INFO: task kworker/0:3:16240 blocked for more than 143 seconds. Not tainted 5.15.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:23136 pid:16240 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x947/0x22b0 kernel/sched/core.c:6287 schedule+0xcf/0x270 kernel/sched/core.c:6366 rwsem_down_write_slowpath+0x8e3/0x1190 kernel/locking/rwsem.c:1107 __down_write_common kernel/locking/rwsem.c:1262 [inline] __down_write_common kernel/locking/rwsem.c:1259 [inline] __down_write kernel/locking/rwsem.c:1271 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1518 usb_deregister_dev+0xaa/0x320 drivers/usb/core/file.c:239 wdm_disconnect+0x21/0x440 drivers/usb/class/cdc-wdm.c:1212 usb_unbind_interface+0x1d8/0x8d0 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:3546 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2225 hub_port_connect drivers/usb/core/hub.c:5199 [inline] hub_port_connect_change drivers/usb/core/hub.c:5488 [inline] port_event drivers/usb/core/hub.c:5634 [inline] hub_event+0x1c9c/0x4330 drivers/usb/core/hub.c:5716 process_one_work+0x9bf/0x1620 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3c2/0x4a0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Showing all locks held in the system: 1 lock held by khungtaskd/24: #0: ffffffff87681ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6446 1 lock held by systemd-journal/1162: #0: ffff8881f682f618 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xc/0x20 kernel/sched/core.c:474 2 locks held by in:imklog/2806: #0: ffff888117446370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 #1: ffffffff876729a8 (syslog_lock){+.+.}-{3:3}, at: __debug_check_no_obj_freed lib/debugobjects.c:980 [inline] #1: ffffffff876729a8 (syslog_lock){+.+.}-{3:3}, at: debug_check_no_obj_freed+0xc7/0x420 lib/debugobjects.c:1023 6 locks held by kworker/1:10/17456: #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8a3/0x1620 kernel/workqueue.c:2268 #1: ffffc90010e7fdb0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x1620 kernel/workqueue.c:2272 #2: ffff88810ce19220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88810ce19220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4330 drivers/usb/core/hub.c:5662 #3: ffff888113fa0220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #3: ffff888113fa0220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2216 #4: ffff888110d211a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #4: ffff888110d211a8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1032 [inline] #4: ffff888110d211a8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1233 [inline] #4: ffff888110d211a8 (&dev->mutex){....}-{3:3}, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1259 #5: ffffffff87f7e9b0 (minor_rwsem#2){++++}-{3:3}, at: usb_deregister_dev+0xaa/0x320 drivers/usb/core/file.c:239 6 locks held by kworker/0:3/16240: #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:634 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:661 [inline] #0: ffff888103799938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x8a3/0x1620 kernel/workqueue.c:2268 #1: ffffc90002af7db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x1620 kernel/workqueue.c:2272 #2: ffff88810ce7d220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88810ce7d220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4330 drivers/usb/core/hub.c:5662 #3: ffff88811a4ee220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #3: ffff88811a4ee220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2216 #4: ffff8881411321a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #4: ffff8881411321a8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1032 [inline] #4: ffff8881411321a8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1233 [inline] #4: ffff8881411321a8 (&dev->mutex){....}-{3:3}, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1259 #5: ffffffff87f7e9b0 (minor_rwsem#2){++++}-{3:3}, at: usb_deregister_dev+0xaa/0x320 drivers/usb/core/file.c:239 2 locks held by agetty/3860: #0: ffff8881105bf098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc900025cb2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 2 locks held by syz-executor.2/16615: #0: ffffffff87f7e9b0 (minor_rwsem#2){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 #1: ffff88814dffc0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: khungtaskd Not tainted 5.15.0-rc3-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+0x49/0x148 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1d5/0x1f0 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+0xc0f/0xf20 kernel/hung_task.c:295 kthread+0x3c2/0x4a0 kernel/kthread.c:319 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: 1162 Comm: systemd-journal Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline] RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline] RIP: 0010:lock_is_held_type+0x51/0x110 kernel/locking/lockdep.c:5664 Code: 3e 7a 85 c0 0f 85 ad 00 00 00 65 4c 8b 24 25 80 ef 01 00 41 8b 94 24 8c 09 00 00 85 d2 0f 85 94 00 00 00 48 89 fd 41 89 f6 9c <8f> 04 24 fa 41 8b 84 24 88 09 00 00 31 db 65 ff 05 a2 c1 3e 7a 4d RSP: 0018:ffffc90002ec7908 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc90002ec7a30 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff87681ee0 RBP: ffffffff87681ee0 R08: 0000000000000000 R09: ffff8881f683054b R10: ffffed103ed060a9 R11: 0000000000000040 R12: ffff888113838000 R13: 00000000ffffffff R14: 00000000ffffffff R15: 0000000000000035 FS: 00007fa7ea20d8c0(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa7e4ef0020 CR3: 0000000112b58000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: xa_entry include/linux/xarray.h:1182 [inline] xas_find+0x410/0x7c0 lib/xarray.c:1262 find_get_entry mm/filemap.c:1978 [inline] find_get_entries+0x14b/0x840 mm/filemap.c:2042 shmem_undo_range+0x53f/0x1160 mm/shmem.c:996 shmem_truncate_range mm/shmem.c:1058 [inline] shmem_setattr+0x59f/0x8f0 mm/shmem.c:1117 notify_change+0xaef/0x10c0 fs/attr.c:410 do_truncate+0x13c/0x200 fs/open.c:64 do_sys_ftruncate+0x5e7/0x6f0 fs/open.c:192 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: 0033:0x7fa7e94cfec7 Code: 73 01 c3 48 8b 0d d1 5f 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 4d 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 5f 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffc09631c78 EFLAGS: 00000206 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 00007ffc09631cb0 RCX: 00007fa7e94cfec7 RDX: 0000564e85e13700 RSI: 0000000000800000 RDI: 0000000000000010 RBP: 00007ffc09631ca8 R08: 0000000000000008 R09: 0000564e85e13a6c R10: 0000564e85e139f0 R11: 0000000000000206 R12: 0000564e85e139f0 R13: 00007ffc09631da8 R14: 0000564e849bd958 R15: 0005cdcbbe878a61 ---------------- Code disassembly (best guess): 0: 3e 7a 85 jp,pt 0xffffff88 3: c0 0f 85 rorb $0x85,(%rdi) 6: ad lods %ds:(%rsi),%eax 7: 00 00 add %al,(%rax) 9: 00 65 4c add %ah,0x4c(%rbp) c: 8b 24 25 80 ef 01 00 mov 0x1ef80,%esp 13: 41 8b 94 24 8c 09 00 mov 0x98c(%r12),%edx 1a: 00 1b: 85 d2 test %edx,%edx 1d: 0f 85 94 00 00 00 jne 0xb7 23: 48 89 fd mov %rdi,%rbp 26: 41 89 f6 mov %esi,%r14d 29: 9c pushfq * 2a: 8f 04 24 popq (%rsp) <-- trapping instruction 2d: fa cli 2e: 41 8b 84 24 88 09 00 mov 0x988(%r12),%eax 35: 00 36: 31 db xor %ebx,%ebx 38: 65 ff 05 a2 c1 3e 7a incl %gs:0x7a3ec1a2(%rip) # 0x7a3ec1e1 3f: 4d rex.WRB