INFO: task kworker/0:4:21321 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc5-syzkaller-00096-g3bf0514dc6f3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:4     state:D stack:22320 pid:21321 tgid:21321 ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0xca8/0x3100 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6802 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6817
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:752
 unregister_netdev+0x12/0x30 net/core/dev.c:11156
 r871xu_dev_remove+0x28e/0x480 drivers/staging/rtl8712/usb_intf.c:596
 usb_unbind_interface+0x1e5/0x960 drivers/usb/core/driver.c:461
 device_remove drivers/base/dd.c:569 [inline]
 device_remove+0x11f/0x170 drivers/base/dd.c:561
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x44a/0x610 drivers/base/dd.c:1295
 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574
 device_del+0x39a/0xa50 drivers/base/core.c:3828
 usb_disable_device+0x36c/0x7f0 drivers/usb/core/message.c:1416
 usb_disconnect+0x2e1/0x910 drivers/usb/core/hub.c:2296
 hub_port_connect drivers/usb/core/hub.c:5352 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5652 [inline]
 port_event drivers/usb/core/hub.c:5812 [inline]
 hub_event+0x1be0/0x4f40 drivers/usb/core/hub.c:5894
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2633
 process_scheduled_works kernel/workqueue.c:2706 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2787
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:0/8:
 #0: ffff888106296d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
 #1: ffffc9000008fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
 #2: ffff88810ab91190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #2: ffff88810ab91190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5840
3 locks held by kworker/0:1/9:
 #0: ffff88810ffb0538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
 #1: ffffc9000009fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
 #2: ffffffff88fd2de8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4671
1 lock held by khungtaskd/29:
 #0: ffffffff87eadb60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff87eadb60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff87eadb60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by dhcpcd/2431:
 #0: ffffffff88fd2de8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x1d3/0x1f10 net/ipv4/devinet.c:1091
 #1: ffff88811e744d90 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x32/0x820 drivers/staging/rtl8712/os_intfs.c:391
2 locks held by getty/2451:
 #0: ffff88810168d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
3 locks held by kworker/1:4/4844:
 #0: ffff88810ffb0538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
 #1: ffffc9000460fd80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
 #2: ffffffff88fd2de8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4671
3 locks held by kworker/1:6/4846:
 #0: ffff888100088938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
 #1: ffffc90004637d80 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
 #2: ffffffff88fd2de8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10391
6 locks held by kworker/0:2/10438:
 #0: ffff888106296d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
 #1: ffffc900045cfd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
 #2: ffff88810af21190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #2: ffff88810af21190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5840
 #3: ffff888107288190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #3: ffff888107288190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #4: ffff88811ab57160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #4: ffff88811ab57160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #5: ffffffff88fd2de8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10391
5 locks held by kworker/0:3/17737:
 #0: ffff888106296d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
 #1: ffffc90005fa7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
 #2: ffff88810afd3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #2: ffff88810afd3190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5840
 #3: ffff88813fa0f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #3: ffff88813fa0f190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x910 drivers/usb/core/hub.c:2287
 #4: ffff888141c8a160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #4: ffff888141c8a160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff888141c8a160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
6 locks held by kworker/0:4/21321:
 #0: ffff888106296d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
 #1: ffffc900030b7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
 #2: ffff88810afb1190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #2: ffff88810afb1190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5840
 #3: ffff8881046b2190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #3: ffff8881046b2190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x10a/0x910 drivers/usb/core/hub.c:2287
 #4: ffff88811e68b160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #4: ffff88811e68b160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #4: ffff88811e68b160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1292
 #5: ffffffff88fd2de8 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0x12/0x30 net/core/dev.c:11156
4 locks held by udevd/29702:
 #0: ffff888119f8f6b8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
 #1: ffff88811a18f088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x230 fs/kernfs/file.c:154
 #2: ffff88811f49f4e0 (kn->active#18){++++}-{0:0}, at: kernfs_seq_start+0x71/0x230 fs/kernfs/file.c:155
 #3: ffff88811e8db190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:995 [inline]
 #3: ffff88811e8db190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
4 locks held by udevd/31296:
 #0: ffff888112ed77f0 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xda/0x1280 fs/seq_file.c:182
 #1: ffff8881197c2888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x230 fs/kernfs/file.c:154
 #2: ffff888141c4b6d0 (kn->active#21){++++}-{0:0}, at: kernfs_seq_start+0x71/0x230 fs/kernfs/file.c:155
 #3: ffff888107288190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:995 [inline]
 #3: ffff888107288190 (&dev->mutex){....}-{3:3}, at: serial_show+0x26/0xa0 drivers/usb/core/sysfs.c:143
6 locks held by kworker/0:7/1281:
 #0: ffff888106296d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2608
 #1: ffffc90003e17d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2609
 #2: ffff88810afd1190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #2: ffff88810afd1190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x4f40 drivers/usb/core/hub.c:5840
 #3: ffff88811e8db190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #3: ffff88811e8db190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #4: ffff888112593160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline]
 #4: ffff888112593160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
 #5: ffffffff88fd2de8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10391

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller-00096-g3bf0514dc6f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 30278 Comm: syz-executor.3 Not tainted 6.8.0-rc5-syzkaller-00096-g3bf0514dc6f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:86 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0xf7/0x190 mm/kasan/generic.c:189
Code: 00 00 48 85 d2 74 1e 41 83 e2 07 49 39 d1 75 0a 45 3a 11 b8 01 00 00 00 7c 0b 44 89 c2 e8 51 ed ff ff 83 f0 01 5b 5d 41 5c c3 <48> 85 d2 74 4f 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 41 80 38 00
RSP: 0018:ffffc9000450f9d0 EFLAGS: 00000083
RAX: fffffbfff16ea562 RBX: fffffbfff16ea563 RCX: ffffffff812d8c9e
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff8b752b10
RBP: fffffbfff16ea562 R08: 0000000000000000 R09: fffffbfff16ea562
R10: ffffffff8b752b17 R11: 0000000000000000 R12: ffff888113d5ba00
R13: 0000000000000080 R14: 0000000000000007 R15: 1ffff920008a1f46
FS:  0000555555962480(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc696156c8 CR3: 000000013745d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228
 mark_lock+0xb5/0xc50 kernel/locking/lockdep.c:4656
 mark_usage kernel/locking/lockdep.c:4591 [inline]
 __lock_acquire+0x991/0x3b30 kernel/locking/lockdep.c:5091
 lock_acquire kernel/locking/lockdep.c:5754 [inline]
 lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
 __might_fault mm/memory.c:6060 [inline]
 __might_fault+0x11f/0x1a0 mm/memory.c:6053
 _copy_from_user+0x2b/0xf0 lib/usercopy.c:14
 copy_from_user include/linux/uaccess.h:183 [inline]
 get_timespec64+0x8c/0x240 kernel/time/time.c:877
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1385 [inline]
 __se_sys_clock_nanosleep kernel/time/posix-timers.c:1373 [inline]
 __x64_sys_clock_nanosleep+0x1ce/0x490 kernel/time/posix-timers.c:1373
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f345d4fa173
Code: 00 00 00 00 0f 1f 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 8e 6d 0d 00 00 74 14 b8 e6 00 00 00 0f 05 <f7> d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10
RSP: 002b:00007ffe1c4cd9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 000000000000023b RCX: 00007f345d4fa173
RDX: 00007ffe1c4cd9c0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe1c4cda4c R08: 0000000000000b21 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000032
R13: 00000000002b7575 R14: 00000000002b7575 R15: 0000000000000000
 </TASK>