syzbot


INFO: task hung in ieee80211_register_hw (2)

Status: closed as invalid on 2022/02/08 09:40
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 363d, last: 305d
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in ieee80211_register_hw 1 73d 73d 0/1 upstream: reported on 2022/09/20 17:32
upstream INFO: task hung in ieee80211_register_hw (3) 1 272d 272d 0/24 auto-closed as invalid on 2022/06/03 18:58
upstream INFO: task hung in ieee80211_register_hw 1 990d 990d 0/24 auto-closed as invalid on 2020/06/15 23:33

Sample crash report:
INFO: task kworker/1:4:4113 blocked for more than 143 seconds.
      Not tainted 5.17.0-rc2-syzkaller-00029-g60c250a98d4c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:4     state:D stack:22912 pid: 4113 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x931/0x22e0 kernel/sched/core.c:6295
 schedule+0xd2/0x260 kernel/sched/core.c:6368
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 ieee80211_register_hw+0x1b50/0x3ec0 net/mac80211/main.c:1242
 probe+0x47b/0x590 drivers/net/wireless/zydas/zd1211rw/zd_usb.c:1393
 usb_probe_interface+0x315/0x7f0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:752
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:782
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:899
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:970
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xc17/0x1ee0 drivers/base/core.c:3405
 usb_set_configuration+0x101e/0x1900 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0xba/0x100 drivers/usb/core/generic.c:238
 usb_probe_device+0xd9/0x2c0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:517 [inline]
 really_probe+0x245/0xcc0 drivers/base/dd.c:596
 __driver_probe_device+0x338/0x4d0 drivers/base/dd.c:752
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:782
 __device_attach_driver+0x20b/0x2f0 drivers/base/dd.c:899
 bus_for_each_drv+0x15f/0x1e0 drivers/base/bus.c:427
 __device_attach+0x228/0x4a0 drivers/base/dd.c:970
 bus_probe_device+0x1e4/0x290 drivers/base/bus.c:487
 device_add+0xc17/0x1ee0 drivers/base/core.c:3405
 usb_new_device.cold+0x63f/0x108e drivers/usb/core/hub.c:2566
 hub_port_connect drivers/usb/core/hub.c:5362 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5506 [inline]
 port_event drivers/usb/core/hub.c:5664 [inline]
 hub_event+0x2585/0x44d0 drivers/usb/core/hub.c:5746
 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
 worker_thread+0x657/0x1110 kernel/workqueue.c:2454
 kthread+0x2ef/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: task kworker/1:5:4261 blocked for more than 143 seconds.
      Not tainted 5.17.0-rc2-syzkaller-00029-g60c250a98d4c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:5     state:D stack:25424 pid: 4261 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4986 [inline]
 __schedule+0x931/0x22e0 kernel/sched/core.c:6295
 schedule+0xd2/0x260 kernel/sched/core.c:6368
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6427
 __mutex_lock_common kernel/locking/mutex.c:673 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
 unregister_netdev+0xe/0x20 net/core/dev.c:10473
 r871xu_dev_remove+0x24f/0x2c0 drivers/staging/rtl8712/usb_intf.c:599
 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458
 __device_release_driver+0x5d7/0x700 drivers/base/dd.c:1206
 device_release_driver_internal drivers/base/dd.c:1237 [inline]
 device_release_driver+0x26/0x40 drivers/base/dd.c:1260
 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529
 device_del+0x502/0xd50 drivers/base/core.c:3592
 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419
 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2228
 hub_port_connect drivers/usb/core/hub.c:5206 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5506 [inline]
 port_event drivers/usb/core/hub.c:5664 [inline]
 hub_event+0x1e39/0x44d0 drivers/usb/core/hub.c:5746
 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
 worker_thread+0x657/0x1110 kernel/workqueue.c:2454
 kthread+0x2ef/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/25:
 #0: ffffffff87891440 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
6 locks held by kworker/0:2/69:
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
 #1: ffffc90000e6fdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
 #2: ffff88810bf8d220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff88810bf8d220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5692
 #3: ffff88810be71220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff88810be71220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945
 #4: ffff8881126a51a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff8881126a51a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945
 #5: ffffffff88882268 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x11/0x50 net/core/dev.c:9789
6 locks held by kworker/1:2/706:
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
 #1: ffffc90001cd7db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
 #2: ffff88810ceaf220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff88810ceaf220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5692
 #3: ffff888116749220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff888116749220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945
 #4: ffff888113f371a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff888113f371a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945
 #5: ffffffff88882268 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x11/0x50 net/core/dev.c:9789
2 locks held by dhcpcd/1206:
 #0: ffffffff88882268 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x1b3/0x1ca0 net/ipv4/devinet.c:1068
 #1: ffff8881161a4e20 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x2e/0x690 drivers/staging/rtl8712/os_intfs.c:375
2 locks held by getty/1228:
 #0: ffff88810e4ad098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
 #1: ffffc900000432e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
3 locks held by kworker/0:3/4058:
 #0: ffff88810e0eb138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88810e0eb138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88810e0eb138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff88810e0eb138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
 #0: ffff88810e0eb138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
 #0: ffff88810e0eb138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
 #1: ffffc900016f7db8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
 #2: ffffffff88882268 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4608
3 locks held by udevd/4059:
 #0: ffff88810d4f2888 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:203 [inline]
 #0: ffff88810d4f2888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x185/0x5f0 fs/kernfs/file.c:242
 #1: ffff88810c52f918 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:204 [inline]
 #1: ffff88810c52f918 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a8/0x5f0 fs/kernfs/file.c:242
 #2: ffff888116749220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:772 [inline]
 #2: ffff888116749220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
3 locks held by udevd/4060:
 #0: ffff88810c495c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:203 [inline]
 #0: ffff88810c495c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x185/0x5f0 fs/kernfs/file.c:242
 #1: ffff88811d872008 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:204 [inline]
 #1: ffff88811d872008 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a8/0x5f0 fs/kernfs/file.c:242
 #2: ffff8881126a7220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:772 [inline]
 #2: ffff8881126a7220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
3 locks held by kworker/1:3/4087:
 #0: ffff888100065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888100065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888100065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888100065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
 #0: ffff888100065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
 #0: ffff888100065d38 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
 #1: ffffc90001c67db8 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
 #2: ffffffff88882268 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x83/0xe20 net/wireless/reg.c:2451
6 locks held by kworker/1:4/4113:
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
 #1: ffffc90001d6fdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
 #2: ffff88810cfc7220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff88810cfc7220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5692
 #3: ffff8881126a7220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff8881126a7220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945
 #4: ffff88810a8901a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff88810a8901a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945
 #5: ffffffff88882268 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_register_hw+0x1b50/0x3ec0 net/mac80211/main.c:1242
6 locks held by kworker/0:5/4125:
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
 #1: ffffc90001dcfdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
 #2: ffff88810d037220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff88810d037220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5692
 #3: ffff88811339b220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff88811339b220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945
 #4: ffff88811a3891a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff88811a3891a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:945
 #5: ffffffff88882268 (rtnl_mutex){+.+.}-{3:3}, at: ieee80211_register_hw+0x1b50/0x3ec0 net/mac80211/main.c:1242
6 locks held by kworker/1:5/4261:
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
 #0: ffff888103bf0538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
 #1: ffffc90002387db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282
 #2: ffff88810ce97220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #2: ffff88810ce97220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5692
 #3: ffff88810ac9f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #3: ffff88810ac9f220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2219
 #4: ffff888102de91a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline]
 #4: ffff888102de91a8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1033 [inline]
 #4: ffff888102de91a8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1234 [inline]
 #4: ffff888102de91a8 (&dev->mutex){....}-{3:3}, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1260
 #5: ffffffff88882268 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0xe/0x20 net/core/dev.c:10473
3 locks held by udevd/5134:
 #0: ffff88810d809888 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:203 [inline]
 #0: ffff88810d809888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x185/0x5f0 fs/kernfs/file.c:242
 #1: ffff8881061ad918 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:204 [inline]
 #1: ffff8881061ad918 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a8/0x5f0 fs/kernfs/file.c:242
 #2: ffff88810be71220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:772 [inline]
 #2: ffff88810be71220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
3 locks held by udevd/5276:
 #0: ffff88810fa1c888 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:203 [inline]
 #0: ffff88810fa1c888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x185/0x5f0 fs/kernfs/file.c:242
 #1: ffff888118154748 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:204 [inline]
 #1: ffff888118154748 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1a8/0x5f0 fs/kernfs/file.c:242
 #2: ffff88811339b220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:772 [inline]
 #2: ffff88811339b220 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873
1 lock held by syz-executor.4/6561:
 #0: ffffffff8789a4e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
 #0: ffffffff8789a4e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fa/0x620 kernel/rcu/tree_exp.h:840

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

NMI backtrace for cpu 0
CPU: 0 PID: 25 Comm: khungtaskd Not tainted 5.17.0-rc2-syzkaller-00029-g60c250a98d4c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xc1d/0xf50 kernel/hung_task.c:369
 kthread+0x2ef/0x3a0 kernel/kthread.c:377
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:110 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:551

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-upstream-usb 2022/01/31 20:02 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 60c250a98d4c a491ad2d .config log report info INFO: task hung in ieee80211_register_hw
ci2-upstream-usb 2021/12/04 16:50 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing e1c72d907f4c a617004c .config log report info INFO: task hung in ieee80211_register_hw
* Struck through repros no longer work on HEAD.