[ 9.484360][ T2614] 8021q: adding VLAN 0 to HW filter on device bond0 [ 9.493272][ T2614] eql: remember to turn off Van-Jacobson compression on your slave devices [ 9.518768][ T48] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 9.520351][ T1283] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller syzkaller login: [ 69.604708][ T6] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.103' (ECDSA) to the list of known hosts. executing program [ 494.175127][ T3075] nbd0: detected capacity change from 0 to 10 [ 494.286710][ T3072] block nbd0: shutting down sockets [ 524.643816][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 30 seconds [ 554.247441][ T2560] udevd[2560]: worker [3074] /devices/virtual/block/nbd0 is taking a long time [ 554.723833][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 60 seconds [ 584.803895][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 90 seconds [ 614.883818][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 120 seconds [ 644.963824][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 150 seconds [ 674.389397][ T2560] udevd[2560]: worker [3074] /devices/virtual/block/nbd0 timeout; kill it [ 674.391683][ T2560] udevd[2560]: seq 6712 '/devices/virtual/block/nbd0' killed [ 674.391720][ T3074] ldm_validate_partition_table(): Disk read failed. [ 674.394950][ T3074] Dev nbd0: unable to read RDB block 0 [ 674.396295][ T3074] nbd0: unable to read partition table [ 674.397770][ T3074] nbd0: partition table beyond EOD, truncated executing program [ 674.402729][ T2560] udevd[2560]: worker [3074] terminated by signal 9 (Killed) [ 674.404546][ T2560] udevd[2560]: worker [3074] failed while handling '/devices/virtual/block/nbd0' [ 675.043879][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 180 seconds [ 705.123845][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 210 seconds [ 735.203817][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 240 seconds [ 765.283816][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 270 seconds [ 795.363836][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 300 seconds [ 825.443834][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 330 seconds [ 855.523873][ T75] block nbd0: Possible stuck request 000000005fb56dfc: control (read@0,4096B). Runtime 360 seconds [ 858.083929][ T26] INFO: task syz-executor226:3084 blocked for more than 143 seconds. [ 858.085999][ T26] Not tainted 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 [ 858.087795][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.089875][ T26] task:syz-executor226 state:D stack: 0 pid: 3084 ppid: 3070 flags:0x00000001 [ 858.091795][ T26] Call trace: [ 858.092569][ T26] __switch_to+0x180/0x28c [ 858.093541][ T26] __schedule+0x414/0x570 [ 858.094574][ T26] schedule+0x64/0xa4 [ 858.095485][ T26] blk_mq_freeze_queue_wait+0x94/0xf4 [ 858.096811][ T26] blk_freeze_queue+0x94/0xa8 [ 858.097921][ T26] blk_mq_freeze_queue+0x20/0x30 [ 858.099088][ T26] nbd_add_socket+0x78/0x26c [ 858.100284][ T26] __nbd_ioctl+0x80/0x320 [ 858.101417][ T26] nbd_ioctl+0xec/0x13c [ 858.102386][ T26] blkdev_ioctl+0x250/0x764 [ 858.103473][ T26] __arm64_sys_ioctl+0xd0/0x140 [ 858.104766][ T26] el0_svc_common+0x138/0x220 [ 858.105912][ T26] do_el0_svc+0x48/0x154 [ 858.106932][ T26] el0_svc+0x58/0x150 [ 858.107876][ T26] el0t_64_sync_handler+0x84/0xf0 [ 858.109087][ T26] el0t_64_sync+0x18c/0x190 [ 858.110201][ T26] INFO: task syz-executor226:3085 blocked for more than 143 seconds. [ 858.112096][ T26] Not tainted 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 [ 858.114002][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.116117][ T26] task:syz-executor226 state:D stack: 0 pid: 3085 ppid: 3070 flags:0x00000001 [ 858.118321][ T26] Call trace: [ 858.119074][ T26] __switch_to+0x180/0x28c [ 858.120131][ T26] __schedule+0x414/0x570 [ 858.121230][ T26] schedule+0x64/0xa4 [ 858.122065][ T26] schedule_preempt_disabled+0x18/0x2c [ 858.123121][ T26] __mutex_lock_common+0x74c/0xc28 [ 858.124379][ T26] mutex_lock_nested+0x38/0x44 [ 858.125481][ T26] nbd_ioctl+0x70/0x13c [ 858.126517][ T26] blkdev_ioctl+0x250/0x764 [ 858.127606][ T26] __arm64_sys_ioctl+0xd0/0x140 [ 858.128811][ T26] el0_svc_common+0x138/0x220 [ 858.129953][ T26] do_el0_svc+0x48/0x154 [ 858.130913][ T26] el0_svc+0x58/0x150 [ 858.131839][ T26] el0t_64_sync_handler+0x84/0xf0 [ 858.133032][ T26] el0t_64_sync+0x18c/0x190 [ 858.134211][ T26] INFO: task syz-executor226:3086 blocked for more than 143 seconds. [ 858.136161][ T26] Not tainted 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 [ 858.137984][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.140324][ T26] task:syz-executor226 state:D stack: 0 pid: 3086 ppid: 3070 flags:0x00000001 [ 858.142531][ T26] Call trace: [ 858.143232][ T26] __switch_to+0x180/0x28c [ 858.144163][ T26] __schedule+0x414/0x570 [ 858.145000][ T26] schedule+0x64/0xa4 [ 858.145801][ T26] schedule_preempt_disabled+0x18/0x2c [ 858.146861][ T26] __mutex_lock_common+0x74c/0xc28 [ 858.148065][ T26] mutex_lock_nested+0x38/0x44 [ 858.149262][ T26] nbd_ioctl+0x70/0x13c [ 858.150253][ T26] blkdev_ioctl+0x250/0x764 [ 858.151305][ T26] __arm64_sys_ioctl+0xd0/0x140 [ 858.152442][ T26] el0_svc_common+0x138/0x220 [ 858.153533][ T26] do_el0_svc+0x48/0x154 [ 858.154632][ T26] el0_svc+0x58/0x150 [ 858.155605][ T26] el0t_64_sync_handler+0x84/0xf0 [ 858.156797][ T26] el0t_64_sync+0x18c/0x190 [ 858.157861][ T26] [ 858.157861][ T26] Showing all locks held in the system: [ 858.159719][ T26] 1 lock held by rcu_tasks_kthre/10: [ 858.160960][ T26] #0: ffff80000d4a3568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 858.163527][ T26] 1 lock held by rcu_tasks_trace/11: [ 858.164852][ T26] #0: ffff80000d4a3bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 858.167488][ T26] 1 lock held by khungtaskd/26: [ 858.168656][ T26] #0: ffff80000d4a3440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 [ 858.170895][ T26] 2 locks held by getty/2720: [ 858.172016][ T26] #0: ffff0000c7460098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 [ 858.174428][ T26] #1: ffff80000f67e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x88c [ 858.176830][ T26] 1 lock held by syz-executor226/3084: [ 858.178094][ T26] #0: ffff0000c51d1998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c [ 858.180307][ T26] 1 lock held by syz-executor226/3085: [ 858.181660][ T26] #0: ffff0000c51d1998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c [ 858.183973][ T26] 1 lock held by syz-executor226/3086: [ 858.185243][ T26] #0: ffff0000c51d1998 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c [ 858.187478][ T26] [ 858.188017][ T26] ============================================= [ 858.188017][ T26] [ 858.190122][ T26] Kernel panic - not syncing: hung_task: blocked tasks [ 858.191740][ T26] CPU: 0 PID: 26 Comm: khungtaskd Not tainted 6.0.0-rc4-syzkaller-17186-g25050c56fa3c #0 [ 858.194157][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 858.196593][ T26] Call trace: [ 858.197377][ T26] dump_backtrace+0x1b0/0x1dc [ 858.198536][ T26] show_stack+0x2c/0x64 [ 858.199557][ T26] dump_stack_lvl+0x104/0x16c [ 858.200750][ T26] dump_stack+0x1c/0x58 [ 858.201811][ T26] panic+0x218/0x514 [ 858.202964][ T26] hung_task_panic+0x0/0x2c [ 858.204148][ T26] kthread+0x12c/0x158 [ 858.205203][ T26] ret_from_fork+0x10/0x20 [ 858.206350][ T26] SMP: stopping secondary CPUs [ 858.207663][ T26] Kernel Offset: disabled [ 858.208769][ T26] CPU features: 0x0000,0081c021,09805c80 [ 858.210132][ T26] Memory Limit: none [ 858.362415][ T26] Rebooting in 86400 seconds..