syzbot


INFO: task hung in rtnl_lock (3)

Status: upstream: reported C repro on 2024/05/20 16:41
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+3a7ea61612e7685fc7f2@syzkaller.appspotmail.com
First crash: 325d, last: 9d09h
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2024/09/04 upstream (ToT) 88fac17500f4 C [report] INFO: task hung in rtnl_lock
Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in rtnl_lock 41 1891d 1992d 0/1 auto-closed as invalid on 2020/06/04 06:12
upstream INFO: task hung in rtnl_lock (2) net 1 1138d 1138d 0/28 auto-closed as invalid on 2022/05/28 17:21
linux-5.15 INFO: task hung in rtnl_lock (2) 1 456d 456d 0/3 auto-obsoleted due to no activity on 2024/04/18 21:58
linux-4.14 INFO: task hung in rtnl_lock 12 1882d 1992d 0/1 auto-closed as invalid on 2020/06/13 20:56
android-49 INFO: task hung in rtnl_lock 7 1954d 1993d 0/3 auto-closed as invalid on 2020/04/01 22:32
linux-6.1 INFO: task hung in rtnl_lock 7 613d 735d 0/3 auto-obsoleted due to no activity on 2023/11/14 10:24
linux-6.1 INFO: task hung in rtnl_lock (2) origin:lts-only C inconclusive 344 2d05h 486d 0/3 upstream: reported C repro on 2023/12/11 07:58
upstream INFO: task hung in rtnl_lock (3) net C 128 385d 736d 25/28 fixed on 2024/03/26 17:39
upstream INFO: task hung in rtnl_lock net 118 1793d 1739d 0/28 auto-closed as invalid on 2020/09/10 12:52
linux-5.15 INFO: task hung in rtnl_lock 4 610d 735d 0/3 auto-obsoleted due to no activity on 2023/11/17 15:29
Last patch testing requests (9)
Created Duration User Patch Repo Result
2025/03/21 00:04 41m retest repro linux-5.15.y report log
2025/03/21 00:04 16m retest repro linux-5.15.y report log
2025/03/21 00:04 19m retest repro linux-5.15.y report log
2025/03/21 00:04 17m retest repro linux-5.15.y report log
2025/03/21 00:04 19m retest repro linux-5.15.y report log
2025/03/06 20:37 17m retest repro linux-5.15.y report log
2025/03/06 20:37 17m retest repro linux-5.15.y report log
2025/03/06 20:37 17m retest repro linux-5.15.y report log
2025/03/06 20:37 17m retest repro linux-5.15.y report log

Sample crash report:
INFO: task kworker/u4:3:293 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:3    state:D stack:    0 pid:  293 ppid:     2 flags:0x00000008
Workqueue: events_unbound linkwatch_event
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 linkwatch_event+0x14/0x68 net/core/link_watch.c:251
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
INFO: task dhcpcd:3696 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd          state:D stack:    0 pid: 3696 ppid:     1 flags:0x00000804
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 vlan_ioctl_handler+0x1ec/0xafc net/8021q/vlan.c:555
 sock_ioctl+0x5b0/0x8b0 net/socket.c:1221
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x1fc/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task kworker/1:3:4116 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3     state:D stack:    0 pid: 4116 ppid:     2 flags:0x00000008
Workqueue: events switchdev_deferred_process_work
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 switchdev_deferred_process_work+0x14/0x28 net/switchdev/switchdev.c:74
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
INFO: task kworker/0:5:4130 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:5     state:D stack:    0 pid: 4130 ppid:     2 flags:0x00000008
Workqueue: ipv6_addrconf addrconf_dad_work
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 addrconf_dad_work+0xd0/0x12f4 net/ipv6/addrconf.c:4113
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
INFO: task kworker/1:4:4156 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4     state:D stack:    0 pid: 4156 ppid:     2 flags:0x00000008
Workqueue: ipv6_addrconf addrconf_dad_work
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 addrconf_dad_work+0xd0/0x12f4 net/ipv6/addrconf.c:4113
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
INFO: task syz-executor:6935 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:    0 pid: 6935 ppid:     1 flags:0x00000001
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 devinet_ioctl+0x278/0x17ec net/ipv4/devinet.c:1077
 inet_ioctl+0x2b0/0x504 net/ipv4/af_inet.c:987
 sock_do_ioctl+0x134/0x2dc net/socket.c:1140
 sock_ioctl+0x4f4/0x8b0 net/socket.c:1257
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task syz-executor:7223 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:    0 pid: 7223 ppid:     1 flags:0x00000009
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 ip_tunnel_init_net+0x1d0/0x5b0 net/ipv4/ip_tunnel.c:1097
 ipgre_init_net+0x34/0x44 net/ipv4/ip_gre.c:1034
 ops_init+0x2e4/0x54c net/core/net_namespace.c:138
 setup_net+0x378/0xa64 net/core/net_namespace.c:333
 copy_net_ns+0x2f8/0x5e0 net/core/net_namespace.c:486
 create_new_namespaces+0x330/0x61c kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x108/0x158 kernel/nsproxy.c:226
 ksys_unshare+0x424/0x7e4 kernel/fork.c:3099
 __do_sys_unshare kernel/fork.c:3173 [inline]
 __se_sys_unshare kernel/fork.c:3171 [inline]
 __arm64_sys_unshare+0x3c/0x50 kernel/fork.c:3171
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task syz-executor:7228 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:    0 pid: 7228 ppid:     1 flags:0x00000009
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 ip_tunnel_init_net+0x1d0/0x5b0 net/ipv4/ip_tunnel.c:1097
 erspan_init_net+0x38/0x48 net/ipv4/ip_gre.c:1723
 ops_init+0x2e4/0x54c net/core/net_namespace.c:138
 setup_net+0x378/0xa64 net/core/net_namespace.c:333
 copy_net_ns+0x2f8/0x5e0 net/core/net_namespace.c:486
 create_new_namespaces+0x330/0x61c kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x108/0x158 kernel/nsproxy.c:226
 ksys_unshare+0x424/0x7e4 kernel/fork.c:3099
 __do_sys_unshare kernel/fork.c:3173 [inline]
 __se_sys_unshare kernel/fork.c:3171 [inline]
 __arm64_sys_unshare+0x3c/0x50 kernel/fork.c:3171
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task syz.8.2717:7256 blocked for more than 143 seconds.
      Not tainted 5.15.179-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.2717      state:D stack:    0 pid: 7256 ppid:  6926 flags:0x00000001
Call trace:
 __switch_to+0x308/0x588 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5029 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6375
 schedule+0x11c/0x1c8 kernel/sched/core.c:6458
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6517
 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 rtnl_lock net/core/rtnetlink.c:72 [inline]
 rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2489
 rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5665
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 ____sys_sendmsg+0x584/0x870 net/socket.c:2436
 ___sys_sendmsg+0x214/0x294 net/socket.c:2490
 __sys_sendmsg net/socket.c:2519 [inline]
 __do_sys_sendmsg net/socket.c:2528 [inline]
 __se_sys_sendmsg net/socket.c:2526 [inline]
 __arm64_sys_sendmsg+0x1ac/0x25c net/socket.c:2526
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffff800014d41b60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311
3 locks held by kworker/u4:3/293:
 #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff80001fcb7c00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
3 locks held by kworker/u4:5/435:
 #0: ffff0000c002a138 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff800020357c00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
4 locks held by kworker/u4:8/1797:
 #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff800024d67c00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff800016caa8d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x13c/0xa9c net/core/net_namespace.c:572
 #3: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
1 lock held by klogd/3634:
 #0: ffff0001b4186918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:475 [inline]
 #0: ffff0001b4186918 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1326 [inline]
 #0: ffff0001b4186918 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1621 [inline]
 #0: ffff0001b4186918 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x328/0x1e48 kernel/sched/core.c:6289
2 locks held by dhcpcd/3696:
 #0: ffff800016c9e508 (vlan_ioctl_mutex){+.+.}-{3:3}, at: sock_ioctl+0x598/0x8b0 net/socket.c:1219
 #1: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
2 locks held by getty/3785:
 #0: ffff0000d4035098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001d6ce2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158
3 locks held by kworker/1:3/4116:
 #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff800020167c00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
3 locks held by kworker/0:5/4130:
 #0: ffff0000d2df5938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff800020497c00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
3 locks held by kworker/1:4/4156:
 #0: ffff0000d2df5938 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff800020607c00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
3 locks held by kworker/u4:7/6795:
1 lock held by syz-executor/6935:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
2 locks held by syz-executor/7216:
 #0: ffff800016caa8d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d8/0x5e0 net/core/net_namespace.c:482
 #1: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
2 locks held by syz-executor/7223:
 #0: ffff800016caa8d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d8/0x5e0 net/core/net_namespace.c:482
 #1: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
2 locks held by syz-executor/7228:
 #0: ffff800016caa8d0 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2d8/0x5e0 net/core/net_namespace.c:482
 #1: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
1 lock held by syz.8.2717/7256:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7258:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7264:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7269:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7276:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7279:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7285:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7291:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7296:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7303:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7305:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644
1 lock held by syz-executor/7312:
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016cb61a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0xa34/0xdb4 net/core/rtnetlink.c:5644

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


Crashes (308):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/28 08:56 linux-5.15.y 0c935c049b5c 6c09fb82 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2025/02/06 16:25 linux-5.15.y c16c81c81336 577d049b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2025/02/04 12:25 linux-5.15.y c16c81c81336 8f267cef .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2025/02/01 13:42 linux-5.15.y 003148680b79 aa47157c .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2025/02/01 05:45 linux-5.15.y 003148680b79 aa47157c .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2025/01/23 14:54 linux-5.15.y 4735586da88e a44b0418 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/12/08 11:35 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/12/08 06:21 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/12/02 08:50 linux-5.15.y 0a51d2d4527b 68914665 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/12/01 13:53 linux-5.15.y 0a51d2d4527b 68914665 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/12/01 02:12 linux-5.15.y 0a51d2d4527b 68914665 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/11/30 12:51 linux-5.15.y 0a51d2d4527b 68914665 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/11/28 17:23 linux-5.15.y 0a51d2d4527b 5df23865 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/11/22 05:56 linux-5.15.y 0a51d2d4527b 4b25d554 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/11/11 09:22 linux-5.15.y 3c17fc483905 6b856513 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/11/11 02:19 linux-5.15.y 3c17fc483905 6b856513 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/11/10 13:32 linux-5.15.y 3c17fc483905 6b856513 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/10/21 11:18 linux-5.15.y 584a40a22cb9 cd6fc0a3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/10/20 12:59 linux-5.15.y 584a40a22cb9 cd6fc0a3 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/10/02 09:44 linux-5.15.y 3a5928702e71 ea2b66a6 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/09/09 08:58 linux-5.15.y 14e468424d3e 9750182a .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/09/04 03:14 linux-5.15.y fa93fa65db6e 326f9c5a .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/13 12:38 linux-5.15.y c61bd26ae81a 2aa5052f .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/12 20:34 linux-5.15.y c61bd26ae81a f815599d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/08 15:54 linux-5.15.y c61bd26ae81a 82c05ab8 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/07 01:03 linux-5.15.y c61bd26ae81a 121701b6 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/05/26 03:12 linux-5.15.y c61bd26ae81a a10a183e .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/05/21 20:38 linux-5.15.y 83655231580b 4c0d3ee3 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2025/04/01 12:03 linux-5.15.y 0c935c049b5c 36d76a97 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/10/04 14:50 linux-5.15.y 3a5928702e71 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/09/27 14:31 linux-5.15.y 3a5928702e71 9314348a .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/07/04 14:32 linux-5.15.y 4878aadf2d15 3f2748a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/07/04 07:01 linux-5.15.y 4878aadf2d15 3f2748a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/07/04 06:58 linux-5.15.y 4878aadf2d15 3f2748a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/07/03 21:48 linux-5.15.y 4878aadf2d15 f76a75f3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/07/03 10:47 linux-5.15.y 4878aadf2d15 1ecfa2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/07/02 14:13 linux-5.15.y 4878aadf2d15 07f0a0a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/07/02 07:02 linux-5.15.y 4878aadf2d15 b294e901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/07/01 14:17 linux-5.15.y 4878aadf2d15 b294e901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/30 06:44 linux-5.15.y 4878aadf2d15 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/29 00:02 linux-5.15.y 4878aadf2d15 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/28 22:36 linux-5.15.y 4878aadf2d15 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/28 16:14 linux-5.15.y 4878aadf2d15 757f06b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/28 10:16 linux-5.15.y 4878aadf2d15 6ef39602 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/27 11:02 linux-5.15.y 4878aadf2d15 6ef39602 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/27 11:00 linux-5.15.y 4878aadf2d15 6ef39602 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/27 01:40 linux-5.15.y 4878aadf2d15 c6d33a01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/26 12:42 linux-5.15.y 4878aadf2d15 c6d33a01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/26 00:16 linux-5.15.y 4878aadf2d15 dec8bc94 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/25 13:00 linux-5.15.y 4878aadf2d15 04bd2a30 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/25 04:53 linux-5.15.y 4878aadf2d15 215eef4a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/25 03:47 linux-5.15.y 4878aadf2d15 215eef4a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/25 02:22 linux-5.15.y 4878aadf2d15 215eef4a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/24 23:44 linux-5.15.y 4878aadf2d15 215eef4a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/24 17:42 linux-5.15.y 4878aadf2d15 edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/24 14:51 linux-5.15.y 4878aadf2d15 edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/23 07:23 linux-5.15.y 4878aadf2d15 edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/23 05:45 linux-5.15.y 4878aadf2d15 edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/22 00:47 linux-5.15.y 4878aadf2d15 edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/21 19:04 linux-5.15.y 4878aadf2d15 edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/21 10:42 linux-5.15.y 4878aadf2d15 dac2aa43 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/21 04:37 linux-5.15.y 4878aadf2d15 dac2aa43 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/20 18:22 linux-5.15.y 4878aadf2d15 dac2aa43 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/20 12:01 linux-5.15.y 4878aadf2d15 dac2aa43 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/20 11:55 linux-5.15.y 4878aadf2d15 dac2aa43 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/20 04:26 linux-5.15.y 4878aadf2d15 41b7e219 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/19 10:29 linux-5.15.y 4878aadf2d15 41b7e219 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/19 03:37 linux-5.15.y 4878aadf2d15 41b7e219 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/19 01:15 linux-5.15.y 4878aadf2d15 639d6cdf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/06/18 15:59 linux-5.15.y 4878aadf2d15 639d6cdf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
2024/05/20 16:40 linux-5.15.y 83655231580b c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 INFO: task hung in rtnl_lock
* Struck through repros no longer work on HEAD.