[    9.454643][ T2615] 8021q: adding VLAN 0 to HW filter on device bond0
[    9.458205][ T2615] eql: remember to turn off Van-Jacobson compression on your slave devices
[    9.485102][   T29] gvnic 0000:00:00.0 enp0s0: Device link is up.
[    9.489744][    T7] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready
Starting sshd: OK

syzkaller
syzkaller login: [   69.599303][   T23] cfg80211: failed to load regulatory.db
Warning: Permanently added '10.128.1.28' (ECDSA) to the list of known hosts.
executing program
[  494.899929][ T3070] nbd0: detected capacity change from 0 to 126
[  495.012429][ T3067] block nbd0: shutting down sockets
[  525.278398][   T76] block nbd0: Possible stuck request 000000003a7dc207: control (read@0,4096B). Runtime 30 seconds
[  554.969042][ T2561] udevd[2561]: worker [3069] /devices/virtual/block/nbd0 is taking a long time
[  555.358437][   T76] block nbd0: Possible stuck request 000000003a7dc207: control (read@0,4096B). Runtime 60 seconds
[  585.438435][   T76] block nbd0: Possible stuck request 000000003a7dc207: control (read@0,4096B). Runtime 90 seconds
[  615.518452][   T76] block nbd0: Possible stuck request 000000003a7dc207: control (read@0,4096B). Runtime 120 seconds
[  645.598399][   T76] block nbd0: Possible stuck request 000000003a7dc207: control (read@0,4096B). Runtime 150 seconds
[  675.112279][ T2561] udevd[2561]: worker [3069] /devices/virtual/block/nbd0 timeout; kill it
[  675.114685][ T2561] udevd[2561]: seq 6711 '/devices/virtual/block/nbd0' killed
[  675.678412][   T76] block nbd0: Possible stuck request 000000003a7dc207: control (read@0,4096B). Runtime 180 seconds
[  705.758398][   T76] block nbd0: Possible stuck request 000000003a7dc207: control (read@0,4096B). Runtime 210 seconds
[  714.718471][   T27] INFO: task syz-executor254:3067 blocked for more than 143 seconds.
[  714.720504][   T27]       Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0
[  714.722454][   T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  714.724510][   T27] task:syz-executor254 state:D stack:    0 pid: 3067 ppid:  3065 flags:0x0000000c
[  714.726704][   T27] Call trace:
[  714.727498][   T27]  __switch_to+0x180/0x298
[  714.728585][   T27]  __schedule+0x414/0x5a0
[  714.729612][   T27]  schedule+0x64/0xa4
[  714.730559][   T27]  schedule_preempt_disabled+0x18/0x2c
[  714.731852][   T27]  __mutex_lock_common+0x788/0xca8
[  714.733058][   T27]  mutex_lock_nested+0x38/0x44
[  714.734180][   T27]  blkdev_put+0x78/0x284
[  714.735172][   T27]  blkdev_close+0x24/0x38
[  714.736210][   T27]  __fput+0x198/0x3dc
[  714.737199][   T27]  ____fput+0x20/0x30
[  714.738186][   T27]  task_work_run+0xc4/0x14c
[  714.739349][   T27]  do_exit+0x26c/0xbe0
[  714.740306][   T27]  do_group_exit+0x70/0xe8
[  714.741351][   T27]  get_signal+0xb0c/0xb40
[  714.742383][   T27]  do_signal+0x128/0x438
[  714.743354][   T27]  do_notify_resume+0xc0/0x1f0
[  714.744460][   T27]  el0_svc+0x9c/0x150
[  714.745399][   T27]  el0t_64_sync_handler+0x84/0xf0
[  714.746544][   T27]  el0t_64_sync+0x18c/0x190
[  714.747666][   T27] 
[  714.747666][   T27] Showing all locks held in the system:
[  714.749576][   T27] 1 lock held by rcu_tasks_kthre/11:
[  714.750801][   T27]  #0: ffff80000d433568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450
[  714.753282][   T27] 1 lock held by rcu_tasks_trace/12:
[  714.754524][   T27]  #0: ffff80000d433bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450
[  714.757112][   T27] 1 lock held by khungtaskd/27:
[  714.758226][   T27]  #0: ffff80000d433440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48
[  714.760564][   T27] 1 lock held by klogd/2550:
[  714.761607][   T27]  #0: ffff0001fefeec58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0xa4/0x5a0
[  714.763727][   T27] 2 locks held by getty/2721:
[  714.764886][   T27]  #0: ffff0000c6943098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58
[  714.767165][   T27]  #1: ffff80000f6162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c
[  714.769649][   T27] 1 lock held by syz-executor254/3067:
[  714.770891][   T27]  #0: ffff0000c5ef9cc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x78/0x284
[  714.773208][   T27] 1 lock held by udevd/3069:
[  714.774277][   T27]  #0: ffff0000c5ef9cc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc
[  714.776606][   T27] 
[  714.777118][   T27] =============================================
[  714.777118][   T27] 
[  714.779111][   T27] Kernel panic - not syncing: hung_task: blocked tasks
[  714.780762][   T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0
[  714.783042][   T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022
[  714.785444][   T27] Call trace:
[  714.786211][   T27]  dump_backtrace+0x1c4/0x1f0
[  714.787313][   T27]  show_stack+0x2c/0x54
[  714.788267][   T27]  dump_stack_lvl+0x104/0x16c
[  714.789393][   T27]  dump_stack+0x1c/0x58
[  714.790460][   T27]  panic+0x218/0x50c
[  714.791390][   T27]  hung_task_panic+0x0/0x2c
[  714.792484][   T27]  kthread+0x12c/0x158
[  714.793521][   T27]  ret_from_fork+0x10/0x20
[  714.794581][   T27] SMP: stopping secondary CPUs
[  714.795774][   T27] Kernel Offset: disabled
[  714.796835][   T27] CPU features: 0x00000,02070084,26017203
[  714.798210][   T27] Memory Limit: none
[  714.926024][   T27] Rebooting in 86400 seconds..