syzbot


INFO: task hung in wpan_phy_register (3)

Status: auto-obsoleted due to no activity on 2023/10/07 23:19
Subsystems: wpan
[Documentation on labels]
First crash: 235d, last: 235d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in wpan_phy_register wpan 3 821d 863d 0/26 auto-closed as invalid on 2022/02/28 22:03
upstream INFO: task hung in wpan_phy_register (2) wpan 1 491d 491d 0/26 auto-obsoleted due to no activity on 2023/02/13 20:54

Sample crash report:
INFO: task kworker/0:0:7 blocked for more than 143 seconds.
      Not tainted 6.4.0-syzkaller-11811-gfe1de5516796 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0     state:D stack:22056 pid:7     ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xaa9/0x2f00 kernel/sched/core.c:6710
 schedule+0xde/0x1a0 kernel/sched/core.c:6786
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 wpan_phy_register+0x27/0x150 net/ieee802154/core.c:145
 ieee802154_register_hw+0x6d3/0xa20 net/mac802154/main.c:239
 atusb_probe+0xfdc/0x24c0 drivers/net/ieee802154/atusb.c:1004
 usb_probe_interface+0x30f/0x960 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x240/0xca0 drivers/base/dd.c:658
 __driver_probe_device+0x1df/0x4b0 drivers/base/dd.c:798
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:828
 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:956
 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1028
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x112d/0x1a40 drivers/base/core.c:3625
 usb_set_configuration+0x1196/0x1bc0 drivers/usb/core/message.c:2211
 usb_generic_driver_probe+0xcf/0x130 drivers/usb/core/generic.c:238
 usb_probe_device+0xd8/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x240/0xca0 drivers/base/dd.c:658
 __driver_probe_device+0x1df/0x4b0 drivers/base/dd.c:798
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:828
 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:956
 bus_for_each_drv+0x149/0x1d0 drivers/base/bus.c:457
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1028
 bus_probe_device+0x17c/0x1c0 drivers/base/bus.c:532
 device_add+0x112d/0x1a40 drivers/base/core.c:3625
 usb_new_device+0xcb2/0x19d0 drivers/usb/core/hub.c:2590
 hub_port_connect drivers/usb/core/hub.c:5422 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5566 [inline]
 port_event drivers/usb/core/hub.c:5726 [inline]
 hub_event+0x2e3d/0x4ed0 drivers/usb/core/hub.c:5808
 process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task kworker/0:3:5276 blocked for more than 143 seconds.
      Not tainted 6.4.0-syzkaller-11811-gfe1de5516796 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3     state:D stack:22312 pid:5276  ppid:2      flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0xaa9/0x2f00 kernel/sched/core.c:6710
 schedule+0xde/0x1a0 kernel/sched/core.c:6786
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
 unregister_netdev+0x12/0x30 net/core/dev.c:10923
 r871xu_dev_remove+0x28f/0x480 drivers/staging/rtl8712/usb_intf.c:597
 usb_unbind_interface+0x1dc/0x8e0 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:569 [inline]
 device_remove+0x11f/0x170 drivers/base/dd.c:561
 __device_release_driver drivers/base/dd.c:1270 [inline]
 device_release_driver_internal+0x443/0x610 drivers/base/dd.c:1293
 bus_remove_device+0x22c/0x420 drivers/base/bus.c:574
 device_del+0x399/0xa30 drivers/base/core.c:3814
 usb_disable_device+0x360/0x7b0 drivers/usb/core/message.c:1420
 usb_disconnect+0x2db/0x8a0 drivers/usb/core/hub.c:2253
 hub_port_connect drivers/usb/core/hub.c:5261 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5566 [inline]
 port_event drivers/usb/core/hub.c:5726 [inline]
 hub_event+0x2073/0x4ed0 drivers/usb/core/hub.c:5808
 process_one_work+0xa34/0x16f0 kernel/workqueue.c:2597
 worker_thread+0x67d/0x10c0 kernel/workqueue.c:2748
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Showing all locks held in the system:
6 locks held by kworker/0:0/7:
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc9000007fdb0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffff888105beb190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #2: ffff888105beb190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4ed0 drivers/usb/core/hub.c:5754
 #3: ffff888119e74190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #3: ffff888119e74190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x4b0 drivers/base/dd.c:1003
 #4: ffff88811eb8a160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #4: ffff88811eb8a160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x4b0 drivers/base/dd.c:1003
 #5: ffffffff88d898a8 (rtnl_mutex){+.+.}-{3:3}, at: wpan_phy_register+0x27/0x150 net/ieee802154/core.c:145
3 locks held by kworker/0:1/9:
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc9000009fdb0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffffffff88d898a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff87ca6070 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff87ca5d70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
 #0: ffffffff87ca6c80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6615
6 locks held by kworker/0:2/2335:
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc90006c7fdb0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffff888105b9b190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #2: ffff888105b9b190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4ed0 drivers/usb/core/hub.c:5754
 #3: ffff888105b9e500 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3162 [inline]
 #3: ffff888105b9e500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5318 [inline]
 #3: ffff888105b9e500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5566 [inline]
 #3: ffff888105b9e500 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5726 [inline]
 #3: ffff888105b9e500 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2847/0x4ed0 drivers/usb/core/hub.c:5808
 #4: ffff888102316a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5319 [inline]
 #4: ffff888102316a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5566 [inline]
 #4: ffff888102316a68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5726 [inline]
 #4: ffff888102316a68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x287c/0x4ed0 drivers/usb/core/hub.c:5808
 #5: ffffffff886c80d0 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}, at: hub_port_reset+0x189/0x1de0 drivers/usb/core/hub.c:2977
2 locks held by dhcpcd/2409:
 #0: ffffffff88d898a8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x1c4/0x1df0 net/ipv4/devinet.c:1074
 #1: ffff888119facdb0 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x32/0x830 drivers/staging/rtl8712/os_intfs.c:391
2 locks held by getty/2429:
 #0: ffff888102243098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900000452f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xf08/0x13f0 drivers/tty/n_tty.c:2187
6 locks held by kworker/1:3/5261:
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc90001ae7db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffff888105fc3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #2: ffff888105fc3190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4ed0 drivers/usb/core/hub.c:5754
 #3: ffff888144f3a190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #3: ffff888144f3a190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x4b0 drivers/base/dd.c:1003
 #4: ffff8881338af160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #4: ffff8881338af160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x4b0 drivers/base/dd.c:1003
 #5: ffffffff88d898a8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x15/0x50 net/core/dev.c:10177
6 locks held by kworker/0:3/5276:
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc900019e7db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffff888105fa3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #2: ffff888105fa3190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4ed0 drivers/usb/core/hub.c:5754
 #3: ffff888101be8190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #3: ffff888101be8190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xff/0x8a0 drivers/usb/core/hub.c:2244
 #4: ffff88810ee67160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #4: ffff88810ee67160 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1093 [inline]
 #4: ffff88810ee67160 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa4/0x610 drivers/base/dd.c:1290
 #5: ffffffff88d898a8 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0x12/0x30 net/core/dev.c:10923
6 locks held by kworker/0:4/5288:
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff88810be79938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc90001a47db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffff888105b5b190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #2: ffff888105b5b190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c0/0x4ed0 drivers/usb/core/hub.c:5754
 #3: ffff888142867190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #3: ffff888142867190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x4b0 drivers/base/dd.c:1003
 #4: ffff88810b655160 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:958 [inline]
 #4: ffff88810b655160 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x4b0 drivers/base/dd.c:1003
 #5: ffffffff88d898a8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x15/0x50 net/core/dev.c:10177
3 locks held by kworker/1:5/5360:
3 locks held by kworker/1:6/5364:
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:20 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic64_set include/linux/atomic/atomic-arch-fallback.h:2608 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: raw_atomic_long_set include/linux/atomic/atomic-long.h:79 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:3196 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:675 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:702 [inline]
 #0: ffff88810b70cd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x8fd/0x16f0 kernel/workqueue.c:2567
 #1: ffffc90001b67db0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x930/0x16f0 kernel/workqueue.c:2571
 #2: ffffffff88d898a8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630
4 locks held by udevd/6570:
 #0: ffff888113bab418 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xe3/0x12d0 fs/seq_file.c:182
 #1: ffff888117df6488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x450 fs/kernfs/file.c:154
 #2: ffff8881067b9748 (kn->active#33){.+.+}-{0:0}, at: kernfs_seq_start+0x75/0x450 fs/kernfs/file.c:155
 #3: ffff888142867190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:963 [inline]
 #3: ffff888142867190 (&dev->mutex){....}-{3:3}, at: serial_show+0x26/0xa0 drivers/usb/core/sysfs.c:143
4 locks held by udevd/6890:
 #0: ffff88811dac4e80 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xe3/0x12d0 fs/seq_file.c:182
 #1: ffff888112ac2888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4b/0x450 fs/kernfs/file.c:154
 #2: ffff888113255da0 (kn->active#30){++++}-{0:0}, at: kernfs_seq_start+0x75/0x450 fs/kernfs/file.c:155
 #3: ffff888144f3a190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:963 [inline]
 #3: ffff888144f3a190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-syzkaller-11811-gfe1de5516796 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x273/0x2d0 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+0xe16/0x1090 kernel/hung_task.c:379
 kthread+0x344/0x440 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:86 [inline]
NMI backtrace for cpu 0 skipped: idling at __intel_idle_hlt drivers/idle/intel_idle.c:205 [inline]
NMI backtrace for cpu 0 skipped: idling at intel_idle_hlt+0x23/0x30 drivers/idle/intel_idle.c:224

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/07/09 23:15 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing fe1de5516796 668cb1fa .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-usb INFO: task hung in wpan_phy_register
* Struck through repros no longer work on HEAD.