INFO: task udevd:4037 blocked for more than 143 seconds.
      Not tainted 5.15.181-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd           state:D stack:    0 pid: 4037 ppid:  3643 flags:0x00000004
Call trace:
 __switch_to+0x2f4/0x558 arch/arm64/kernel/process.c:521
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0xe00/0x1c0c kernel/sched/core.c:6376
 schedule+0x11c/0x1c8 kernel/sched/core.c:6459
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6518
 __mutex_lock_common+0xa9c/0x1edc kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743
 device_lock include/linux/device.h:760 [inline]
 uevent_show+0x170/0x334 drivers/base/core.c:2408
 dev_attr_show+0x60/0xcc drivers/base/core.c:2110
 sysfs_kf_seq_show+0x2ac/0x440 fs/sysfs/file.c:61
 kernfs_seq_show+0x118/0x154 fs/kernfs/file.c:168
 seq_read_iter+0x3ac/0xc00 fs/seq_file.c:230
 kernfs_fop_read_iter+0x140/0x500 fs/kernfs/file.c:241
 call_read_iter include/linux/fs.h:2166 [inline]
 new_sync_read fs/read_write.c:404 [inline]
 vfs_read+0x7c4/0xa10 fs/read_write.c:485
 ksys_read+0x120/0x210 fs/read_write.c:623
 __do_sys_read fs/read_write.c:633 [inline]
 __se_sys_read fs/read_write.c:631 [inline]
 __arm64_sys_read+0x7c/0x90 fs/read_write.c:631
 __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+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/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:
6 locks held by kworker/0:0/7:
 #0: ffff0000c2c8d138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283
 #1: ffff80001b297c00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285
 #2: ffff0000cf3c8220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #2: ffff0000cf3c8220 (&dev->mutex){....}-{3:3}, at: hub_event+0x140/0x4188 drivers/usb/core/hub.c:5781
 #3: ffff0000d5e31220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #3: ffff0000d5e31220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8c/0x3d4 drivers/base/dd.c:954
 #4: ffff0000dd1621a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #4: ffff0000dd1621a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8c/0x3d4 drivers/base/dd.c:954
 #5: ffff8000141d2790 (umhelper_sem){++++}-{3:3}, at: usermodehelper_read_trylock+0xe0/0x2d8 kernel/umh.c:217
1 lock held by khungtaskd/27:
 #0: ffff8000143211e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311
5 locks held by kworker/u4:3/153:
 #0: ffff0000c038c138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283
 #1: ffff80001beb7c00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285
 #2: ffff80001626c690 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x12c/0xa98 net/core/net_namespace.c:589
 #3: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
 #4: ffff800014325bb0 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x54/0x49c kernel/rcu/tree.c:4039
1 lock held by dhcpcd/3694:
 #0: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: __netlink_dump_start+0x108/0x6f0 net/netlink/af_netlink.c:2334
2 locks held by getty/3783:
 #0: ffff0000d0eb7098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001b7902e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2f0/0xf6c drivers/tty/n_tty.c:2158
4 locks held by udevd/4037:
 #0: ffff0000c9571540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xa8/0xc00 fs/seq_file.c:182
 #1: ffff0000d6817088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x58/0x390 fs/kernfs/file.c:112
 #2: ffff0000d14a6748 (kn->active#2){++++}-{0:0}, at: kernfs_seq_start+0x74/0x390 fs/kernfs/file.c:113
 #3: ffff0000d5e31220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline]
 #3: ffff0000d5e31220 (&dev->mutex){....}-{3:3}, at: uevent_show+0x170/0x334 drivers/base/core.c:2408
3 locks held by kworker/1:5/4071:
 #0: ffff0000d2eb7538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283
 #1: ffff80001f427c00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285
 #2: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
3 locks held by kworker/u4:7/4202:
 #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283
 #1: ffff80001f6d7c00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285
 #2: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
3 locks held by kworker/0:8/4439:
 #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283
 #1: ffff80001bf47c00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285
 #2: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
3 locks held by kworker/0:10/4441:
 #0: ffff0000d2eb7538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283
 #1: ffff80001f777c00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285
 #2: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
3 locks held by kworker/u4:13/5865:
 #0: ffff0000c5e63138 ((wq_completion)cfg80211){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283
 #1: ffff800020ea7c00 ((work_completion)(&(&rdev->dfs_update_channels_wk)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285
 #2: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
1 lock held by syz-executor/8339:
 #0: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x98c/0xd04 net/core/rtnetlink.c:5647
1 lock held by syz.3.752/8519:
 #0: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x98c/0xd04 net/core/rtnetlink.c:5647
3 locks held by syz.8.759/8574:
 #0: ffff8000162d3270 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:802
 #1: ffff8000162d30c8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: ffff8000162d30c8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x110/0xb6c net/netlink/genetlink.c:790
 #2: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:72
2 locks held by syz.6.762/8586:
 #0: ffff8000162d3270 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:802
 #1: ffff8000162d30c8 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: ffff8000162d30c8 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x110/0xb6c net/netlink/genetlink.c:790
1 lock held by syz.5.764/8610:
 #0: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffff800016277f68 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x98c/0xd04 net/core/rtnetlink.c:5647

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