INFO: task kworker/0:1:7 blocked for more than 143 seconds. Not tainted 5.17.0-rc2-syzkaller-00044-gc3c9cee59282 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:22944 pid: 7 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: 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 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: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 Showing all locks held in the system: 6 locks held by kworker/0:1/7: #0: ffff888103bd3138 ((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:631 [inline] ){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] ){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc9000007fdb8 ((work_completion)(&hub->events) ){+.+.}-{0:0} , at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffff88810cf4f220 (&dev->mutex ){....}-{3:3} , at: device_lock include/linux/device.h:767 [inline] , at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5692 #3: ffff8881188da220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #3: ffff8881188da220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2219 #4: ffff8881188dd1a8 (&dev->mutex ){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] ){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1033 [inline] ){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1234 [inline] ){....}-{3:3}, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1260 #5: ffffffff88882428 ( rtnl_mutex){+.+.}-{3:3} , at: unregister_netdev+0xe/0x20 net/core/dev.c:10473 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 5 locks held by dhcpcd/1206: 2 locks held by getty/1230: #0: ffff88810e54e098 (&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 4 locks held by kworker/u4:6/1307: #0: ffff8881001c2938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline] ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc9000120fdb8 (net_cleanup_work ){+.+.}-{0:0} , at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffffffff8886e7d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb00 net/core/net_namespace.c:559 #3: ffffffff88882428 (rtnl_mutex ){+.+.}-{3:3} , at: sit_exit_batch_net+0x88/0x750 net/ipv6/sit.c:1946 3 locks held by kworker/1:4/4055: #0: ffff88810e02a138 ((wq_completion)ipv6_addrconf ){+.+.}-{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:1280 [inline] , at: set_work_data kernel/workqueue.c:631 [inline] , at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] , at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc900026d7db8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffffffff88882428 (rtnl_mutex ){+.+.}-{3:3} , at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4608 1 lock held by syz-executor.2/6887: #0: ffffffff88882428 (rtnl_mutex){+.+.}-{3:3} , at: rtnl_lock net/core/rtnetlink.c:72 [inline] , at: rtnetlink_rcv_msg+0x3be/0xb80 net/core/rtnetlink.c:5589 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 25 Comm: khungtaskd Not tainted 5.17.0-rc2-syzkaller-00044-gc3c9cee59282 #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: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 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1206 Comm: dhcpcd Not tainted 5.17.0-rc2-syzkaller-00044-gc3c9cee59282 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skip_atoi+0x2/0xe0 lib/vsprintf.c:157 Code: e9 11 ff ff ff 48 89 ef e8 5b ec 5c ff eb 89 4c 89 e7 48 89 04 24 e8 cd ec 5c ff 48 8b 04 24 eb ae cc cc cc cc cc cc cc 41 56 <41> 55 49 89 fd 41 54 55 53 e8 30 de 2d ff 4c 89 ea 48 b8 00 00 00 RSP: 0018:ffffc90000e4ed38 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffffff86284821 RCX: 0000000000000000 RDX: ffff888110f80000 RSI: ffffffff82160898 RDI: ffffc90000e4ed80 RBP: ffffc90000e4ee60 R08: 0000000000000009 R09: ffffffff8216022a R10: ffffffff82160681 R11: 0000000000000035 R12: ffffffff86284822 R13: ffffffff86284821 R14: 1ffff920001c9dac R15: 0000000000000035 FS: 00007ff184e4b740(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c00060c000 CR3: 000000011552d000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: format_decode+0x882/0xad0 lib/vsprintf.c:2563 vsnprintf+0x155/0x14f0 lib/vsprintf.c:2747 sprintf+0xc0/0x100 lib/vsprintf.c:2997 print_time kernel/printk/printk.c:1261 [inline] info_print_prefix+0x248/0x340 kernel/printk/printk.c:1287 record_print_text+0x14d/0x3e0 kernel/printk/printk.c:1336 console_unlock+0x2d8/0xb70 kernel/printk/printk.c:2692 vprintk_emit+0x198/0x4f0 kernel/printk/printk.c:2245 dev_vprintk_emit+0x36e/0x3b2 drivers/base/core.c:4604 dev_printk_emit+0xba/0xf1 drivers/base/core.c:4615 __netdev_printk+0x1c6/0x27a net/core/dev.c:10782 netdev_err+0xd7/0x109 net/core/dev.c:10834 asix_set_sw_mii drivers/net/usb/asix_common.c:303 [inline] asix_set_sw_mii drivers/net/usb/asix_common.c:297 [inline] asix_check_host_enable.cold+0x22/0x66 drivers/net/usb/asix_common.c:74 asix_mdio_read+0x90/0x220 drivers/net/usb/asix_common.c:499 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+0x2c4/0x4d0 net/core/dev.c:1407 __dev_change_flags+0x583/0x750 net/core/dev.c:8139 dev_change_flags+0x93/0x170 net/core/dev.c:8210 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:1122 sock_ioctl+0x2f1/0x640 net/socket.c:1239 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: 0033:0x7ff184f390e7 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:00007ffddf2c9a48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff184e4b6c8 RCX: 00007ff184f390e7 RDX: 00007ffddf2d9c38 RSI: 0000000000008914 RDI: 0000000000000005 RBP: 00007ffddf2e9de8 R08: 00007ffddf2d9bf8 R09: 00007ffddf2d9ba8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffddf2d9c38 R14: 0000000000000028 R15: 0000000000008914 ---------------- Code disassembly (best guess): 0: e9 11 ff ff ff jmpq 0xffffff16 5: 48 89 ef mov %rbp,%rdi 8: e8 5b ec 5c ff callq 0xff5cec68 d: eb 89 jmp 0xffffff98 f: 4c 89 e7 mov %r12,%rdi 12: 48 89 04 24 mov %rax,(%rsp) 16: e8 cd ec 5c ff callq 0xff5cece8 1b: 48 8b 04 24 mov (%rsp),%rax 1f: eb ae jmp 0xffffffcf 21: cc int3 22: cc int3 23: cc int3 24: cc int3 25: cc int3 26: cc int3 27: cc int3 28: 41 56 push %r14 * 2a: 41 55 push %r13 <-- trapping instruction 2c: 49 89 fd mov %rdi,%r13 2f: 41 54 push %r12 31: 55 push %rbp 32: 53 push %rbx 33: e8 30 de 2d ff callq 0xff2dde68 38: 4c 89 ea mov %r13,%rdx 3b: 48 rex.W 3c: b8 .byte 0xb8 3d: 00 00 add %al,(%rax)