ci starts bisection 2023-04-03 07:32:37.935326305 +0000 UTC m=+6708.258068824 bisecting fixing commit since ed4643521e6af8ab8ed1e467630a85884d2696cf building syzkaller on 89bc860804252dbacb8c2bea60b9204859f4afd7 ensuring issue is reproducible on original commit ed4643521e6af8ab8ed1e467630a85884d2696cf testing commit ed4643521e6af8ab8ed1e467630a85884d2696cf gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: b0d91dc46fd035ce8aff4989e7b0fad819804f8b52f09c051b2b0b831280b02f run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: EOF run #1: basic kernel testing failed: BUG: program execution failed: executor NUM: EOF run #2: basic kernel testing failed: BUG: program execution failed: executor NUM: EOF run #3: crashed: SYZFAIL: wrong response packet run #4: crashed: INFO: task hung in crda_timeout_work run #5: crashed: INFO: task hung in crda_timeout_work run #6: crashed: INFO: task hung in netdev_run_todo run #7: crashed: INFO: task hung in r871xu_dev_remove run #8: crashed: INFO: task hung in r871xu_dev_remove run #9: crashed: INFO: task hung in netdev_run_todo run #10: crashed: INFO: task hung in r871xu_dev_remove run #11: crashed: INFO: task hung in crda_timeout_work run #12: crashed: INFO: task hung in r871xu_dev_remove run #13: crashed: INFO: task hung in r871xu_dev_remove run #14: crashed: INFO: task hung in r871xu_dev_remove run #15: crashed: INFO: task hung in r871xu_dev_remove run #16: crashed: INFO: task hung in r871xu_dev_remove run #17: crashed: INFO: task hung in r871xu_dev_remove run #18: crashed: INFO: task hung in netdev_run_todo run #19: crashed: INFO: task hung in r871xu_dev_remove testing current HEAD 7e364e56293bb98cae1b55fd835f5991c4e96e7d testing commit 7e364e56293bb98cae1b55fd835f5991c4e96e7d gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 34902a18b40d413a21f412301a7de61db81b61b00f98941b40a4dbb1acf287dd run #0: crashed: INFO: task hung in crda_timeout_work run #1: crashed: INFO: task hung in r871xu_dev_remove run #2: crashed: INFO: task hung in r871xu_dev_remove run #3: crashed: INFO: task hung in r871xu_dev_remove run #4: crashed: INFO: task hung in r871xu_dev_remove run #5: crashed: INFO: task hung in r871xu_dev_remove run #6: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "/tmp/syz-executor601774095" "root@10.128.1.172:./syz-executor601774095"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.1.172 port 22 timed out lost connection run #7: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "/tmp/syz-executor2599174073" "root@10.128.1.183:./syz-executor2599174073"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.1.183 port 22 timed out lost connection run #8: basic kernel testing failed: failed to copy binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "/tmp/syz-executor3652223376" "root@10.128.1.184:./syz-executor3652223376"]: exit status 1 Connection timed out during banner exchange Connection to 10.128.1.184 port 22 timed out lost connection run #9: OK revisions tested: 2, total time: 35m59.539900603s (build: 15m12.826953666s, test: 19m46.021271854s) the crash still happens on HEAD commit msg: Linux 6.3-rc5 crash: INFO: task hung in r871xu_dev_remove INFO: task kworker/0:0:7 blocked for more than 143 seconds. Not tainted 6.3.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:24456 pid:7 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_timeout+0x22d/0x270 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106 r871xu_dev_remove+0x69/0x3f0 drivers/staging/rtl8712/usb_intf.c:595 usb_unbind_interface+0x187/0x7f0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1240 [inline] device_release_driver_internal+0x368/0x530 drivers/base/dd.c:1263 bus_remove_device+0x1ed/0x3f0 drivers/base/bus.c:574 device_del+0x431/0xaa0 drivers/base/core.c:3775 usb_disable_device+0x2a0/0x660 drivers/usb/core/message.c:1420 usb_disconnect+0x269/0x870 drivers/usb/core/hub.c:2238 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x17f7/0x4240 drivers/usb/core/hub.c:5793 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 process_scheduled_works kernel/workqueue.c:2453 [inline] worker_thread+0x73c/0xec0 kernel/workqueue.c:2539 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task kworker/1:0:22 blocked for more than 143 seconds. Not tainted 6.3.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:24464 pid:22 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_timeout+0x22d/0x270 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106 r871xu_dev_remove+0x69/0x3f0 drivers/staging/rtl8712/usb_intf.c:595 usb_unbind_interface+0x187/0x7f0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1240 [inline] device_release_driver_internal+0x368/0x530 drivers/base/dd.c:1263 bus_remove_device+0x1ed/0x3f0 drivers/base/bus.c:574 device_del+0x431/0xaa0 drivers/base/core.c:3775 usb_disable_device+0x2a0/0x660 drivers/usb/core/message.c:1420 usb_disconnect+0x269/0x870 drivers/usb/core/hub.c:2238 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x17f7/0x4240 drivers/usb/core/hub.c:5793 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 process_scheduled_works kernel/workqueue.c:2453 [inline] worker_thread+0x73c/0xec0 kernel/workqueue.c:2539 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task kworker/1:4:5049 blocked for more than 143 seconds. Not tainted 6.3.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:4 state:D stack:24912 pid:5049 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_timeout+0x22d/0x270 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106 r871xu_dev_remove+0x69/0x3f0 drivers/staging/rtl8712/usb_intf.c:595 usb_unbind_interface+0x187/0x7f0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1240 [inline] device_release_driver_internal+0x368/0x530 drivers/base/dd.c:1263 bus_remove_device+0x1ed/0x3f0 drivers/base/bus.c:574 device_del+0x431/0xaa0 drivers/base/core.c:3775 usb_disable_device+0x2a0/0x660 drivers/usb/core/message.c:1420 usb_disconnect+0x269/0x870 drivers/usb/core/hub.c:2238 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x17f7/0x4240 drivers/usb/core/hub.c:5793 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 process_scheduled_works kernel/workqueue.c:2453 [inline] worker_thread+0x73c/0xec0 kernel/workqueue.c:2539 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task kworker/0:4:5050 blocked for more than 144 seconds. Not tainted 6.3.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:27080 pid:5050 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 addrconf_verify_work+0xd/0x20 net/ipv6/addrconf.c:4629 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 worker_thread+0x59c/0xec0 kernel/workqueue.c:2537 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task kworker/1:6:5547 blocked for more than 144 seconds. Not tainted 6.3.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:6 state:D stack:25008 pid:5547 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 unregister_netdev+0xd/0x20 net/core/dev.c:10916 r871xu_dev_remove+0x226/0x3f0 drivers/staging/rtl8712/usb_intf.c:597 usb_unbind_interface+0x187/0x7f0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1240 [inline] device_release_driver_internal+0x368/0x530 drivers/base/dd.c:1263 bus_remove_device+0x1ed/0x3f0 drivers/base/bus.c:574 device_del+0x431/0xaa0 drivers/base/core.c:3775 usb_disable_device+0x2a0/0x660 drivers/usb/core/message.c:1420 usb_disconnect+0x269/0x870 drivers/usb/core/hub.c:2238 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x17f7/0x4240 drivers/usb/core/hub.c:5793 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 process_scheduled_works kernel/workqueue.c:2453 [inline] worker_thread+0x73c/0xec0 kernel/workqueue.c:2539 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task kworker/1:8:5603 blocked for more than 144 seconds. Not tainted 6.3.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:8 state:D stack:24664 pid:5603 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_timeout+0x22d/0x270 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106 r871xu_dev_remove+0x69/0x3f0 drivers/staging/rtl8712/usb_intf.c:595 usb_unbind_interface+0x187/0x7f0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1240 [inline] device_release_driver_internal+0x368/0x530 drivers/base/dd.c:1263 bus_remove_device+0x1ed/0x3f0 drivers/base/bus.c:574 device_del+0x431/0xaa0 drivers/base/core.c:3775 usb_disable_device+0x2a0/0x660 drivers/usb/core/message.c:1420 usb_disconnect+0x269/0x870 drivers/usb/core/hub.c:2238 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x17f7/0x4240 drivers/usb/core/hub.c:5793 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 process_scheduled_works kernel/workqueue.c:2453 [inline] worker_thread+0x73c/0xec0 kernel/workqueue.c:2539 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task kworker/0:8:5615 blocked for more than 144 seconds. Not tainted 6.3.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:8 state:D stack:24912 pid:5615 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_timeout+0x22d/0x270 kernel/time/timer.c:2143 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106 r871xu_dev_remove+0x69/0x3f0 drivers/staging/rtl8712/usb_intf.c:595 usb_unbind_interface+0x187/0x7f0 drivers/usb/core/driver.c:458 __device_release_driver drivers/base/dd.c:1240 [inline] device_release_driver_internal+0x368/0x530 drivers/base/dd.c:1263 bus_remove_device+0x1ed/0x3f0 drivers/base/bus.c:574 device_del+0x431/0xaa0 drivers/base/core.c:3775 usb_disable_device+0x2a0/0x660 drivers/usb/core/message.c:1420 usb_disconnect+0x269/0x870 drivers/usb/core/hub.c:2238 hub_port_connect drivers/usb/core/hub.c:5246 [inline] hub_port_connect_change drivers/usb/core/hub.c:5551 [inline] port_event drivers/usb/core/hub.c:5711 [inline] hub_event+0x17f7/0x4240 drivers/usb/core/hub.c:5793 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 process_scheduled_works kernel/workqueue.c:2453 [inline] worker_thread+0x73c/0xec0 kernel/workqueue.c:2539 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task kworker/1:11:7671 blocked for more than 145 seconds. Not tainted 6.3.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:11 state:D stack:28344 pid:7671 ppid:2 flags:0x00004000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: context_switch kernel/sched/core.c:5307 [inline] __schedule+0xc01/0x56c0 kernel/sched/core.c:6625 schedule+0xde/0x1a0 kernel/sched/core.c:6701 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6760 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747 addrconf_verify_work+0xd/0x20 net/ipv6/addrconf.c:4629 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 worker_thread+0x59c/0xec0 kernel/workqueue.c:2537 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Showing all locks held in the system: 5 locks held by kworker/0:0/7: #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc900000c7db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffff888147031190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #2: ffff888147031190 (&dev->mutex){....}-{3:3}, at: hub_event+0x126/0x4240 drivers/usb/core/hub.c:5739 #3: ffff88801dd17190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #3: ffff88801dd17190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xeb/0x870 drivers/usb/core/hub.c:2229 #4: ffff88801db82118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #4: ffff88801db82118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1063 [inline] #4: ffff88801db82118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x8c/0x530 drivers/base/dd.c:1260 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8b185270 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510 1 lock held by rcu_tasks_trace/13: #0: ffffffff8b184f70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:510 3 locks held by kworker/0:1/14: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90000137db8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 5 locks held by kworker/1:0/22: #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc900001c7db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffff88801f3c1190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #2: ffff88801f3c1190 (&dev->mutex){....}-{3:3}, at: hub_event+0x126/0x4240 drivers/usb/core/hub.c:5739 #3: ffff888022b9d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #3: ffff888022b9d190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xeb/0x870 drivers/usb/core/hub.c:2229 #4: ffff88806b5c6118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #4: ffff88806b5c6118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1063 [inline] #4: ffff88806b5c6118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x8c/0x530 drivers/base/dd.c:1260 3 locks held by kworker/1:1/26: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90000a1fdb8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 1 lock held by khungtaskd/28: #0: ffffffff8b185dc0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6495 3 locks held by kworker/0:2/892: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90004427db8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 3 locks held by kworker/1:2/895: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90004597db8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 3 locks held by kworker/0:3/4366: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90005687db8 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0x9/0x20 net/switchdev/switchdev.c:75 2 locks held by dhcpcd/4617: #0: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x186/0x17a0 net/ipv4/devinet.c:1071 #1: ffff8880797b4df0 (&padapter->mutex_start){+.+.}-{3:3}, at: netdev_open+0x34/0x5f0 drivers/staging/rtl8712/os_intfs.c:391 2 locks held by getty/4714: #0: ffff888025a3a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb73/0x1040 drivers/tty/n_tty.c:2177 3 locks held by kworker/1:3/5048: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc9000380fdb8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 5 locks held by kworker/1:4/5049: #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc9000381fdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffff88801f3d9190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #2: ffff88801f3d9190 (&dev->mutex){....}-{3:3}, at: hub_event+0x126/0x4240 drivers/usb/core/hub.c:5739 #3: ffff88806e0cf190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #3: ffff88806e0cf190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xeb/0x870 drivers/usb/core/hub.c:2229 #4: ffff88806d8a7118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #4: ffff88806d8a7118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1063 [inline] #4: ffff88806d8a7118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x8c/0x530 drivers/base/dd.c:1260 3 locks held by kworker/0:4/5050: #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc9000382fdb8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xd/0x20 net/ipv6/addrconf.c:4629 3 locks held by kworker/0:5/5051: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc9000383fdb8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 6 locks held by kworker/1:6/5547: #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90004d5fdb8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffff888147021190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #2: ffff888147021190 (&dev->mutex){....}-{3:3}, at: hub_event+0x126/0x4240 drivers/usb/core/hub.c:5739 #3: ffff88806d9d9190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #3: ffff88806d9d9190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xeb/0x870 drivers/usb/core/hub.c:2229 #4: ffff88806af02118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #4: ffff88806af02118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1063 [inline] #4: ffff88806af02118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x8c/0x530 drivers/base/dd.c:1260 #5: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0xd/0x20 net/core/dev.c:10916 3 locks held by kworker/1:7/5552: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90004d8fdb8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 3 locks held by kworker/0:7/5573: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90004e0fdb8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 5 locks held by kworker/1:8/5603: #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90004fa7db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffff88801f4a9190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #2: ffff88801f4a9190 (&dev->mutex){....}-{3:3}, at: hub_event+0x126/0x4240 drivers/usb/core/hub.c:5739 #3: ffff88806b9e5190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #3: ffff88806b9e5190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xeb/0x870 drivers/usb/core/hub.c:2229 #4: ffff88806c6c4118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #4: ffff88806c6c4118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1063 [inline] #4: ffff88806c6c4118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x8c/0x530 drivers/base/dd.c:1260 5 locks held by kworker/0:8/5615: #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888015bf9d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc90005027db8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffff888147009190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #2: ffff888147009190 (&dev->mutex){....}-{3:3}, at: hub_event+0x126/0x4240 drivers/usb/core/hub.c:5739 #3: ffff88801af8a190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #3: ffff88801af8a190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xeb/0x870 drivers/usb/core/hub.c:2229 #4: ffff88807d014118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:832 [inline] #4: ffff88807d014118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1063 [inline] #4: ffff88807d014118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x8c/0x530 drivers/base/dd.c:1260 4 locks held by udevd/5621: #0: ffff88801aa79668 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xc2/0x10f0 fs/seq_file.c:182 #1: ffff88806e1f6088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x44/0x390 fs/kernfs/file.c:154 #2: ffff88807efa6a00 (kn->active#30){++++}-{0:0}, at: kernfs_seq_start+0x67/0x390 fs/kernfs/file.c:155 #3: ffff88801dd17190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:837 [inline] #3: ffff88801dd17190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x1f/0x80 drivers/usb/core/sysfs.c:142 4 locks held by udevd/5626: #0: ffff88806dc018b8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xc2/0x10f0 fs/seq_file.c:182 #1: ffff888025b1f088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x44/0x390 fs/kernfs/file.c:154 #2: ffff888020904918 (kn->active#30){++++}-{0:0}, at: kernfs_seq_start+0x67/0x390 fs/kernfs/file.c:155 #3: ffff88806d9d9190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:837 [inline] #3: ffff88806d9d9190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x1f/0x80 drivers/usb/core/sysfs.c:142 4 locks held by udevd/5695: #0: ffff888027afce80 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xc2/0x10f0 fs/seq_file.c:182 #1: ffff88806d6de888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x44/0x390 fs/kernfs/file.c:154 #2: ffff888070f33008 (kn->active#30){++++}-{0:0}, at: kernfs_seq_start+0x67/0x390 fs/kernfs/file.c:155 #3: ffff88806e0cf190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:837 [inline] #3: ffff88806e0cf190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x1f/0x80 drivers/usb/core/sysfs.c:142 3 locks held by kworker/1:9/6992: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc9000b287db8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 3 locks held by kworker/1:10/7238: #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff888010470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc9000b777db8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0xf/0x40 net/core/dev.c:10172 3 locks held by kworker/1:11/7671: #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline] #0: ffff88802501fd38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x78a/0x1400 kernel/workqueue.c:2361 #1: ffffc9000378fdb8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7b7/0x1400 kernel/workqueue.c:2365 #2: ffffffff8c8f6688 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xd/0x20 net/ipv6/addrconf.c:4629 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x64/0xb0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x175/0x200 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1bc/0x200 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0x9f9/0xcf0 kernel/hung_task.c:379 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1005 Comm: kworker/u4:4 Not tainted 6.3.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:check_wait_context kernel/locking/lockdep.c:4744 [inline] RIP: 0010:__lock_acquire+0x535/0x5d40 kernel/locking/lockdep.c:5006 Code: 13 00 00 0f b6 85 b9 00 00 00 48 8b 0c 24 84 c0 41 0f 44 c7 48 c1 e9 03 88 44 24 50 48 b8 00 00 00 00 00 fc ff df 0f b6 04 01 <84> c0 74 08 3c 03 0f 8e ff 12 00 00 41 8b b5 30 0a 00 00 41 89 f6 RSP: 0018:ffffc9000499f9b0 EFLAGS: 00000802 RAX: 0000000000000000 RBX: ffff88807969d318 RCX: 1ffff11003b1c4e6 RDX: 0000000000000006 RSI: 0000000000000008 RDI: ffffffff8f5e5b99 RBP: ffffffff8f5e5ae0 R08: 0000000000000000 R09: ffffffff8f595b17 R10: fffffbfff1eb2b62 R11: 0000000000000000 R12: ffff88801d8e2788 R13: ffff88801d8e1d00 R14: 0000000000040000 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fac9297a110 CR3: 00000000241ca000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5669 [inline] lock_acquire+0x1af/0x520 kernel/locking/lockdep.c:5634 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] batadv_nc_purge_paths+0xc0/0x2e0 net/batman-adv/network-coding.c:442 batadv_nc_worker+0x6e0/0xd90 net/batman-adv/network-coding.c:720 process_one_work+0x865/0x1400 kernel/workqueue.c:2390 worker_thread+0x59c/0xec0 kernel/workqueue.c:2537 kthread+0x298/0x340 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308