[ 10.525665][ T2658] 8021q: adding VLAN 0 to HW filter on device bond0 [ 10.529860][ T2658] eql: remember to turn off Van-Jacobson compression on your slave devices [ 10.558532][ T49] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 10.563473][ T23] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller syzkaller login: [ 69.620386][ T21] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. executing program [ 504.251032][ T3115] nbd0: detected capacity change from 0 to 131072 [ 504.362618][ T45] block nbd0: Receive control failed (result -104) [ 534.259520][ T50] block nbd0: Possible stuck request 000000007e6b82a7: control (read@0,4096B). Runtime 30 seconds [ 564.322799][ T2604] udevd[2604]: worker [3114] /devices/virtual/block/nbd0 is taking a long time [ 564.339560][ T50] block nbd0: Possible stuck request 000000007e6b82a7: control (read@0,4096B). Runtime 60 seconds [ 594.419531][ T50] block nbd0: Possible stuck request 000000007e6b82a7: control (read@0,4096B). Runtime 90 seconds [ 624.499530][ T50] block nbd0: Possible stuck request 000000007e6b82a7: control (read@0,4096B). Runtime 120 seconds [ 654.579544][ T50] block nbd0: Possible stuck request 000000007e6b82a7: control (read@0,4096B). Runtime 150 seconds [ 684.459568][ T2604] udevd[2604]: worker [3114] /devices/virtual/block/nbd0 timeout; kill it [ 684.462450][ T2604] udevd[2604]: seq 6838 '/devices/virtual/block/nbd0' killed [ 684.659531][ T50] block nbd0: Possible stuck request 000000007e6b82a7: control (read@0,4096B). Runtime 180 seconds [ 714.739525][ T50] block nbd0: Possible stuck request 000000007e6b82a7: control (read@0,4096B). Runtime 210 seconds [ 714.739572][ T27] INFO: task syz-executor347:3111 blocked for more than 143 seconds. [ 714.744599][ T27] Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 [ 714.746629][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 714.748956][ T27] task:syz-executor347 state:D stack:0 pid:3111 ppid:3110 flags:0x00000001 [ 714.751527][ T27] Call trace: [ 714.752374][ T27] __switch_to+0x180/0x298 [ 714.753606][ T27] __schedule+0x408/0x594 [ 714.754715][ T27] schedule+0x64/0xa4 [ 714.755760][ T27] schedule_preempt_disabled+0x18/0x2c [ 714.757216][ T27] __mutex_lock_common+0x788/0xca8 [ 714.758532][ T27] mutex_lock_nested+0x38/0x44 [ 714.759841][ T27] blkdev_put+0x78/0x284 [ 714.760967][ T27] blkdev_close+0x24/0x38 [ 714.762142][ T27] __fput+0x198/0x3e4 [ 714.763181][ T27] ____fput+0x20/0x30 [ 714.764228][ T27] task_work_run+0x100/0x148 [ 714.765437][ T27] do_notify_resume+0x174/0x1f0 [ 714.766712][ T27] el0_svc+0x9c/0x150 [ 714.767776][ T27] el0t_64_sync_handler+0x84/0xf0 [ 714.769115][ T27] el0t_64_sync+0x190/0x194 [ 714.770354][ T27] [ 714.770354][ T27] Showing all locks held in the system: [ 714.772392][ T27] 1 lock held by rcu_tasks_kthre/11: [ 714.773779][ T27] #0: ffff80000d4a4768 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 714.776538][ T27] 1 lock held by rcu_tasks_trace/12: [ 714.777952][ T27] #0: ffff80000d4a4db8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 714.780934][ T27] 1 lock held by khungtaskd/27: [ 714.782208][ T27] #0: ffff80000d4a4640 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 [ 714.784717][ T27] 2 locks held by getty/2762: [ 714.785949][ T27] #0: ffff0000c7c14098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 [ 714.788526][ T27] #1: ffff80000f6be2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c [ 714.791204][ T27] 1 lock held by syz-executor347/3111: [ 714.792620][ T27] #0: ffff0000c5ddccc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x78/0x284 [ 714.795107][ T27] 1 lock held by udevd/3114: [ 714.796281][ T27] #0: ffff0000c5ddccc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc [ 714.798900][ T27] [ 714.799554][ T27] ============================================= [ 714.799554][ T27] [ 714.801749][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 714.803534][ T27] CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 [ 714.806112][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 714.808692][ T27] Call trace: [ 714.809556][ T27] dump_backtrace+0x1c4/0x1f0 [ 714.810779][ T27] show_stack+0x2c/0x3c [ 714.811875][ T27] dump_stack_lvl+0x104/0x16c [ 714.813135][ T27] dump_stack+0x1c/0x58 [ 714.814268][ T27] panic+0x218/0x508 [ 714.815293][ T27] hung_task_panic+0x0/0x2c [ 714.816512][ T27] kthread+0x12c/0x158 [ 714.817590][ T27] ret_from_fork+0x10/0x20 [ 714.818752][ T27] SMP: stopping secondary CPUs [ 714.820034][ T27] Kernel Offset: disabled [ 714.821200][ T27] CPU features: 0x00000,040e0108,4c017203 [ 714.822743][ T27] Memory Limit: none [ 715.068576][ T27] Rebooting in 86400 seconds..