INFO: task kworker/0:4:4102 blocked for more than 143 seconds. Not tainted 5.16.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:4 state:D stack:22448 pid: 4102 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0x931/0x2320 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385 __mutex_lock_common kernel/locking/mutex.c:680 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740 unregister_netdev+0xe/0x20 net/core/dev.c:11138 usbnet_disconnect+0x139/0x270 drivers/net/usb/usbnet.c:1623 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 __device_release_driver+0x5d7/0x700 drivers/base/dd.c:1205 device_release_driver_internal drivers/base/dd.c:1236 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1259 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x502/0xd60 drivers/base/core.c:3581 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:5202 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5660 [inline] hub_event+0x1e39/0x44d0 drivers/usb/core/hub.c:5742 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x40b/0x500 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Showing all locks held in the system: 1 lock held by khungtaskd/25: #0: ffffffff87891780 ( rcu_read_lock){....}-{1:2} , at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 6 locks held by kworker/1:2/705: 4 locks held by dhcpcd/1205: 2 locks held by getty/1227: #0: ffff88810e3c0098 (&tty->ldisc_sem ){++++}-{0:0} , at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc900000432e8 (&ldata->atomic_read_lock){+.+.}-{3:3} , at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 6 locks held by kworker/1:4/4093: 6 locks held by kworker/0:4/4102: #0: ffff888103981d38 ((wq_completion)usb_hub_wq ){+.+.}-{0:0} , at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] , at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] , at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] , at: set_work_data kernel/workqueue.c:635 [inline] , at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] , at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269 #1: ffffc900020c7db0 ( (work_completion)(&hub->events) ){+.+.}-{0:0} , at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273 #2: ffff88810d14f220 (&dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:760 [inline] , at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5688 #3: ffff888113cb0220 (&dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:760 [inline] , at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2219 #4: ffff888115a351a8 (&dev->mutex ){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] ){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1032 [inline] ){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1233 [inline] ){....}-{3:3}, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1259 #5: ffffffff8886aea8 ( rtnl_mutex){+.+.}-{3:3} , at: unregister_netdev+0xe/0x20 net/core/dev.c:11138 3 locks held by kworker/0:8/7044: #0: ffff88810da42538 ((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:1198 [inline] ){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] ){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] ){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269 #1: ffffc90009d0fdb0 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273 #2: ffffffff8886aea8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4595 3 locks held by udevd/18856: #0: ffff88810da28088 ( &of->mutex){+.+.}-{3:3} , at: kernfs_file_read_iter fs/kernfs/file.c:203 [inline] , at: kernfs_fop_read_iter+0x185/0x5f0 fs/kernfs/file.c:242 #1: ffff88810d1b21d8 (kn->active#51 ){++++}-{0:0} , at: kernfs_file_read_iter fs/kernfs/file.c:204 [inline] , at: kernfs_fop_read_iter+0x1a8/0x5f0 fs/kernfs/file.c:242 #2: ffff88810c0f1220 (&dev->mutex){....}-{3:3} , at: device_lock_interruptible include/linux/device.h:765 [inline] , at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 25 Comm: khungtaskd Not tainted 5.16.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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+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:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x40b/0x500 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1205 Comm: dhcpcd Not tainted 5.16.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:110 Code: c7 80 62 9a 89 e8 78 03 62 00 eb b0 66 0f 1f 44 00 00 be 01 00 00 00 e9 76 40 1d 00 cc cc cc cc cc cc 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffffc90000007eb8 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff87330a80 RCX: 0000000000000020 RDX: 1ffffffff0e66152 RSI: 0000000000050094 RDI: 0000000000000380 RBP: ffff8881f6827240 R08: 000000000000003f R09: 0000000000000000 R10: ffffffff81368d27 R11: 0000000000000000 R12: 0000000000050094 R13: 0000000000000020 R14: 0000000000000000 R15: ffff8881f682a1c0 FS: 00007f3595afa740(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556d85b38 CR3: 00000001146ab000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:394 [inline] lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:469 clockevents_program_event+0x254/0x370 kernel/time/clockevents.c:334 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:44 hrtimer_interrupt+0x36e/0x790 kernel/time/hrtimer.c:1824 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x89/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200 Code: 48 89 ef 5d e9 91 5b 2e 00 5d be 03 00 00 00 e9 a6 b1 c0 00 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 39 e0 be 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc90000f8f2d8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88811458d400 RSI: ffffffff812ba591 RDI: 0000000000000003 RBP: ffffc90000f8f318 R08: 0000000000000000 R09: ffffffff8a7b688f R10: ffffffff812ba587 R11: 0000000000000000 R12: 0000000000000037 R13: ffff8881065e8000 R14: 0000000000000200 R15: ffffc90000f8f438 console_trylock_spinning kernel/printk/printk.c:1885 [inline] vprintk_emit+0x377/0x4f0 kernel/printk/printk.c:2244 dev_vprintk_emit+0x36e/0x3b2 drivers/base/core.c:4594 dev_printk_emit+0xba/0xf1 drivers/base/core.c:4605 __netdev_printk+0x1c6/0x27a net/core/dev.c:11447 netdev_err+0xd7/0x109 net/core/dev.c:11499 asix_set_sw_mii drivers/net/usb/asix_common.c:301 [inline] asix_set_sw_mii drivers/net/usb/asix_common.c:295 [inline] asix_check_host_enable.cold+0x23/0x63 drivers/net/usb/asix_common.c:72 asix_mdio_read+0x90/0x220 drivers/net/usb/asix_common.c:497 asix_phy_reset+0x104/0x170 drivers/net/usb/asix_devices.c:215 ax88178_reset+0x3f5/0x1310 drivers/net/usb/asix_devices.c:977 usbnet_open+0xc8/0x5d0 drivers/net/usb/usbnet.c:894 __dev_open+0x2bc/0x4d0 net/core/dev.c:1490 __dev_change_flags+0x583/0x750 net/core/dev.c:8796 dev_change_flags+0x93/0x170 net/core/dev.c:8867 devinet_ioctl+0x15d1/0x1ca0 net/ipv4/devinet.c:1144 inet_ioctl+0x1e6/0x320 net/ipv4/af_inet.c:969 sock_do_ioctl+0xcc/0x230 net/socket.c:1118 sock_ioctl+0x2f1/0x640 net/socket.c:1235 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 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+0x44/0xae RIP: 0033:0x7f3595be80e7 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:00007fff90d2f2a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f3595afa6c8 RCX: 00007f3595be80e7 RDX: 00007fff90d3f498 RSI: 0000000000008914 RDI: 0000000000000005 RBP: 00007fff90d4f648 R08: 00007fff90d3f458 R09: 00007fff90d3f408 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff90d3f498 R14: 0000000000000028 R15: 0000000000008914 ---------------- Code disassembly (best guess): 0: c7 80 62 9a 89 e8 78 movl $0x620378,-0x1776659e(%rax) 7: 03 62 00 a: eb b0 jmp 0xffffffbc c: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 12: be 01 00 00 00 mov $0x1,%esi 17: e9 76 40 1d 00 jmpq 0x1d4092 1c: cc int3 1d: cc int3 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: 89 ff mov %edi,%edi 24: 89 b7 00 c0 5f ff mov %esi,-0xa04000(%rdi) * 2a: c3 retq <-- trapping instruction 2b: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 32: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 39: fc ff df 3c: 53 push %rbx 3d: 89 fb mov %edi,%ebx 3f: 48 rex.W