[ 9.087068][ T2615] 8021q: adding VLAN 0 to HW filter on device bond0 [ 9.091803][ T2615] eql: remember to turn off Van-Jacobson compression on your slave devices [ 9.118819][ T9] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 9.120309][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller syzkaller login: [ 64.483529][ T23] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.1.120' (ECDSA) to the list of known hosts. executing program [ 495.422841][ T3073] nbd0: detected capacity change from 0 to 4094 [ 500.397009][ T3073] block nbd0: shutting down sockets [ 525.922144][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 30 seconds [ 555.493686][ T2561] udevd[2561]: worker [3075] /devices/virtual/block/nbd0 is taking a long time [ 556.002586][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 60 seconds [ 586.082209][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 90 seconds [ 616.162175][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 120 seconds [ 646.242226][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 150 seconds [ 675.636097][ T2561] udevd[2561]: worker [3075] /devices/virtual/block/nbd0 timeout; kill it [ 675.638266][ T2561] udevd[2561]: seq 6710 '/devices/virtual/block/nbd0' killed [ 675.638312][ T3075] ldm_validate_partition_table(): Disk read failed. [ 675.641199][ T3075] Dev nbd0: unable to read RDB block 0 [ 675.642383][ T3075] nbd0: unable to read partition table [ 675.643614][ T3075] nbd0: partition table beyond EOD, truncated executing program [ 675.648046][ T2561] udevd[2561]: worker [3075] terminated by signal 9 (Killed) [ 675.649735][ T2561] udevd[2561]: worker [3075] failed while handling '/devices/virtual/block/nbd0' [ 676.322134][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 180 seconds [ 706.402174][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 210 seconds [ 736.482106][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 240 seconds [ 766.562132][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 270 seconds [ 796.642139][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 300 seconds [ 826.722218][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 330 seconds [ 856.802125][ T76] block nbd0: Possible stuck request 00000000350621e0: control (read@0,4096B). Runtime 360 seconds [ 858.082206][ T27] INFO: task syz-executor309:3082 blocked for more than 143 seconds. [ 858.084145][ T27] Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 [ 858.085934][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.087814][ T27] task:syz-executor309 state:D stack: 0 pid: 3082 ppid: 3072 flags:0x00000001 [ 858.089784][ T27] Call trace: [ 858.090622][ T27] __switch_to+0x180/0x298 [ 858.091553][ T27] __schedule+0x414/0x5a0 [ 858.092548][ T27] schedule+0x64/0xa4 [ 858.093447][ T27] blk_mq_freeze_queue_wait+0x94/0xf4 [ 858.094585][ T27] blk_freeze_queue+0x94/0xa8 [ 858.095781][ T27] blk_mq_freeze_queue+0x20/0x30 [ 858.096830][ T27] nbd_add_socket+0x78/0x27c [ 858.097889][ T27] __nbd_ioctl+0x80/0x334 [ 858.098877][ T27] nbd_ioctl+0xec/0x13c [ 858.099757][ T27] blkdev_ioctl+0x24c/0x6d8 [ 858.100764][ T27] __arm64_sys_ioctl+0xd0/0x140 [ 858.101851][ T27] el0_svc_common+0x138/0x220 [ 858.102950][ T27] do_el0_svc+0x48/0x164 [ 858.103892][ T27] el0_svc+0x58/0x150 [ 858.104696][ T27] el0t_64_sync_handler+0x84/0xf0 [ 858.105793][ T27] el0t_64_sync+0x18c/0x190 [ 858.106650][ T27] [ 858.106650][ T27] Showing all locks held in the system: [ 858.108223][ T27] 1 lock held by rcu_tasks_kthre/11: [ 858.109271][ T27] #0: ffff80000d433568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 858.111592][ T27] 1 lock held by rcu_tasks_trace/12: [ 858.112728][ T27] #0: ffff80000d433bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 858.115145][ T27] 1 lock held by khungtaskd/27: [ 858.116211][ T27] #0: ffff80000d433440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 [ 858.118102][ T27] 2 locks held by getty/2721: [ 858.118871][ T27] #0: ffff0000c6cda098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 [ 858.120990][ T27] #1: ffff80000f6162f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x89c [ 858.123229][ T27] 1 lock held by syz-executor309/3082: [ 858.124442][ T27] #0: ffff0000c5524998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c [ 858.126484][ T27] [ 858.126952][ T27] ============================================= [ 858.126952][ T27] [ 858.128757][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 858.130188][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 [ 858.132234][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 [ 858.133988][ T27] Call trace: [ 858.134634][ T27] dump_backtrace+0x1c4/0x1f0 [ 858.135692][ T27] show_stack+0x2c/0x54 [ 858.136634][ T27] dump_stack_lvl+0x104/0x16c [ 858.137736][ T27] dump_stack+0x1c/0x58 [ 858.138711][ T27] panic+0x218/0x50c [ 858.139549][ T27] hung_task_panic+0x0/0x2c [ 858.140552][ T27] kthread+0x12c/0x158 [ 858.141433][ T27] ret_from_fork+0x10/0x20 [ 858.142476][ T27] SMP: stopping secondary CPUs [ 858.143558][ T27] Kernel Offset: disabled [ 858.144394][ T27] CPU features: 0x00000,02070084,26017203 [ 858.145729][ T27] Memory Limit: none [ 858.297727][ T27] Rebooting in 86400 seconds..