8021q: adding VLAN 0 to HW filter on device team0 IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 8021q: adding VLAN 0 to HW filter on device team0 INFO: task syz-executor0:6948 blocked for more than 140 seconds. Not tainted 4.11.0-rc5+ #1 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D28808 6948 5271 0x00000004 Call Trace: context_switch kernel/sched/core.c:2878 [inline] __schedule+0x935/0x1eb0 kernel/sched/core.c:3439 schedule+0x92/0x1b0 kernel/sched/core.c:3499 schedule_timeout+0x580/0xc30 kernel/time/timer.c:1688 do_wait_for_common kernel/sched/completion.c:77 [inline] __wait_for_common kernel/sched/completion.c:96 [inline] wait_for_common kernel/sched/completion.c:104 [inline] wait_for_completion+0x26b/0x3f0 kernel/sched/completion.c:125 kthread_stop+0xc2/0x610 kernel/kthread.c:521 vivid_stop_generating_vid_cap+0x195/0x6c0 drivers/media/platform/vivid/vivid-kthread-cap.c:931 vid_cap_stop_streaming+0x71/0xe0 drivers/media/platform/vivid/vivid-vid-cap.c:273 __vb2_queue_cancel+0x99/0x6e0 drivers/media/v4l2-core/videobuf2-core.c:1645 vb2_core_streamoff+0x62/0x140 drivers/media/v4l2-core/videobuf2-core.c:1769 __vb2_cleanup_fileio+0x69/0x150 drivers/media/v4l2-core/videobuf2-core.c:2283 vb2_core_queue_release+0xf/0x70 drivers/media/v4l2-core/videobuf2-core.c:2010 vb2_queue_release drivers/media/v4l2-core/videobuf2-v4l2.c:670 [inline] _vb2_fop_release+0x1af/0x260 drivers/media/v4l2-core/videobuf2-v4l2.c:841 vb2_fop_release+0x6a/0xd0 drivers/media/v4l2-core/videobuf2-v4l2.c:855 vivid_fop_release+0x163/0x400 drivers/media/platform/vivid/vivid-core.c:486 v4l2_release+0xeb/0x210 drivers/media/v4l2-core/v4l2-dev.c:446 __fput+0x25c/0x730 fs/file_table.c:209 ____fput+0x9/0x10 fs/file_table.c:245 task_work_run+0xd9/0x150 kernel/task_work.c:116 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x185/0x1c0 arch/x86/entry/common.c:161 prepare_exit_to_usermode arch/x86/entry/common.c:191 [inline] syscall_return_slowpath+0x24f/0x2d0 arch/x86/entry/common.c:260 entry_SYSCALL_64_fastpath+0xc4/0xc6 RIP: 0033:0x410501 RSP: 002b:00007ffc8ff38740 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000410501 RDX: 0000000000000000 RSI: 0000000000720128 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000000 R09: 00007ffc8ff38660 R10: 00007ffc8ff38660 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 2 locks held by khungtaskd/954: #0: (rcu_read_lock){......}, at: [] check_hung_uninterruptible_tasks kernel/hung_task.c:172 [inline] #0: (rcu_read_lock){......}, at: [] watchdog+0x109/0x9e0 kernel/hung_task.c:243 #1: (tasklist_lock){.+.+..}, at: [] debug_show_all_locks+0x70/0x280 kernel/locking/lockdep.c:4342 1 lock held by rsyslogd/5007: #0: (&f->f_pos_lock){+.+.+.}, at: [] __fdget_pos+0x84/0xb0 fs/file.c:781 2 locks held by getty/5098: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 drivers/tty/n_tty.c:2133 2 locks held by getty/5099: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 drivers/tty/n_tty.c:2133 2 locks held by getty/5100: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 drivers/tty/n_tty.c:2133 2 locks held by getty/5101: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 drivers/tty/n_tty.c:2133 2 locks held by getty/5102: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 drivers/tty/n_tty.c:2133 2 locks held by getty/5103: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 drivers/tty/n_tty.c:2133 2 locks held by getty/5104: #0: (&tty->ldisc_sem){++++++}, at: [] ldsem_down_read+0x2d/0x40 drivers/tty/tty_ldsem.c:367 #1: (&ldata->atomic_read_lock){+.+...}, at: [] n_tty_read+0x1d1/0x1660 drivers/tty/n_tty.c:2133 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 954 Comm: khungtaskd Not tainted 4.11.0-rc5+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0xe6/0x120 lib/dump_stack.c:52 nmi_cpu_backtrace+0x137/0x160 lib/nmi_backtrace.c:100 nmi_trigger_cpumask_backtrace+0xf8/0x1a0 lib/nmi_backtrace.c:61 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37 trigger_all_cpu_backtrace include/linux/nmi.h:95 [inline] check_hung_task kernel/hung_task.c:129 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:186 [inline] watchdog+0x62d/0x9e0 kernel/hung_task.c:243 kthread+0x2c9/0x3d0 kernel/kthread.c:229 ret_from_fork+0x31/0x40 arch/x86/entry/entry_64.S:430 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5004 Comm: rs:main Q:Reg Not tainted 4.11.0-rc5+ #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 task: ffff880068f4a000 task.stack: ffff88005e9b0000 RIP: 0033:0x43912a RSP: 002b:00007f10df1db510 EFLAGS: 00000246 RAX: 0000000002226d50 RBX: 0000000002216a38 RCX: 000000002b3508bc RDX: 00000000000b0f9f RSI: 0000000000000000 RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000006 R09: 000000000223ac40 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f10df1dc700(0000) GS:ffff88006c700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f89bdd26190 CR3: 0000000065997000 CR4: 00000000007406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554