INFO: task kworker/0:7:4417 blocked for more than 143 seconds. Not tainted 5.17.0-rc6-syzkaller-00100-g98d107b84614 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:7 state:D stack:21872 pid: 4417 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4995 [inline] __schedule+0x931/0x22e0 kernel/sched/core.c:6304 schedule+0xd2/0x260 kernel/sched/core.c:6377 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6436 __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+0x627/0x760 drivers/base/dd.c:1209 device_release_driver_internal drivers/base/dd.c:1242 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1265 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529 device_del+0x4f3/0xc80 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:5207 [inline] hub_port_connect_change drivers/usb/core/hub.c:5507 [inline] port_event drivers/usb/core/hub.c:5665 [inline] hub_event+0x1e39/0x44d0 drivers/usb/core/hub.c:5747 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: 1 lock held by khungtaskd/25: #0: ffffffff87891880 (rcu_read_lock){....}-{1:2} , at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460 1 lock held by dhcpcd/1205: 2 locks held by getty/1227: #0: ffff88810ed41098 (&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:2075 3 locks held by kworker/0:5/4041: #0: ffff8881039d3938 ((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:631 [inline] ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc90001787db8 ((work_completion)(&hub->events)){+.+.}-{0:0} , at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffff88810ced5220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #2: ffff88810ced5220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5693 6 locks held by kworker/1:6/4098: 6 locks held by kworker/1:8/4386: 6 locks held by kworker/0:7/4417: #0: ffff8881039d3938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881039d3938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881039d3938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff8881039d3938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline] #0: ffff8881039d3938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] #0: ffff8881039d3938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc90008497db8 ((work_completion)(&hub->events) ){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffff88810cfdd220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #2: ffff88810cfdd220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5693 #3: ffff88811a97c220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #3: ffff88811a97c220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2219 #4: ffff88811a97a1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] ffff88811a97a1a8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1036 [inline] ffff88811a97a1a8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1239 [inline] ffff88811a97a1a8 (&dev->mutex){....}-{3:3}, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1265 #5: ffffffff88885b68 (rtnl_mutex ){+.+.}-{3:3} , at: unregister_netdev+0xe/0x20 net/core/dev.c:10473 3 locks held by udevd/8762: #0: ffff88811090f088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:203 [inline] #0: ffff88811090f088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x6f0 fs/kernfs/file.c:242 #1: ffff888116eb20f0 ( kn->active #51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:204 [inline] #51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x6f0 fs/kernfs/file.c:242 #2: ffff88811ad12220 (&dev->mutex){....}-{3:3} , at: device_lock_interruptible include/linux/device.h:772 [inline] , at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 3 locks held by udevd/12014: #0: ffff88810e10fc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:203 [inline] #0: ffff88810e10fc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x6f0 fs/kernfs/file.c:242 #1: ffff88810ca46008 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:204 [inline] (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x6f0 fs/kernfs/file.c:242 #2: ffff888116bce220 (&dev->mutex ){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:772 [inline] ){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 6 locks held by kworker/0:6/12703: #0: ffff8881039d3938 ((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: ffffc9000263fdb8 ( (work_completion)(&hub->events) ){+.+.}-{0:0} , at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffff88810d135220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #2: ffff88810d135220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c5/0x44d0 drivers/usb/core/hub.c:5693 #3: ffff888116bce220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:767 [inline] #3: ffff888116bce220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948 #4: ffff8881375551a8 (&dev->mutex){....}-{3:3} , at: device_lock include/linux/device.h:767 [inline] , at: __device_attach+0x7a/0x4a0 drivers/base/dd.c:948 #5: ffffffff88885b68 ( rtnl_mutex ){+.+.}-{3:3}, at: ieee80211_register_hw+0x1b50/0x3ec0 net/mac80211/main.c:1242 3 locks held by kworker/0:8/12704: #0: ffff88810e112538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ffff88810e112538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] ffff88810e112538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] ffff88810e112538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline] ffff88810e112538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline] ffff88810e112538 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278 #1: ffffc900029afdb8 ((addr_chk_work).work){+.+.}-{0:0}, at: process_one_work+0x8c4/0x1650 kernel/workqueue.c:2282 #2: ffffffff88885b68 (rtnl_mutex){+.+.}-{3:3} , at: addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4608 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 25 Comm: khungtaskd Not tainted 5.17.0-rc6-syzkaller-00100-g98d107b84614 #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+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:377 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: 5 Comm: kworker/0:0 Not tainted 5.17.0-rc6-syzkaller-00100-g98d107b84614 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events legacy_dvb_usb_read_remote_control RIP: 0010:check_region_inline mm/kasan/generic.c:170 [inline] RIP: 0010:kasan_check_range+0x12c/0x180 mm/kasan/generic.c:189 Code: 00 74 ef 49 8d 04 2c 48 85 d2 75 0b 48 89 da 48 29 c2 e9 55 ff ff ff 49 39 d2 75 17 49 0f be 02 41 83 e1 07 49 39 c1 7d 0a 5b 01 00 00 00 5d 41 5c c3 44 89 c2 e8 d3 ef ff ff 5b 83 f0 01 5d RSP: 0018:ffffc90000007a10 EFLAGS: 00000046 RAX: fffffbfff14fdae3 RBX: 0000000000000099 RCX: ffffffff8129254f RDX: fffffbfff14fdae3 RSI: 0000000000000008 RDI: ffffffff8a7ed710 RBP: fffffbfff14fdae2 R08: 0000000000000000 R09: ffffffff8a7ed717 R10: fffffbfff14fdae2 R11: 0000000000000001 R12: 0000000000000002 R13: ffff8881002b0000 R14: ffff8881002b09f8 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fccba8d1350 CR3: 000000012dade000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] hlock_class kernel/locking/lockdep.c:199 [inline] check_wait_context kernel/locking/lockdep.c:4725 [inline] __lock_acquire+0x6ef/0x56c0 kernel/locking/lockdep.c:4977 lock_acquire kernel/locking/lockdep.c:5639 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5604 rcu_lock_acquire include/linux/rcupdate.h:268 [inline] rcu_read_lock include/linux/rcupdate.h:694 [inline] cgroup_account_cputime include/linux/cgroup.h:794 [inline] update_curr+0x2e1/0x820 kernel/sched/fair.c:877 enqueue_entity kernel/sched/fair.c:4272 [inline] enqueue_task_fair+0x6a5/0x1e50 kernel/sched/fair.c:5620 enqueue_task kernel/sched/core.c:2010 [inline] activate_task kernel/sched/core.c:2035 [inline] ttwu_do_activate+0x181/0x450 kernel/sched/core.c:3614 ttwu_queue kernel/sched/core.c:3810 [inline] try_to_wake_up+0x4d3/0x1150 kernel/sched/core.c:4133 hrtimer_wakeup+0x43/0x60 kernel/time/hrtimer.c:1939 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x609/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 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 11 7f 2e 00 5d be 03 00 00 00 e9 76 8b c1 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 c9 6e be 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b RSP: 0018:ffffc9000005fae8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8881002b0000 RSI: ffffffff812bdbf1 RDI: 0000000000000003 RBP: ffffc9000005fb28 R08: 0000000000000000 R09: ffffffff8a7ed7d7 R10: ffffffff812bdbe7 R11: 0000000000000000 R12: 0000000000000017 R13: ffff888104fe0000 R14: 0000000000000200 R15: ffffc9000005fb78 console_trylock_spinning kernel/printk/printk.c:1885 [inline] vprintk_emit+0x377/0x4f0 kernel/printk/printk.c:2244 vprintk+0x80/0x90 kernel/printk/printk_safe.c:50 _printk+0xba/0xed kernel/printk/printk.c:2266 m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline] m920x_rc_query.cold+0x2d/0x32 drivers/media/usb/dvb-usb/m920x.c:188 legacy_dvb_usb_read_remote_control+0xf2/0x530 drivers/media/usb/dvb-usb/dvb-usb-remote.c:123 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 ---------------- Code disassembly (best guess): 0: 00 74 ef 49 add %dh,0x49(%rdi,%rbp,8) 4: 8d 04 2c lea (%rsp,%rbp,1),%eax 7: 48 85 d2 test %rdx,%rdx a: 75 0b jne 0x17 c: 48 89 da mov %rbx,%rdx f: 48 29 c2 sub %rax,%rdx 12: e9 55 ff ff ff jmpq 0xffffff6c 17: 49 39 d2 cmp %rdx,%r10 1a: 75 17 jne 0x33 1c: 49 0f be 02 movsbq (%r10),%rax 20: 41 83 e1 07 and $0x7,%r9d 24: 49 39 c1 cmp %rax,%r9 27: 7d 0a jge 0x33 29: 5b pop %rbx * 2a: b8 01 00 00 00 mov $0x1,%eax <-- trapping instruction 2f: 5d pop %rbp 30: 41 5c pop %r12 32: c3 retq 33: 44 89 c2 mov %r8d,%edx 36: e8 d3 ef ff ff callq 0xfffff00e 3b: 5b pop %rbx 3c: 83 f0 01 xor $0x1,%eax 3f: 5d pop %rbp