INFO: task kworker/0:1:14 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:27232 pid: 14 ppid: 2 flags:0x00004000 Workqueue: events switchdev_deferred_process_work Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 switchdev_deferred_process_work+0x5/0x10 net/switchdev/switchdev.c:74 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/1:1:34 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:25520 pid: 34 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 addrconf_dad_work+0x9f/0x10c0 net/ipv6/addrconf.c:4029 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/0:2:2911 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:26568 pid: 2911 ppid: 2 flags:0x00004000 Workqueue: events linkwatch_event Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 linkwatch_event+0x5/0x50 net/core/link_watch.c:250 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task kworker/0:3:3140 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:26504 pid: 3140 ppid: 2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 addrconf_dad_work+0x9f/0x10c0 net/ipv6/addrconf.c:4029 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 INFO: task dhcpcd:4982 blocked for more than 144 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:dhcpcd state:D stack:26352 pid: 4982 ppid: 1 flags:0x00000000 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 vlan_ioctl_handler+0xa0/0xb50 net/8021q/vlan.c:557 sock_ioctl+0x25e/0x570 net/socket.c:1146 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:739 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f66278260e7 RSP: 002b:00007ffe1e8b9f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000055835b0d99b0 RCX: 00007f66278260e7 RDX: 00007ffe1e8b9f50 RSI: 0000000000008982 RDI: 0000000000000011 RBP: 0000000000000002 R08: 0000000000000008 R09: 0000000000000000 R10: 00007ffe1e8ca5c0 R11: 0000000000000246 R12: 00007ffe1e8b9f50 R13: 00007ffe1e8b9fd0 R14: 000055835b0d99b0 R15: 000055835b0d7bd8 INFO: task syz-executor407:13521 blocked for more than 144 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor407 state:D stack:25008 pid:13521 ppid: 13495 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x8de/0x2170 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 rtnl_lock net/core/rtnetlink.c:72 [inline] rtnetlink_rcv_msg+0x2e4/0x860 net/core/rtnetlink.c:5550 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2494 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:672 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2345 ___sys_sendmsg+0xd3/0x150 net/socket.c:2399 __sys_sendmsg+0xb2/0x140 net/socket.c:2432 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fbe94d28419 RSP: 002b:00007ffd1ad1cda8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000004b561 RCX: 00007fbe94d28419 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000007 RBP: 0000000000000000 R08: 00007ffd1ad1cf48 R09: 00007ffd1ad1cf48 R10: 00007ffd1ad1cf48 R11: 0000000000000246 R12: 00007ffd1ad1cdbc R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1599 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x9a/0xcc lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 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+0x951/0xc20 kernel/hung_task.c:294 kthread+0x36f/0x450 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: 118 Comm: kworker/u4:3 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: netns cleanup_net RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline] RIP: 0010:__local_bh_disable_ip+0x31/0xb0 kernel/softirq.c:139 Code: a9 00 00 0f 00 55 53 89 f3 0f 85 82 00 00 00 9c 5d fa 65 01 1d 90 1f c4 7e 65 8b 05 89 1f c4 7e 48 31 d8 f6 c4 ff 74 15 55 9d <65> 8b 05 78 1f c4 7e 25 ff ff ff 7f 39 d8 74 0a 5b 5d c3 e8 07 69 RSP: 0018:ffffc90000fcf7c0 EFLAGS: 00000246 RAX: 0000000000000007 RBX: 0000000000000200 RCX: 1ffffffff18f5fa3 RDX: 0000000000000000 RSI: 0000000000000200 RDI: ffffffff86c98cfb RBP: 0000000000000246 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff150d090 R11: 0000000000000001 R12: 00000000000040e8 R13: ffffc90000fcf858 R14: 00000000000081cf R15: ffff888010dd2f00 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555c252c0 CR3: 000000001e408000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: local_bh_disable include/linux/bottom_half.h:19 [inline] get_next_corpse net/netfilter/nf_conntrack_core.c:2198 [inline] nf_ct_iterate_cleanup+0xff/0x2e0 net/netfilter/nf_conntrack_core.c:2244 nf_ct_iterate_cleanup_net net/netfilter/nf_conntrack_core.c:2329 [inline] nf_ct_iterate_cleanup_net+0xf9/0x150 net/netfilter/nf_conntrack_core.c:2314 masq_device_event+0x8d/0xc0 net/netfilter/nf_nat_masquerade.c:88 notifier_call_chain+0x94/0x170 kernel/notifier.c:83 call_netdevice_notifiers_extack net/core/dev.c:2052 [inline] call_netdevice_notifiers net/core/dev.c:2066 [inline] dev_close_many+0x298/0x580 net/core/dev.c:1641 rollback_registered_many+0x365/0x1290 net/core/dev.c:9472 unregister_netdevice_many.part.0+0x10/0x2b0 net/core/dev.c:10735 unregister_netdevice_many net/core/dev.c:10734 [inline] default_device_exit_batch+0x2a9/0x370 net/core/dev.c:11218 cleanup_net+0x423/0x990 net/core/net_namespace.c:604 process_one_work+0x84c/0x13b0 kernel/workqueue.c:2275 worker_thread+0x598/0xf80 kernel/workqueue.c:2421 kthread+0x36f/0x450 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296