[ 10.019009][ T2658] 8021q: adding VLAN 0 to HW filter on device bond0 [ 10.022571][ T2658] eql: remember to turn off Van-Jacobson compression on your slave devices [ 10.050888][ T39] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 10.056041][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller syzkaller login: [ 69.620936][ T2199] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.123' (ECDSA) to the list of known hosts. executing program [ 497.394313][ T3108] block nbd0: shutting down sockets [ 714.740007][ T27] INFO: task syz-executor270:3108 blocked for more than 143 seconds. [ 714.741919][ T27] Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 [ 714.743558][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 714.745438][ T27] task:syz-executor270 state:D stack:0 pid:3108 ppid:3107 flags:0x00000009 [ 714.747679][ T27] Call trace: [ 714.748443][ T27] __switch_to+0x180/0x298 [ 714.749384][ T27] __schedule+0x408/0x594 [ 714.750390][ T27] schedule+0x64/0xa4 [ 714.751281][ T27] schedule_timeout+0x64/0x1b4 [ 714.752317][ T27] do_wait_for_common+0xf4/0x184 [ 714.753397][ T27] wait_for_completion+0x48/0x60 [ 714.754435][ T27] __flush_workqueue+0x2b0/0x6dc [ 714.755455][ T27] nbd_start_device_ioctl+0x1e4/0x2b8 [ 714.756610][ T27] __nbd_ioctl+0x16c/0x334 [ 714.757585][ T27] nbd_ioctl+0xec/0x13c [ 714.758448][ T27] blkdev_ioctl+0x24c/0x6d8 [ 714.759383][ T27] __arm64_sys_ioctl+0xd0/0x140 [ 714.760551][ T27] el0_svc_common+0x138/0x220 [ 714.761658][ T27] do_el0_svc+0x48/0x140 [ 714.762619][ T27] el0_svc+0x58/0x150 [ 714.763509][ T27] el0t_64_sync_handler+0x84/0xf0 [ 714.764595][ T27] el0t_64_sync+0x190/0x194 [ 714.765595][ T27] [ 714.765595][ T27] Showing all locks held in the system: [ 714.767336][ T27] 1 lock held by rcu_tasks_kthre/11: [ 714.768393][ T27] #0: ffff80000d4a4768 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 714.774433][ T27] 1 lock held by rcu_tasks_trace/12: [ 714.775747][ T27] #0: ffff80000d4a4db8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 714.778036][ T27] 1 lock held by khungtaskd/27: [ 714.779090][ T27] #0: ffff80000d4a4640 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 [ 714.781303][ T27] 2 locks held by kworker/u5:0/46: [ 714.782195][ T27] #0: ffff0000c6236d38 ((wq_completion)nbd0-recv){+.+.}-{0:0}, at: process_one_work+0x270/0x504 [ 714.784664][ T27] #1: ffff80000f703d80 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x29c/0x504 [ 714.787556][ T27] 2 locks held by getty/2759: [ 714.788581][ T27] #0: ffff0000c8153898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 [ 714.790840][ T27] #1: ffff80000f6be2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c [ 714.793010][ T27] [ 714.793507][ T27] ============================================= [ 714.793507][ T27] [ 714.795334][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 714.796870][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 [ 714.799075][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 [ 714.801374][ T27] Call trace: [ 714.802113][ T27] dump_backtrace+0x1c4/0x1f0 [ 714.803141][ T27] show_stack+0x2c/0x3c [ 714.804126][ T27] dump_stack_lvl+0x104/0x16c [ 714.805318][ T27] dump_stack+0x1c/0x58 [ 714.806398][ T27] panic+0x218/0x508 [ 714.807283][ T27] hung_task_panic+0x0/0x2c [ 714.808302][ T27] kthread+0x12c/0x158 [ 714.809298][ T27] ret_from_fork+0x10/0x20 [ 714.810391][ T27] SMP: stopping secondary CPUs [ 714.811639][ T27] Kernel Offset: disabled [ 714.812668][ T27] CPU features: 0x00000,040e0108,4c017203 [ 714.813913][ T27] Memory Limit: none [ 715.092747][ T27] Rebooting in 86400 seconds..