d 1038d 0/3 auto-obsoleted due to no activity on 2024/03/12 11:22
android-5-15 BUG: soft lockup in sys_symlinkat 1 13 813d 904d 0/2 auto-obsoleted due to no activity on 2024/10/13 01:26
android-5-15 BUG: soft lockup in sys_openat (2) origin:lts 1 syz, C error 5 756d 805d 0/2 auto-obsoleted due to no activity on 2024/12/19 09:52
linux-6.1 INFO: rcu detected stall in sys_openat 1 3 1124d 1157d 0/3 auto-obsoleted due to no activity on 2023/12/16 21:24
android-5-10 BUG: soft lockup in sys_openat 1 1 379d 379d 0/2 auto-obsoleted due to no activity on 2025/12/20 20:57
android-5-15 BUG: soft lockup in sys_openat 1 21 856d 912d 0/2 auto-obsoleted due to no activity on 2024/07/21 23:03
linux-5.15 INFO: rcu detected stall in sys_openat missing-backport origin:upstream 1 syz, C done 87 9d12h 1204d 0/3 upstream: reported C repro on 2023/06/19 20:52
linux-6.6 INFO: rcu detected stall in sys_openat origin:lts-only 1 syz, C inconclusive 22 11d 453d 0/2 upstream: reported C repro on 2025/07/10 07:34
linux-6.1 INFO: rcu detected stall in sys_openat (2) origin:upstream 1 syz, C error 70 1d20h 937d 0/3 upstream: reported C repro on 2024/03/13 11:37
upstream INFO: rcu detected stall in sys_openat (3) prio:low mm 1 syz, C error 778 28m 1129d 0/29 upstream: reported C repro on 2023/09/03 11:10
upstream INFO: rcu detected stall in sys_openat (2) kernfs 1 8 1705d 1917d 0/29 closed as invalid on 2022/02/08 09:50
▶ ▼ Cause bisection attempts (1)
Created Duration User Patch Repo Result
2026/09/20 18:33 0m bisect net error

Sample crash report:
INFO: task kworker/u4:0:11 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0    state:D stack:20016 pid:11    tgid:11    ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4736
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task kworker/u4:2:30 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:2    state:D stack:20880 pid:30    tgid:30    ppid:2      flags:0x00004000
Workqueue: events_unbound linkwatch_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 linkwatch_event+0xe/0x60 net/core/link_watch.c:276
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task kworker/u4:9:1088 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:9    state:D stack:21816 pid:1088  tgid:1088  ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 wg_destruct+0x25/0x2e0 drivers/net/wireguard/device.c:246
 netdev_run_todo+0xe1a/0x1000 net/core/dev.c:10809
 default_device_exit_batch+0xa24/0xaa0 net/core/dev.c:11949
 ops_exit_list net/core/net_namespace.c:178 [inline]
 cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:626
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
INFO: task dhcpcd:4813 blocked for more than 144 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd          state:D stack:20608 pid:4813  tgid:4813  ppid:4812   flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 devinet_ioctl+0x2ce/0x1aa0 net/ipv4/devinet.c:1112
 inet_ioctl+0x3d7/0x4f0 net/ipv4/af_inet.c:1003
 sock_do_ioctl+0x158/0x460 net/socket.c:1227
 sock_ioctl+0x626/0x8e0 net/socket.c:1346
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f05bbe93d49
RSP: 002b:00007ffdf2754818 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f05bbdc56c0 RCX: 00007f05bbe93d49
RDX: 00007ffdf2764a08 RSI: 0000000000008914 RDI: 000000000000001b
RBP: 00007ffdf2774bc8 R08: 00007ffdf27649c8 R09: 00007ffdf2764978
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdf2764a08 R14: 0000000000000028 R15: 0000000000008914
 </TASK>
INFO: task syz-executor:12977 blocked for more than 144 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21728 pid:12977 tgid:12977 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6eb777fe8c
RSP: 002b:00007ffee51ab330 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f6eb8464620 RCX: 00007f6eb777fe8c
RDX: 0000000000000038 RSI: 00007f6eb8464670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffee51ab384 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f6eb8464670 R15: 0000000000000000
 </TASK>
INFO: task syz.3.3598:13106 blocked for more than 144 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.3598      state:D stack:25280 pid:13106 tgid:13104 ppid:5225   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 __tun_chr_ioctl+0x48c/0x2400 drivers/net/tun.c:3121
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9d4d97dff9
RSP: 002b:00007f9d4e764038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9d4db35f80 RCX: 00007f9d4d97dff9
RDX: 0000000020001440 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007f9d4d9f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9d4db35f80 R15: 00007ffc20b90f38
 </TASK>
INFO: task syz.0.3599:13109 blocked for more than 144 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.3599      state:D stack:25280 pid:13109 tgid:13107 ppid:5221   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 __tun_chr_ioctl+0x48c/0x2400 drivers/net/tun.c:3121
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe322f7dff9
RSP: 002b:00007fe323e1a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe323135f80 RCX: 00007fe322f7dff9
RDX: 0000000020001440 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007fe322ff0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe323135f80 R15: 00007ffe9e5a8138
 </TASK>
INFO: task syz.5.3601:13111 blocked for more than 144 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.3601      state:D stack:25280 pid:13111 tgid:13108 ppid:5241   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 __tun_chr_ioctl+0x48c/0x2400 drivers/net/tun.c:3121
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa57e57dff9
RSP: 002b:00007fa57f405038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa57e735f80 RCX: 00007fa57e57dff9
RDX: 0000000020001440 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007fa57e5f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa57e735f80 R15: 00007ffeb6903378
 </TASK>
INFO: task syz.2.3600:13113 blocked for more than 145 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.3600      state:D stack:25280 pid:13113 tgid:13112 ppid:5231   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 __tun_chr_ioctl+0x48c/0x2400 drivers/net/tun.c:3121
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f806317dff9
RSP: 002b:00007f8063e8e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8063335f80 RCX: 00007f806317dff9
RDX: 0000000020001440 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007f80631f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8063335f80 R15: 00007fffc7d00b98
 </TASK>
INFO: task syz-executor:13128 blocked for more than 145 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23808 pid:13128 tgid:13128 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f823877fe8c
RSP: 002b:00007ffdca1ce6a0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f8239464620 RCX: 00007f823877fe8c
RDX: 0000000000000028 RSI: 00007f8239464670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffdca1ce6f4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f8239464670 R15: 0000000000000000
 </TASK>
Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
INFO: task syz-executor:13129 blocked for more than 145 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23808 pid:13129 tgid:13129 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f21ca77fe8c
RSP: 002b:00007ffef4abd8e0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f21cb464620 RCX: 00007f21ca77fe8c
RDX: 0000000000000028 RSI: 00007f21cb464670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffef4abd934 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f21cb464670 R15: 0000000000000000
 </TASK>
Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
INFO: task syz-executor:13131 blocked for more than 145 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23808 pid:13131 tgid:13131 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7faae037fe8c
RSP: 002b:00007fff0bdba680 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007faae1064620 RCX: 00007faae037fe8c
RDX: 0000000000000028 RSI: 00007faae1064670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff0bdba6d4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007faae1064670 R15: 0000000000000000
 </TASK>
Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
INFO: task syz-executor:13127 blocked for more than 146 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23808 pid:13127 tgid:13127 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4f5f7fe8c
RSP: 002b:00007fff325fc790 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fc4f6c64620 RCX: 00007fc4f5f7fe8c
RDX: 0000000000000028 RSI: 00007fc4f6c64670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff325fc7e4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fc4f6c64670 R15: 0000000000000000
 </TASK>
Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings
INFO: task syz-executor:13136 blocked for more than 146 seconds.
      Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23808 pid:13136 tgid:13136 ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5322 [inline]
 __schedule+0x1895/0x4b30 kernel/sched/core.c:6682
 __schedule_loop kernel/sched/core.c:6759 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:79 [inline]
 rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:744
 __sys_sendto+0x39b/0x4f0 net/socket.c:2214
 __do_sys_sendto net/socket.c:2226 [inline]
 __se_sys_sendto net/socket.c:2222 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2222
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6c0d77fe8c
RSP: 002b:00007ffd31bc1410 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f6c0e464620 RCX: 00007f6c0d77fe8c
RDX: 0000000000000028 RSI: 00007f6c0e464670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffd31bc1464 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f6c0e464670 R15: 0000000000000000
 </TASK>
Future hung task reports are suppressed, see sysctl kernel.hung_task_warnings

Showing all locks held in the system:
3 locks held by kworker/u4:0/11:
 #0: ffff8880366ad948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff8880366ad948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc900003d7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc900003d7d00 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x19/0x30 net/ipv6/addrconf.c:4736
1 lock held by khungtaskd/25:
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e937e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
3 locks held by kworker/u4:2/30:
 #0: ffff88801ac79148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88801ac79148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000050fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000050fd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
4 locks held by kworker/u4:9/1088:
 #0: ffff88801be8b148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88801be8b148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc90002357d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc90002357d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcc6290 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:580
 #3: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: wg_destruct+0x25/0x2e0 drivers/net/wireguard/device.c:246
3 locks held by kworker/0:3/1375:
 #0: ffff88801ac74948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
 #0: ffff88801ac74948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
 #1: ffffc9000275fd00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
 #1: ffffc9000275fd00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
 #2: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
1 lock held by dhcpcd/4813:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1aa0 net/ipv4/devinet.c:1112
2 locks held by getty/4896:
 #0: ffff88801ec510a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000039b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/12977:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz.3.3598/13106:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x48c/0x2400 drivers/net/tun.c:3121
3 locks held by syz.1.3597/13110:
1 lock held by syz.0.3599/13109:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x48c/0x2400 drivers/net/tun.c:3121
1 lock held by syz.5.3601/13111:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x48c/0x2400 drivers/net/tun.c:3121
1 lock held by syz.2.3600/13113:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: __tun_chr_ioctl+0x48c/0x2400 drivers/net/tun.c:3121
1 lock held by syz-executor/13128:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13129:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13131:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13127:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13136:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13153:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13164:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13165:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13167:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13171:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13172:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13187:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13197:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13203:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13204:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13205:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
1 lock held by syz-executor/13213:
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
 #0: ffffffff8fcd2d88 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 25 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00319-gb04ae0f45168 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xff4/0x1040 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Crashes (2352):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/19 07:47 upstream b04ae0f45168 cd6fc0a3 .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root INFO: task hung in addrconf_verify_work
2026/09/07 20:01 net 38b6be101006 680aa3e1 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/09/06 23:12 net 38b6be101006 4f7b22a0 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/06 01:02 upstream 67f0943b394d 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 22:48 upstream 67f0943b394d 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 17:12 upstream 67f0943b394d 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_verify_work
2026/10/04 06:30 upstream a74306e2e676 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 05:16 upstream a74306e2e676 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 04:13 upstream a74306e2e676 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/03 17:32 upstream e767a4ea70a3 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_verify_work
2026/10/03 08:15 upstream e767a4ea70a3 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in addrconf_verify_work
2026/10/02 23:21 upstream ce1e0223d8ad 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 20:59 upstream ce1e0223d8ad 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_verify_work
2026/10/02 19:00 upstream ce1e0223d8ad 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 12:58 upstream ce1e0223d8ad 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root INFO: task hung in addrconf_verify_work
2026/10/02 08:09 upstream d24e8ac715de 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 00:24 upstream d24e8ac715de 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in addrconf_verify_work
2026/10/01 21:44 upstream d24e8ac715de 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/01 17:33 upstream 551c722f4080 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in addrconf_verify_work
2026/10/01 15:09 upstream 551c722f4080 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce INFO: task hung in addrconf_verify_work
2026/09/30 09:04 upstream 6f8319e3e9a4 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root INFO: task hung in addrconf_verify_work
2026/04/06 13:45 upstream 591cd656a1bf 4440e7c2 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto INFO: task hung in addrconf_verify_work
2024/08/09 14:06 upstream ee9a43b7cfe2 61405512 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in addrconf_verify_work
2026/10/04 21:18 upstream 6addb4f38557 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in addrconf_verify_work
2026/10/03 03:04 upstream ce1e0223d8ad 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 INFO: task hung in addrconf_verify_work
2026/10/05 21:29 net aaaaf87ea99b 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 15:25 net aaaaf87ea99b 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 10:17 net 5158353121ba 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 07:06 net 5158353121ba 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 03:59 net 5158353121ba 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 19:40 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 13:05 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 08:00 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 02:55 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 00:13 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/03 23:01 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/03 19:35 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/03 11:16 net 6dc989ea46b9 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/03 06:27 net 71a77ab76e74 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/03 01:21 net 71a77ab76e74 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 15:04 net 71a77ab76e74 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 10:49 net e23a64eb2443 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 09:04 net e23a64eb2443 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 06:22 net e23a64eb2443 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 05:10 net e23a64eb2443 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 04:06 net e23a64eb2443 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 02:11 net e23a64eb2443 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/01 23:10 net e23a64eb2443 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 18:24 net-next 8b4e7209c842 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 11:20 net-next 8b4e7209c842 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 00:50 net-next cfb7793d1bc0 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 23:27 net-next cfb7793d1bc0 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 22:21 net-next cfb7793d1bc0 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 09:59 net-next cfb7793d1bc0 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/04 01:53 net-next cfb7793d1bc0 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/03 13:28 net-next cfb7793d1bc0 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/02 17:20 net-next 071876fd5048 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/05 23:54 linux-next bf1ee2bd5c2d 1995e6c7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/03 04:42 linux-next f0406245cb98 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in addrconf_verify_work
2026/10/01 16:16 linux-next 6474fa070f2b 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce INFO: task hung in addrconf_verify_work
2026/09/26 05:47 linux-next f5f84daefcd9 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root INFO: task hung in addrconf_verify_work
2026/05/04 03:06 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 25bd55f46032 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: task hung in addrconf_verify_work
* Struck through repros no longer work on HEAD.