INFO: task kworker/1:3:22078 blocked for more than 143 seconds. Not tainted 5.19.0-syzkaller-10391-gb2a88c212e65 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:3 state:D stack:22784 pid:22078 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5178 [inline] __schedule+0x93f/0x26e0 kernel/sched/core.c:6490 schedule+0xda/0x1b0 kernel/sched/core.c:6566 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6625 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747 unregister_netdev+0xe/0x20 net/core/dev.c:10920 usbnet_disconnect+0xd8/0x270 drivers/net/usb/usbnet.c:1615 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:520 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:512 __device_release_driver drivers/base/dd.c:1209 [inline] device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1235 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3704 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x278/0x6ec drivers/usb/core/hub.c:2235 hub_port_connect drivers/usb/core/hub.c:5197 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5653 [inline] hub_event+0x1e83/0x4690 drivers/usb/core/hub.c:5735 process_one_work+0x996/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2ef/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffffffff87a95310 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/26: #0: ffffffff87a95e60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492 3 locks held by kworker/1:2/717: #0: ffff88811052b138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88811052b138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88811052b138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff88811052b138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff88811052b138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff88811052b138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc90001f5fda8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work) ){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffffffff88ad90e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xe/0x20 net/ipv6/addrconf.c:4620 3 locks held by dhcpcd/1215: 2 locks held by getty/1239: #0: ffff88810020a098 (&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+0xe50/0x13c0 drivers/tty/n_tty.c:2124 3 locks held by kworker/0:6/4128: #0: ffff88811052b138 ((wq_completion)ipv6_addrconf ){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] ){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] ){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] ){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] ){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc90001d77da8 ((work_completion)(&(&net->ipv6.addr_chk_work)->work) ){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffffffff88ad90e8 (rtnl_mutex){+.+.}-{3:3} , at: addrconf_verify_work+0xe/0x20 net/ipv6/addrconf.c:4620 3 locks held by kworker/1:7/5528: 6 locks held by kworker/0:5/14731: #0: ffff888109bcf138 ( (wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] (wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] (wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] (wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] (wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] (wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000cf9fda8 ((work_completion)(&hub->events) ){+.+.}-{0:0} , at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f2bc190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff88810f2bc190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5681 #3: ffff88810f2bf4f0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3103 [inline] (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5249 [inline] (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5653 [inline] (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2001/0x4690 drivers/usb/core/hub.c:5735 #4: ffff88810e686e68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5250 [inline] (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5653 [inline] (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x202a/0x4690 drivers/usb/core/hub.c:5735 #5: ffffffff884142b0 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}, at: hub_port_reset+0x188/0x1ce0 drivers/usb/core/hub.c:2960 6 locks held by kworker/1:3/22078: #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000e867da8 ((work_completion)(&hub->events) ){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f506190 (&dev->mutex){....}-{3:3} , at: device_lock include/linux/device.h:835 [inline] , at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5681 #3: ffff88810f6a3190 (&dev->mutex){....}-{3:3} , at: device_lock include/linux/device.h:835 [inline] , at: usb_disconnect.cold+0x43/0x6ec drivers/usb/core/hub.c:2226 #4: ffff88810f6a2118 (&dev->mutex ){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] ){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1038 [inline] ){....}-{3:3}, at: device_release_driver_internal+0xa0/0x700 drivers/base/dd.c:1232 #5: ffffffff88ad90e8 (rtnl_mutex){+.+.}-{3:3}, at: unregister_netdev+0xe/0x20 net/core/dev.c:10920 6 locks held by kworker/1:4/3690: #0: ffff888109bcf138 ((wq_completion)usb_hub_wq ){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] ){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] ){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] ){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] ){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000a7b7da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f436190 (&dev->mutex){....}-{3:3} , at: device_lock include/linux/device.h:835 [inline] , at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5681 #3: ffff888108eda190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff888108eda190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:948 #4: ffff88811b14a118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:948 #5: ffffffff88ad90e8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x11/0x50 net/core/dev.c:10194 3 locks held by kworker/0:4/6988: #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888100064d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc90002967da8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffffffff88ad90e8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x11/0x50 net/core/dev.c:10194 3 locks held by udevd/9168: #0: ffff888112785088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline] ffff888112785088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x710 fs/kernfs/file.c:300 #1: ffff8881379681d8 (kn->active #51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline] #51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x710 fs/kernfs/file.c:300 #2: ffff888118f2b190 (&dev->mutex ){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline] ){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 3 locks held by udevd/9192: #0: ffff88813de5a088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline] #0: ffff88813de5a088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x710 fs/kernfs/file.c:300 #1: ffff888112b4d830 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline] (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x710 fs/kernfs/file.c:300 #2: ffff888108eda190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline] (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 5 locks held by kworker/0:0/10218: #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109bcf138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc900070b7da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f344190 ( &dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] &dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4690 drivers/usb/core/hub.c:5681 #3: ffff88813b6b4190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff88813b6b4190 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x6ec drivers/usb/core/hub.c:2226 #4: ffff888118e9b118 (&dev->mutex){....}-{3:3} , at: device_lock include/linux/device.h:835 [inline] , at: __device_driver_lock drivers/base/dd.c:1038 [inline] , at: device_release_driver_internal+0xa0/0x700 drivers/base/dd.c:1232 6 locks held by kworker/1:9/10290: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.19.0-syzkaller-10391-gb2a88c212e65 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __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+0x1e6/0x230 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:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1215 Comm: dhcpcd Not tainted 5.19.0-syzkaller-10391-gb2a88c212e65 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:desc_read+0x16e/0x380 kernel/printk/printk_ringbuffer.c:481 Code: a0 01 00 00 e8 f3 1d 19 00 48 85 db 74 17 e8 e9 1d 19 00 48 8d 75 08 ba 10 00 00 00 48 8d 7b 08 e8 77 24 4e 00 e8 d2 1d 19 00 <48> 83 3c 24 00 74 46 e8 c6 1d 19 00 4c 89 fa 48 b8 00 00 00 00 00 RSP: 0018:ffffc90001106df8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffc90001106fb0 RCX: 0000000000000000 RDX: ffff888111e9b900 RSI: ffffffff812c5a3e RDI: ffffc90001106fc8 RBP: ffffffff87a729e0 R08: 0000000000000001 R09: ffffc90001106fc7 R10: fffff52000220df8 R11: 0000000000000001 R12: 000000010004b3e0 R13: 0000000000000002 R14: 800000010004b3e0 R15: ffffffff87a121c0 FS: 00007f3e6e3f7740(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcf2cef1580 CR3: 0000000117c38000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: desc_read_finalized_seq+0x81/0x1c0 kernel/printk/printk_ringbuffer.c:1763 prb_read kernel/printk/printk_ringbuffer.c:1811 [inline] _prb_read_valid+0x1cd/0x710 kernel/printk/printk_ringbuffer.c:1891 prb_read_valid+0x75/0xa0 kernel/printk/printk_ringbuffer.c:1940 console_emit_next_record.constprop.0+0x10a/0x840 kernel/printk/printk.c:2690 console_flush_all kernel/printk/printk.c:2794 [inline] console_unlock+0x37a/0x5a0 kernel/printk/printk.c:2861 vprintk_emit+0x1b9/0x5f0 kernel/printk/printk.c:2271 dev_vprintk_emit+0x36e/0x3b2 drivers/base/core.c:4736 dev_printk_emit+0xba/0xf1 drivers/base/core.c:4747 __netdev_printk+0x1c6/0x27a net/core/dev.c:11228 netdev_err+0xd7/0x109 net/core/dev.c:11280 asix_set_sw_mii drivers/net/usb/asix_common.c:78 [inline] asix_check_host_enable.cold+0x22/0x66 drivers/net/usb/asix_common.c:98 __asix_mdio_read+0x93/0x220 drivers/net/usb/asix_common.c:506 asix_phy_reset+0x104/0x170 drivers/net/usb/asix_devices.c:215 ax88178_reset+0x42f/0x1420 drivers/net/usb/asix_devices.c:983 usbnet_open+0xc8/0x5d0 drivers/net/usb/usbnet.c:889 __dev_open+0x297/0x4d0 net/core/dev.c:1432 __dev_change_flags+0x583/0x750 net/core/dev.c:8556 dev_change_flags+0x93/0x170 net/core/dev.c:8627 devinet_ioctl+0x15d1/0x1ca0 net/ipv4/devinet.c:1146 inet_ioctl+0x1e6/0x320 net/ipv4/af_inet.c:968 sock_do_ioctl+0xcc/0x230 net/socket.c:1169 sock_ioctl+0x2f1/0x640 net/socket.c:1286 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3e6e4e50e7 Code: 3c 1c e8 1c ff ff ff 85 c0 79 87 49 c7 c4 ff ff ff ff 5b 5d 4c 89 e0 41 5c c3 66 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 61 9d 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007ffde6b97108 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f3e6e3f76c8 RCX: 00007f3e6e4e50e7 RDX: 00007ffde6ba72f8 RSI: 0000000000008914 RDI: 0000000000000005 RBP: 00007ffde6bb74a8 R08: 00007ffde6ba72b8 R09: 00007ffde6ba7268 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffde6ba72f8 R14: 0000000000000028 R15: 0000000000008914