[ 9.391980][ T2615] 8021q: adding VLAN 0 to HW filter on device bond0 [ 9.395096][ T2615] eql: remember to turn off Van-Jacobson compression on your slave devices [ 9.422728][ T1006] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 9.425761][ T2524] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller syzkaller login: [ 69.602535][ T2167] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.173' (ECDSA) to the list of known hosts. executing program [ 498.822370][ T3066] nbd0: detected capacity change from 0 to 258 [ 503.796602][ T3066] block nbd0: shutting down sockets [ 529.121619][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 30 seconds [ 558.889182][ T2561] udevd[2561]: worker [3068] /devices/virtual/block/nbd0 is taking a long time [ 559.201647][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 60 seconds [ 589.281649][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 90 seconds [ 619.361610][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 120 seconds [ 649.441674][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 150 seconds [ 679.025170][ T2561] udevd[2561]: worker [3068] /devices/virtual/block/nbd0 timeout; kill it [ 679.027540][ T2561] udevd[2561]: seq 6711 '/devices/virtual/block/nbd0' killed [ 679.027587][ T3068] ldm_validate_partition_table(): Disk read failed. [ 679.031085][ T3068] Dev nbd0: unable to read RDB block 0 [ 679.032524][ T3068] nbd0: unable to read partition table [ 679.033893][ T3068] nbd0: partition table beyond EOD, truncated executing program [ 679.037536][ T3075] nbd0: detected capacity change from 0 to 258 [ 679.038251][ T2561] udevd[2561]: worker [3068] terminated by signal 9 (Killed) [ 679.040976][ T2561] udevd[2561]: worker [3068] failed while handling '/devices/virtual/block/nbd0' [ 679.521601][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 180 seconds [ 709.601621][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 210 seconds [ 739.109270][ T2561] udevd[2561]: worker [3076] /devices/virtual/block/nbd0 is taking a long time [ 739.681619][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 240 seconds [ 769.761664][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 270 seconds [ 799.841622][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 300 seconds [ 829.921619][ T75] block nbd0: Possible stuck request 000000002197c674: control (read@0,4096B). Runtime 330 seconds [ 858.081666][ T26] INFO: task syz-executor290:3075 blocked for more than 143 seconds. [ 858.083635][ T26] Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #0 [ 858.085615][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.087852][ T26] task:syz-executor290 state:D stack: 0 pid: 3075 ppid: 3065 flags:0x00000001 [ 858.089975][ T26] Call trace: [ 858.090743][ T26] __switch_to+0x180/0x28c [ 858.091833][ T26] __schedule+0x414/0x570 [ 858.092867][ T26] schedule+0x64/0xa4 [ 858.093853][ T26] blk_mq_freeze_queue_wait+0x94/0xf4 [ 858.095136][ T26] blk_freeze_queue+0x94/0xa8 [ 858.096211][ T26] blk_mq_freeze_queue+0x20/0x30 [ 858.097414][ T26] nbd_add_socket+0x78/0x26c [ 858.098496][ T26] __nbd_ioctl+0x80/0x320 [ 858.099547][ T26] nbd_ioctl+0xec/0x13c [ 858.100692][ T26] blkdev_ioctl+0x250/0x764 [ 858.101819][ T26] __arm64_sys_ioctl+0xd0/0x140 [ 858.102986][ T26] el0_svc_common+0x138/0x220 [ 858.104109][ T26] do_el0_svc+0x48/0x154 [ 858.105110][ T26] el0_svc+0x58/0x150 [ 858.106076][ T26] el0t_64_sync_handler+0x84/0xf0 [ 858.107442][ T26] el0t_64_sync+0x18c/0x190 [ 858.108516][ T26] INFO: task udevd:3076 blocked for more than 143 seconds. [ 858.110395][ T26] Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #0 [ 858.112297][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.114432][ T26] task:udevd state:D stack: 0 pid: 3076 ppid: 2561 flags:0x00000000 [ 858.116689][ T26] Call trace: [ 858.117493][ T26] __switch_to+0x180/0x28c [ 858.118519][ T26] __schedule+0x414/0x570 [ 858.119568][ T26] schedule+0x64/0xa4 [ 858.120688][ T26] io_schedule+0x38/0x104 [ 858.121820][ T26] folio_wait_bit_common+0x458/0x9f8 [ 858.123090][ T26] do_read_cache_folio+0x78/0x550 [ 858.124284][ T26] read_cache_folio+0x40/0x54 [ 858.125331][ T26] read_part_sector+0x60/0x1d8 [ 858.126641][ T26] adfspart_check_ICS+0x4c/0x38c [ 858.127881][ T26] bdev_disk_changed+0x340/0x63c [ 858.129069][ T26] blkdev_get_whole+0x1b0/0x1f8 [ 858.130267][ T26] blkdev_get_by_dev+0x178/0x2fc [ 858.131470][ T26] blkdev_open+0x84/0xd8 [ 858.132571][ T26] do_dentry_open+0x318/0x688 [ 858.133539][ T26] vfs_open+0x38/0x48 [ 858.134510][ T26] path_openat+0xe34/0x11c4 [ 858.135456][ T26] do_filp_open+0xdc/0x1b8 [ 858.136386][ T26] do_sys_openat2+0xb8/0x22c [ 858.137526][ T26] __arm64_sys_openat+0xb0/0xe0 [ 858.138686][ T26] el0_svc_common+0x138/0x220 [ 858.139798][ T26] do_el0_svc+0x48/0x154 [ 858.140798][ T26] el0_svc+0x58/0x150 [ 858.141790][ T26] el0t_64_sync_handler+0x84/0xf0 [ 858.143004][ T26] el0t_64_sync+0x18c/0x190 [ 858.144216][ T26] [ 858.144216][ T26] Showing all locks held in the system: [ 858.146217][ T26] 1 lock held by rcu_tasks_kthre/10: [ 858.147474][ T26] #0: ffff80000d4a3568 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 858.150012][ T26] 1 lock held by rcu_tasks_trace/11: [ 858.151279][ T26] #0: ffff80000d4a3bb8 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x3c/0x450 [ 858.154294][ T26] 1 lock held by khungtaskd/26: [ 858.155465][ T26] #0: ffff80000d4a3440 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x4/0x48 [ 858.157742][ T26] 2 locks held by getty/2717: [ 858.158858][ T26] #0: ffff0000c75ba898 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x28/0x58 [ 858.161199][ T26] #1: ffff80000f67e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x19c/0x88c [ 858.163791][ T26] 1 lock held by syz-executor290/3075: [ 858.165123][ T26] #0: ffff0000c5d72d98 (&nbd->config_lock){+.+.}-{3:3}, at: nbd_ioctl+0x70/0x13c [ 858.167334][ T26] 1 lock held by udevd/3076: [ 858.168445][ T26] #0: ffff0000c5654cc8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfc/0x2fc [ 858.170891][ T26] [ 858.171431][ T26] ============================================= [ 858.171431][ T26] [ 858.173569][ T26] Kernel panic - not syncing: hung_task: blocked tasks [ 858.175205][ T26] CPU: 1 PID: 26 Comm: khungtaskd Not tainted 6.0.0-rc3-syzkaller-16800-g85413d1e802e #0 [ 858.177578][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 858.179960][ T26] Call trace: [ 858.180747][ T26] dump_backtrace+0x1b0/0x1dc [ 858.181874][ T26] show_stack+0x2c/0x64 [ 858.182933][ T26] dump_stack_lvl+0x104/0x16c [ 858.184207][ T26] dump_stack+0x1c/0x58 [ 858.185261][ T26] panic+0x218/0x514 [ 858.186151][ T26] hung_task_panic+0x0/0x2c [ 858.187272][ T26] kthread+0x12c/0x158 [ 858.188287][ T26] ret_from_fork+0x10/0x20 [ 858.189439][ T26] SMP: stopping secondary CPUs [ 858.190650][ T26] Kernel Offset: disabled [ 858.191800][ T26] CPU features: 0x0000,0081c021,09805c80 [ 858.193187][ T26] Memory Limit: none [ 858.326129][ T26] Rebooting in 86400 seconds..