DUID 00:04:ac:03:58:10:d0:76:5c:28:30:a7:8a:8b:4a:a3:06:e2
forked to background, child pid 3172
[   30.346046][ T3173] 8021q: adding VLAN 0 to HW filter on device bond0
[   30.357794][ T3173] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK

syzkaller
syzkaller login: [   81.405212][ T1151] cfg80211: failed to load regulatory.db
Warning: Permanently added '10.128.0.94' (ECDSA) to the list of known hosts.
executing program
executing program
[  491.432545][ T3630] block nbd0: shutting down sockets
[  521.722971][ T1009] block nbd0: Possible stuck request ffff888019dac000: control (flush@18446744073709551104,0B). Runtime 30 seconds
[  716.282919][   T26] INFO: task syz-executor157:3633 can't die for more than 143 seconds.
[  716.291455][   T26] task:syz-executor157 state:D stack:28120 pid: 3633 ppid:  3629 flags:0x00004004
[  716.300847][   T26] Call Trace:
[  716.304183][   T26]  <TASK>
[  716.307126][   T26]  __schedule+0xab2/0x4db0
[  716.311641][   T26]  ? lockdep_hardirqs_on+0x79/0x100
[  716.316932][   T26]  ? io_schedule_timeout+0x140/0x140
[  716.322234][   T26]  ? debug_object_destroy+0x210/0x210
[  716.327736][   T26]  schedule+0xd2/0x1f0
[  716.331831][   T26]  schedule_timeout+0x14a/0x2a0
[  716.336874][   T26]  ? usleep_range_state+0x1b0/0x1b0
[  716.342109][   T26]  ? destroy_timer_on_stack+0x20/0x20
[  716.347814][   T26]  ? 0xffffffff81000000
[  716.351978][   T26]  ? rwlock_bug.part.0+0x90/0x90
[  716.357055][   T26]  io_schedule_timeout+0xcb/0x140
[  716.362096][   T26]  wait_for_completion_io_timeout+0x16f/0x280
[  716.368216][   T26]  ? wait_for_completion_killable_timeout+0x320/0x320
[  716.375190][   T26]  ? submit_bio+0x1ef/0x430
[  716.379875][   T26]  ? lockdep_init_map_type+0x2c3/0x7b0
[  716.385560][   T26]  submit_bio_wait+0x158/0x230
[  716.390549][   T26]  ? submit_bio_wait_endio+0x40/0x40
[  716.395944][   T26]  ? lock_downgrade+0x6e0/0x6e0
[  716.400876][   T26]  blkdev_issue_flush+0x95/0xd0
[  716.405929][   T26]  ? blk_unregister_queue+0x280/0x280
[  716.411438][   T26]  ? bio_devname+0x40/0x40
[  716.416094][   T26]  blkdev_fsync+0x68/0xa0
[  716.420454][   T26]  ? blkdev_fallocate+0x420/0x420
[  716.425560][   T26]  __x64_sys_fdatasync+0xc5/0x140
[  716.430677][   T26]  do_syscall_64+0x35/0xb0
[  716.435602][   T26]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[  716.441609][   T26] RIP: 0033:0x7fcb854986d9
[  716.446081][   T26] RSP: 002b:00007ffd575ac058 EFLAGS: 00000246 ORIG_RAX: 000000000000004b
[  716.454618][   T26] RAX: ffffffffffffffda RBX: 0000000000076c12 RCX: 00007fcb854986d9
[  716.462633][   T26] RDX: 00007fcb854986d9 RSI: 0000000000000005 RDI: 0000000000000003
[  716.470677][   T26] RBP: 0000000000000000 R08: 00007ffd575ac1f8 R09: 00007ffd575ac1f8
[  716.478732][   T26] R10: 00007ffd575ac1f8 R11: 0000000000000246 R12: 00007ffd575ac06c
[  716.486740][   T26] R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
[  716.494865][   T26]  </TASK>
[  716.497898][   T26] 
[  716.497898][   T26] Showing all locks held in the system:
[  716.505667][   T26] 1 lock held by khungtaskd/26:
[  716.510535][   T26]  #0: ffffffff8bb83a60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260
[  716.520516][   T26] 2 locks held by getty/3275:
[  716.525212][   T26]  #0: ffff88807f051098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80
[  716.535178][   T26]  #1: ffffc90002b662e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230
[  716.545347][   T26] 
[  716.547675][   T26] =============================================
[  716.547675][   T26] 
[  716.556149][   T26] Kernel panic - not syncing: hung_task: blocked tasks
[  716.563471][   T26] CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc2-next-20220204-syzkaller #0
[  716.572862][   T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  716.582913][   T26] Call Trace:
[  716.586183][   T26]  <TASK>
[  716.589105][   T26]  dump_stack_lvl+0xcd/0x134
[  716.593774][   T26]  panic+0x2b0/0x605
[  716.597758][   T26]  ? __warn_printk+0xf3/0xf3
[  716.602363][   T26]  ? watchdog.cold+0x1b9/0x1de
[  716.607169][   T26]  watchdog.cold+0x1ca/0x1de
[  716.611781][   T26]  ? trace_sched_process_hang+0x280/0x280
[  716.617825][   T26]  kthread+0x2e9/0x3a0
[  716.621954][   T26]  ? kthread_complete_and_exit+0x40/0x40
[  716.627598][   T26]  ret_from_fork+0x1f/0x30
[  716.632055][   T26]  </TASK>
[  716.635384][   T26] Kernel Offset: disabled
[  716.639706][   T26] Rebooting in 86400 seconds..