INFO: task kworker/1:6:1167 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:6 state:D stack:27288 pid: 1167 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4969 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6250 schedule+0xd2/0x260 kernel/sched/core.c:6323 usb_kill_urb.part.0+0x19a/0x220 drivers/usb/core/urb.c:720 usb_kill_urb+0x7f/0xa0 drivers/usb/core/urb.c:715 usb_start_wait_urb+0x24a/0x4c0 drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153 hub_port_init+0x82e/0x2f10 drivers/usb/core/hub.c:4829 hub_port_connect drivers/usb/core/hub.c:5280 [inline] hub_port_connect_change drivers/usb/core/hub.c:5488 [inline] port_event drivers/usb/core/hub.c:5634 [inline] hub_event+0x2190/0x4330 drivers/usb/core/hub.c:5716 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 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/27: #0: ffffffff8b980ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6461 1 lock held by khugepaged/33: 1 lock held by in:imklog/6167: 3 locks held by kworker/u4:6/8530: 5 locks held by kworker/1:6/1167: #0: ffff8881421b6d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881421b6d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff8881421b6d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff8881421b6d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff8881421b6d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff8881421b6d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2269 #1: ffffc9000514fdb0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2273 #2: ffff88801f22b220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88801f22b220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4330 drivers/usb/core/hub.c:5662 #3: ffff888147fb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3086 [inline] #3: ffff888147fb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5279 [inline] #3: ffff888147fb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5488 [inline] #3: ffff888147fb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5634 [inline] #3: ffff888147fb15c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2178/0x4330 drivers/usb/core/hub.c:5716 #4: ffff88801f226d68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_init+0x1b5/0x2f10 drivers/usb/core/hub.c:4703 2 locks held by syz-executor.5/9393: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0x405/0x4f0 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: 6169 Comm: rs:main Q:Reg Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_note_context_switch+0x226/0x17f0 kernel/rcu/tree_plugin.h:355 Code: 00 84 c0 75 76 65 48 8b 1c 25 40 70 02 00 48 8d bb 8c 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 <48> 89 fa 83 e2 07 38 d0 7f 08 84 c0 0f 85 87 0c 00 00 0f b6 83 8c RSP: 0018:ffffc9000c20f9e8 EFLAGS: 00000807 RAX: 0000000000000000 RBX: ffff88807cfb2280 RCX: 0000000000000001 RDX: 1ffff1100f9f64e1 RSI: 0000000000000001 RDI: ffff88807cfb270c RBP: ffff8880b9c3a995 R08: 0000000000000000 R09: ffffffff8d6f7757 R10: fffffbfff1adeeea R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8d6fab6c R14: 0000000000000000 R15: ffff88807cfb2280 FS: 00007f5354b04700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd4be5b2000 CR3: 000000006f344000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __schedule+0x238/0x4940 kernel/sched/core.c:6147 schedule+0xd2/0x260 kernel/sched/core.c:6323 freezable_schedule include/linux/freezer.h:172 [inline] futex_wait_queue+0x144/0x3b0 kernel/futex/waitwake.c:355 futex_wait+0x2c9/0x670 kernel/futex/waitwake.c:656 do_futex+0x205/0x390 kernel/futex/syscalls.c:122 __do_sys_futex kernel/futex/syscalls.c:199 [inline] __se_sys_futex kernel/futex/syscalls.c:180 [inline] __x64_sys_futex+0x1b0/0x4a0 kernel/futex/syscalls.c:180 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: 0033:0x7f535754517f Code: 30 83 f8 20 75 15 be 8b 00 00 00 b8 ca 00 00 00 0f 05 83 f8 00 41 0f 94 c0 eb 0f be 80 00 00 00 45 30 c0 b8 ca 00 00 00 0f 05 <8b> 3c 24 e8 49 2d 00 00 48 8b 7c 24 08 be 01 00 00 00 31 c0 f0 0f RSP: 002b:00007f5354b03c70 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f535754517f RDX: 0000000000001909 RSI: 0000000000000080 RDI: 000056131094c28c RBP: 000056131094c288 R08: 000056131094c000 R09: 0000000000000c84 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5354b03cd0 R13: 0000000000000000 R14: 000056130ec68290 R15: 0000000000000000 ---------------- Code disassembly (best guess): 0: 00 84 c0 75 76 65 48 add %al,0x48657675(%rax,%rax,8) 7: 8b 1c 25 40 70 02 00 mov 0x27040,%ebx e: 48 8d bb 8c 04 00 00 lea 0x48c(%rbx),%rdi 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 89 fa mov %rdi,%rdx 22: 48 c1 ea 03 shr $0x3,%rdx 26: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax * 2a: 48 89 fa mov %rdi,%rdx <-- trapping instruction 2d: 83 e2 07 and $0x7,%edx 30: 38 d0 cmp %dl,%al 32: 7f 08 jg 0x3c 34: 84 c0 test %al,%al 36: 0f 85 87 0c 00 00 jne 0xcc3 3c: 0f .byte 0xf 3d: b6 83 mov $0x83,%dh 3f: 8c .byte 0x8c