INFO: task kworker/0:2:4680 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. orangefs_mount: mount request failed with -4 kworker/0:2 D26144 4680 2 0x80000000 FAT-fs (loop5): bread failed, FSINFO block (sector = 1) Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 orangefs_mount: mount request failed with -4 usb_kill_urb.part.0+0x197/0x220 drivers/usb/core/urb.c:697 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) usb_kill_urb+0x7c/0x90 drivers/usb/core/urb.c:692 FAT-fs (loop5): bread failed, FSINFO block (sector = 1) usb_start_wait_urb+0x252/0x4c0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:101 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:152 FAT-fs (loop5): bread failed, FSINFO block (sector = 1) usb_get_descriptor+0xc5/0x1b0 drivers/usb/core/message.c:654 usb_get_device_descriptor+0x81/0xf0 drivers/usb/core/message.c:926 hub_port_init+0x74b/0x3120 drivers/usb/core/hub.c:4799 hub_port_connect drivers/usb/core/hub.c:5070 [inline] hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] port_event drivers/usb/core/hub.c:5361 [inline] hub_event+0x1ccd/0x44a0 drivers/usb/core/hub.c:5441 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 orangefs_mount: mount request failed with -4 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Showing all locks held in the system: 1 lock held by khungtaskd/1562: #0: 000000007a1dde96 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 5 locks held by kworker/0:2/4680: #0: 00000000de806ae3 ((wq_completion)"usb_hub_wq"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 00000000e1ee519a ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 #2: 0000000098fa89a5 (&dev->mutex){....}, at: device_lock include/linux/device.h:1174 [inline] #2: 0000000098fa89a5 (&dev->mutex){....}, at: hub_event+0x11e/0x44a0 drivers/usb/core/hub.c:5387 FAT-fs (loop4): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) FAT-fs (loop5): bread failed, FSINFO block (sector = 1) #3: 0000000067edcd44 (&port_dev->status_lock){+.+.}, at: usb_lock_port drivers/usb/core/hub.c:2983 [inline] #3: 0000000067edcd44 (&port_dev->status_lock){+.+.}, at: hub_port_connect drivers/usb/core/hub.c:5069 [inline] #3: 0000000067edcd44 (&port_dev->status_lock){+.+.}, at: hub_port_connect_change drivers/usb/core/hub.c:5253 [inline] #3: 0000000067edcd44 (&port_dev->status_lock){+.+.}, at: port_event drivers/usb/core/hub.c:5361 [inline] #3: 0000000067edcd44 (&port_dev->status_lock){+.+.}, at: hub_event+0x1cb8/0x44a0 drivers/usb/core/hub.c:5441 #4: 0000000023abbbb3 (hcd->address0_mutex){+.+.}, at: hub_port_init+0x1b9/0x3120 drivers/usb/core/hub.c:4578 1 lock held by in:imklog/7780: #0: 00000000ca69e581 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 FAT-fs (loop5): bread failed, FSINFO block (sector = 1) 1 lock held by syz-executor.4/8137: #0: 00000000ff4a04e8 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline] #0: 00000000ff4a04e8 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667 2 locks held by kworker/0:1/380: #0: 00000000fc68fcce ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124 #1: 0000000051b5f680 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128 1 lock held by syz-executor.3/5619: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1562 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5619 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:23 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:67 [inline] RIP: 0010:write_comp_data+0xf/0x70 kernel/kcov.c:122 Code: 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 0f 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df 01 00 <65> 8b 05 7a 59 9f 7e a9 00 01 1f 00 75 4f 8b 86 60 13 00 00 83 f8 RSP: 0018:ffff8880ba007f50 EFLAGS: 00000046 RAX: ffff8880967464c0 RBX: 0000000000010002 RCX: ffffffff83771e23 RDX: 0000000000010002 RSI: ffff8880967464c0 RDI: 0000000000000005 RBP: ffffffff88b3e120 R08: ffffffff8c665018 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66501b R12: 0000000000000000 R13: ffffffff88b3e0e0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fde3887b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fd22000 CR3: 00000000a9485000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x33/0x280 lib/smp_processor_id.c:15 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:348 [inline] rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:1025 rcu_read_lock_sched_held+0xc6/0x1d0 kernel/rcu/update.c:113 trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:56 [inline] smp_apic_timer_interrupt+0x3ca/0x550 arch/x86/kernel/apic/apic.c:1097 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:preempt_count_add+0x3b/0x190 kernel/sched/core.c:3230 Code: 60 37 24 8d 48 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2a 01 00 00 8b 0d 05 c9 e2 0b <85> c9 75 07 65 8b 05 ea 70 c0 7e 48 b8 00 00 00 00 00 fc ff df 48 RSP: 0018:ffff8880a05dfd48 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: ffffffff8d243760 RCX: 0000000000000000 RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000001 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffed101740455a R10: ffff8880ba022ad3 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffffff89f18298 R14: dffffc0000000000 R15: ffff8880b42ae480 rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1076 [inline] rcu_lockdep_current_cpu_online+0x32/0x1b0 kernel/rcu/tree.c:1068 rcu_read_lock_held+0xc3/0x110 kernel/rcu/update.c:285 fcheck_files include/linux/fdtable.h:95 [inline] __fget+0x3ab/0x510 fs/file.c:687 __fget_light fs/file.c:742 [inline] __fdget+0x1ba/0x230 fs/file.c:750 fdget include/linux/file.h:60 [inline] ksys_pwrite64 fs/read_write.c:649 [inline] __do_sys_pwrite64 fs/read_write.c:663 [inline] __se_sys_pwrite64 fs/read_write.c:660 [inline] __x64_sys_pwrite64+0x10f/0x250 fs/read_write.c:660 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fde39eb91d7 Code: 08 89 3c 24 48 89 4c 24 18 e8 e5 f8 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 12 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 15 f9 ff ff 48 8b RSP: 002b:00007fde3887af00 EFLAGS: 00000293 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007fde39f4fa20 RCX: 00007fde39eb91d7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000edc000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000005 R13: 0000000000000005 R14: 000000002000c480 R15: 00000000000007f8 orangefs_mount: mount request failed with -4 FAT-fs (loop5): bread failed, FSINFO block (sector = 1)