protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 INFO: task syz-executor.4:10936 blocked for more than 140 seconds. Not tainted 4.14.141 #37 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D27776 10936 6958 0x00000004 Call Trace: context_switch kernel/sched/core.c:2807 [inline] __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3383 schedule+0x92/0x1c0 kernel/sched/core.c:3427 schedule_timeout+0x93b/0xe10 kernel/time/timer.c:1721 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion_timeout+0x297/0x460 kernel/sched/completion.c:163 usb_start_wait_urb+0x151/0x290 drivers/usb/core/message.c:61 usb_bulk_msg+0x1f8/0x500 drivers/usb/core/message.c:252 proc_bulk+0x3b1/0x6c0 drivers/usb/core/devio.c:1210 usbdev_do_ioctl+0x5a2/0x2a60 drivers/usb/core/devio.c:2436 usbdev_ioctl+0x26/0x30 drivers/usb/core/devio.c:2586 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459879 RSP: 002b:00007f1a1fbebc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879 RDX: 0000000020000200 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1a1fbec6d4 R13: 00000000004c1fa8 R14: 00000000004d53b0 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1012: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/6787: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xab/0xd0 fs/file.c:769 2 locks held by getty/6909: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6910: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6911: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6912: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6913: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6914: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/6915: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1012 Comm: khungtaskd Not tainted 4.14.141 #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x197 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x57/0x94 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x141/0x189 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x5e7/0xb90 kernel/hung_task.c:274 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.141 #37 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffffffff87676240 task.stack: ffffffff87600000 RIP: 0010:mark_irqflags kernel/locking/lockdep.c:3065 [inline] RIP: 0010:__lock_acquire+0x1171/0x4620 kernel/locking/lockdep.c:3444 RSP: 0018:ffff8880aee07350 EFLAGS: 00000046 RAX: 000000000000000c RBX: 0000000000000042 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff87676b38 RDI: ffffffff87676240 RBP: ffff8880aee07500 R08: 0000000000000001 R09: 00000000000c422a R10: ffffffff87676b38 R11: ffffffff87676240 R12: ffff8880a8f5f468 R13: 000000000000022a R14: 0000000000000003 R15: ffffffff87676b5a FS: 0000000000000000(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1b4cf74000 CR3: 000000009b47a000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x16f/0x430 kernel/locking/lockdep.c:3991 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x95/0xcd kernel/locking/spinlock.c:160 delayacct_end+0x6a/0xf0 kernel/delayacct.c:61 __delayacct_blkio_end+0x8a/0xc0 kernel/delayacct.c:91 delayacct_blkio_end include/linux/delayacct.h:128 [inline] try_to_wake_up+0x9d6/0xf90 kernel/sched/core.c:2067 default_wake_function+0x30/0x50 kernel/sched/core.c:3621 autoremove_wake_function+0x19/0x160 kernel/sched/wait.c:377 wake_page_function+0x13f/0x1a0 mm/filemap.c:934 __wake_up_common+0x10b/0x5a0 kernel/sched/wait.c:97 __wake_up_locked_key_bookmark+0x16/0x20 kernel/sched/wait.c:171 wake_up_page_bit+0x119/0x260 mm/filemap.c:954 wake_up_page mm/filemap.c:995 [inline] end_page_writeback+0x166/0x220 mm/filemap.c:1156 ext4_finish_bio+0x47a/0x6d0 fs/ext4/page-io.c:118 ext4_end_bio+0x156/0x6b0 fs/ext4/page-io.c:342 bio_endio+0x336/0x690 block/bio.c:1918 req_bio_endio block/blk-core.c:204 [inline] blk_update_request+0x292/0xa10 block/blk-core.c:2763 scsi_end_request+0x82/0xa10 drivers/scsi/scsi_lib.c:659 scsi_io_completion+0xaaa/0x1630 drivers/scsi/scsi_lib.c:885 scsi_finish_command+0x3d0/0x5a0 drivers/scsi/scsi.c:248 scsi_softirq_done+0x2d3/0x370 drivers/scsi/scsi_lib.c:1671 __blk_mq_complete_request+0x31c/0x6e0 block/blk-mq.c:571 blk_mq_complete_request+0x5d/0x70 block/blk-mq.c:591 scsi_mq_done+0x7c/0x2e0 drivers/scsi/scsi_lib.c:1979 virtscsi_complete_cmd+0x532/0x700 drivers/scsi/virtio_scsi.c:207 virtscsi_vq_done+0xa8/0x130 drivers/scsi/virtio_scsi.c:223 virtscsi_req_done+0xa4/0xd0 drivers/scsi/virtio_scsi.c:238 vring_interrupt+0x10f/0x160 drivers/virtio/virtio_ring.c:951 __handle_irq_event_percpu+0x125/0x7f0 kernel/irq/handle.c:147 handle_irq_event_percpu+0x65/0x130 kernel/irq/handle.c:187 handle_irq_event+0xa7/0x134 kernel/irq/handle.c:204 handle_edge_irq+0x22b/0x840 kernel/irq/chip.c:770 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x39/0x50 arch/x86/kernel/irq_64.c:87 do_IRQ+0x99/0x1d0 arch/x86/kernel/irq.c:230 common_interrupt+0x96/0x96 arch/x86/entry/entry_64.S:576 RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61 RSP: 0018:ffffffff87607de8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff8e RAX: 1ffffffff0ee2a84 RBX: ffffffff87676240 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff87676abc RBP: ffffffff87607e10 R08: 1ffffffff104a601 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87715410 R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87676240 arch_cpu_idle+0xa/0x10 arch/x86/kernel/process.c:557 default_idle_call+0x36/0x90 kernel/sched/idle.c:98 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x262/0x3d0 kernel/sched/idle.c:246 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:351 rest_init+0x1d9/0x1e2 init/main.c:435 start_kernel+0x6df/0x6fd init/main.c:709 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:381 x86_64_start_kernel+0x77/0x7b arch/x86/kernel/head64.c:362 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 Code: 89 27 00 00 44 8b 25 6f 57 dd 07 45 85 e4 0f 85 12 f0 ff ff e9 15 9b 00 00 31 d2 4c 89 d6 4c 89 df 4c 89 54 24 70 4c 89 5c 24 78 aa d5 ff ff 4c 8b 5c 24 78 85 c0 4c 8b 54 24 70 0f 85 a6 f9