team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves INFO: task syz-executor.3:32427 blocked for more than 140 seconds. Not tainted 4.14.138 #34 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.3 D27712 32427 32203 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+0x27c/0x420 kernel/sched/completion.c:144 kthread_stop+0xda/0x650 kernel/kthread.c:530 sdr_cap_stop_streaming+0x1fc/0x320 drivers/media/platform/vivid/vivid-sdr-cap.c:313 __vb2_queue_cancel+0xa3/0x890 drivers/media/v4l2-core/videobuf2-core.c:1655 vb2_core_streamoff+0x52/0x110 drivers/media/v4l2-core/videobuf2-core.c:1788 __vb2_cleanup_fileio+0x78/0x150 drivers/media/v4l2-core/videobuf2-core.c:2313 vb2_core_queue_release+0x1d/0x80 drivers/media/v4l2-core/videobuf2-core.c:2040 vb2_queue_release drivers/media/v4l2-core/videobuf2-v4l2.c:669 [inline] _vb2_fop_release+0x1cf/0x2a0 drivers/media/v4l2-core/videobuf2-v4l2.c:840 vb2_fop_release+0x75/0xc0 drivers/media/v4l2-core/videobuf2-v4l2.c:854 vivid_fop_release+0x180/0x3f0 drivers/media/platform/vivid/vivid-core.c:486 v4l2_release+0xf9/0x190 drivers/media/v4l2-core/v4l2-dev.c:446 __fput+0x275/0x7a0 fs/file_table.c:210 ____fput+0x16/0x20 fs/file_table.c:244 task_work_run+0x114/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459829 RSP: 002b:00007f53ecb89c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: 0000000000000008 RBX: 0000000000000003 RCX: 0000000000459829 RDX: 0000000000000008 RSI: 0000000020001380 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f53ecb8a6d4 R13: 00000000004c6c74 R14: 00000000004dbf68 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1013: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/6881: #0: (&f->f_pos_lock){+.+.}, at: [] __fdget_pos+0xab/0xd0 fs/file.c:769 2 locks held by getty/7003: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7005: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7006: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7007: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7008: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7009: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1e6/0x17b0 drivers/tty/n_tty.c:2156 2 locks held by getty/7010: #0: (&tty->ldisc_sem){++++}, at: [] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:377 #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: 1013 Comm: khungtaskd Not tainted 4.14.138 #34 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+0x138/0x19c 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: 6879 Comm: rs:main Q:Reg Not tainted 4.14.138 #34 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8880915f6380 task.stack: ffff88808a910000 RIP: 0010:elv_rb_add+0x182/0x200 block/elevator.c:348 RSP: 0018:ffff88808a917418 EFLAGS: 00000292 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff110147d9b21 RDX: 1ffff110143c3dd1 RSI: ffff8880a3ecd908 RDI: ffff8880a1e1ee88 RBP: ffff88808a917448 R08: 0000000000003008 R09: ffffffff88c97480 R10: ffff8880915f6c78 R11: ffff8880915f6380 R12: ffff8880a1e1ee88 R13: ffff8880a1e1ee00 R14: 0000000000000001 R15: ffff8880a3ecd908 FS: 00007f875ff0d700(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd7f64b360 CR3: 0000000095fd4000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: deadline_add_rq_rb block/mq-deadline.c:90 [inline] dd_insert_request block/mq-deadline.c:409 [inline] dd_insert_requests+0x385/0x840 block/mq-deadline.c:437 blk_mq_sched_insert_request+0x332/0x5a0 block/blk-mq-sched.c:378 blk_mq_make_request+0x52e/0x1c10 block/blk-mq.c:1750 generic_make_request block/blk-core.c:2227 [inline] generic_make_request+0x205/0xa40 block/blk-core.c:2171 submit_bio+0x1a5/0x3f0 block/blk-core.c:2301 submit_bh_wbc+0x550/0x720 fs/buffer.c:3152 submit_bh fs/buffer.c:3158 [inline] __sync_dirty_buffer fs/buffer.c:3244 [inline] __sync_dirty_buffer+0xcf/0x260 fs/buffer.c:3235 sync_dirty_buffer+0x1b/0x20 fs/buffer.c:3257 ext4_write_inode+0x3c2/0x450 fs/ext4/inode.c:5264 write_inode fs/fs-writeback.c:1224 [inline] __writeback_single_inode+0xb44/0x1120 fs/fs-writeback.c:1423 writeback_single_inode+0x1fa/0x380 fs/fs-writeback.c:1477 sync_inode fs/fs-writeback.c:2505 [inline] sync_inode_metadata+0x8c/0xb0 fs/fs-writeback.c:2525 __generic_file_fsync+0x130/0x1a0 fs/libfs.c:988 ext4_sync_file+0x755/0x12d0 fs/ext4/fsync.c:120 vfs_fsync_range+0x10e/0x260 fs/sync.c:196 generic_write_sync include/linux/fs.h:2677 [inline] ext4_file_write_iter+0x68a/0xe90 fs/ext4/file.c:279 call_write_iter include/linux/fs.h:1777 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x4a7/0x6b0 fs/read_write.c:482 vfs_write+0x198/0x500 fs/read_write.c:544 SYSC_write fs/read_write.c:590 [inline] SyS_write+0xfd/0x230 fs/read_write.c:582 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f876196b19d RSP: 002b:00007f875ff0bf90 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000400 RCX: 00007f876196b19d RDX: 0000000000000400 RSI: 000000000128da90 RDI: 0000000000000005 RBP: 000000000128da90 R08: 6c656e72656b2072 R09: 35343131205b203a R10: 5d3037363631332e R11: 0000000000000293 R12: 0000000000000000 R13: 00007f875ff0c410 R14: 00007f8758006450 R15: 000000000128d890 Code: 00 fc ff df 4c 89 f9 49 c7 85 98 00 00 00 00 00 00 00 48 c1 e9 03 80 3c 11 00 75 43 48 8b 75 d0 4d 89 27 4c 89 e7 e8 8e 6b 53 03 <48> 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 9a 4e 98 fe 4c