[ 9.290837][ T2615] 8021q: adding VLAN 0 to HW filter on device bond0 [ 9.294317][ T2615] eql: remember to turn off Van-Jacobson compression on your slave devices [ 9.319939][ T49] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 9.321891][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller syzkaller login: [ 69.612030][ T23] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.170' (ECDSA) to the list of known hosts. executing program [ 494.462502][ T3069] nbd0: detected capacity change from 0 to 10 [ 494.574398][ T3066] block nbd0: shutting down sockets [ 524.651576][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 30 seconds [ 554.528773][ T2561] udevd[2561]: worker [3068] /devices/virtual/block/nbd0 is taking a long time [ 554.731257][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 60 seconds [ 584.811207][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 90 seconds [ 614.891224][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 120 seconds [ 644.971208][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 150 seconds [ 674.664673][ T2561] udevd[2561]: worker [3068] /devices/virtual/block/nbd0 timeout; kill it [ 674.667112][ T2561] udevd[2561]: seq 6711 '/devices/virtual/block/nbd0' killed [ 674.667173][ T3068] ldm_validate_partition_table(): Disk read failed. [ 674.670737][ T3068] Dev nbd0: unable to read RDB block 0 [ 674.672133][ T3068] nbd0: unable to read partition table [ 674.673369][ T3068] nbd0: partition table beyond EOD, truncated executing program [ 674.677586][ T2561] udevd[2561]: worker [3068] terminated by signal 9 (Killed) [ 674.679588][ T2561] udevd[2561]: worker [3068] failed while handling '/devices/virtual/block/nbd0' [ 675.051204][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 180 seconds [ 705.131206][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 210 seconds [ 735.211209][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 240 seconds [ 765.291235][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 270 seconds [ 795.371211][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 300 seconds [ 825.451262][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 330 seconds [ 855.531214][ T76] block nbd0: Possible stuck request 00000000c6934806: control (read@0,4096B). Runtime 360 seconds [ 858.091298][ T27] INFO: task syz-executor384:3078 blocked for more than 143 seconds. [ 858.093358][ T27] Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 [ 858.095185][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.097192][ T27] task:syz-executor384 state:D stack: 0 pid: 3078 ppid: 3064 flags:0x00000001 [ 858.099288][ T27] Call trace: [ 858.099925][ T27] __switch_to+0x180/0x298 [ 858.100791][ T27] __schedule+0x414/0x5a0 [ 858.101797][ T27] schedule+0x64/0xa4 [ 858.102808][ T27] blk_mq_freeze_queue_wait+0x94/0xf4 [ 858.104280][ T27] blk_freeze_queue+0x94/0xa8 [ 858.105357][ T27] blk_mq_freeze_queue+0x20/0x30 [ 858.106547][ T27] nbd_add_socket+0x78/0x27c [ 858.107599][ T27] __nbd_ioctl+0x80/0x334 [ 858.108645][ T27] nbd_ioctl+0xec/0x13c [ 858.109616][ T27] blkdev_ioctl+0x24c/0x6d8 [ 858.110657][ T27] __arm64_sys_ioctl+0xd0/0x140 [ 858.111858][ T27] el0_svc_common+0x138/0x220 [ 858.112997][ T27] do_el0_svc+0x48/0x164 [ 858.113984][ T27] el0_svc+0x58/0x150 [ 858.114950][ T27] el0t_64_sync_handler+0x84/0xf0 [ 858.116172][ T27] el0t_64_sync+0x18c/0x190 [ 858.117195][ T27] INFO: task syz-executor384:3079 blocked for more than 143 seconds. [ 858.119072][ T27] Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 [ 858.120874][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.123020][ T27] task:syz-executor384 state:D stack: 0 pid: 3079 ppid: 3064 flags:0x00000001 [ 858.125207][ T27] Call trace: [ 858.125965][ T27] __switch_to+0x180/0x298 [ 858.127034][ T27] __schedule+0x414/0x5a0 [ 858.128136][ T27] schedule+0x64/0xa4 [ 858.129065][ T27] schedule_preempt_disabled+0x18/0x2c [ 858.130407][ T27] __mutex_lock_common+0x788/0xca8 [ 858.131712][ T27] mutex_lock_nested+0x38/0x44 [ 858.132864][ T27] nbd_ioctl+0x70/0x13c [ 858.133871][ T27] blkdev_ioctl+0x24c/0x6d8 [ 858.135093][ T27] __arm64_sys_ioctl+0xd0/0x140 [ 858.136264][ T27] el0_svc_common+0x138/0x220 [ 858.137376][ T27] do_el0_svc+0x48/0x164 [ 858.138402][ T27] el0_svc+0x58/0x150 [ 858.139255][ T27] el0t_64_sync_handler+0x84/0xf0 [ 858.140448][ T27] el0t_64_sync+0x18c/0x190 [ 858.141584][ T27] INFO: task syz-executor384:3080 blocked for more than 143 seconds. [ 858.143470][ T27] Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 [ 858.145215][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.147276][ T27] task:syz-executor384 state:D stack: 0 pid: 3080 ppid: 3064 flags:0x00000001 [ 858.149705][ T27] Call trace: [ 858.150463][ T27] __switch_to+0x180/0x298 [ 858.151610][ T27] __schedule+0x414/0x5a0 [ 858.152457][ T27] schedule+0x64/0xa4 [ 858.153224][ T27] schedule_preempt_disabled+0x18/0x2c [ 858.154280][ T27] __mutex_lock_common+0x788/0xca8 [ 858.155539][ T27] mutex_lock_nested+0x38/0x44 [ 858.156698][ T27] nbd_ioctl+0x70/0x13c [ 858.157696][ T27] blkdev_ioctl+0x24c/0x6d8 [ 858.158808][ T27] __arm64_sys_ioctl+0xd0/0x140 [ 858.159953][ T27] el0_svc_common+0x138/0x220 [ 858.161077][ T27] do_el0_svc+0x48/0x164 [ 858.162128][ T27] el0_svc+0x58/0x150 [ 858.163052][ T27] el0t_64_sync_handler+0x84/0xf0 [ 858.164239][ T27] el0t_64_sync+0x18c/0x190 [ 858.165361][ T27] [ 858.165361][ T27] Showing all locks held in the system: [ 858.167212][ T27] 1 lock held by rcu_tasks_kthre/11: [ 858.168449][ T27] #0: ffff80000d433568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 858.171022][ T27] 1 lock held by rcu_tasks_trace/12: [ 858.172345][ T27] #0: ffff80000d433bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 858.175026][ T27] 1 lock held by khungtaskd/27: [ 858.176178][ T27] #0: ffff80000d433440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 [ 858.178455][ T27] 2 locks held by getty/2714: [ 858.179611][ T27] #0: ffff0000c716b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 [ 858.182182][ T27] #1: ffff80000f6162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c [ 858.184562][ T27] 1 lock held by syz-executor384/3078: [ 858.185830][ T27] #0: ffff0000c5a7a998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c [ 858.188028][ T27] 1 lock held by syz-executor384/3079: [ 858.189526][ T27] #0: ffff0000c5a7a998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c [ 858.191761][ T27] 1 lock held by syz-executor384/3080: [ 858.193058][ T27] #0: ffff0000c5a7a998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c [ 858.195252][ T27] [ 858.195802][ T27] ============================================= [ 858.195802][ T27] [ 858.197866][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 858.199543][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 [ 858.201485][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 [ 858.203701][ T27] Call trace: [ 858.204463][ T27] dump_backtrace+0x1c4/0x1f0 [ 858.205563][ T27] show_stack+0x2c/0x54 [ 858.206484][ T27] dump_stack_lvl+0x104/0x16c [ 858.207553][ T27] dump_stack+0x1c/0x58 [ 858.208643][ T27] panic+0x218/0x50c [ 858.209568][ T27] hung_task_panic+0x0/0x2c [ 858.210653][ T27] kthread+0x12c/0x158 [ 858.211587][ T27] ret_from_fork+0x10/0x20 [ 858.212690][ T27] SMP: stopping secondary CPUs [ 858.213882][ T27] Kernel Offset: disabled [ 858.214916][ T27] CPU features: 0x00000,02070084,26017203 [ 858.216273][ T27] Memory Limit: none [ 858.365201][ T27] Rebooting in 86400 seconds..