Warning: Permanently added '10.128.0.64' (ECDSA) to the list of known hosts. executing program [ 325.247787][ T5994] block nbd0: shutting down sockets [ 571.375968][ T29] INFO: task syz-executor384:5994 blocked for more than 143 seconds. [ 571.377751][ T29] Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 [ 571.379187][ T29] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 571.380998][ T29] task:syz-executor384 state:D stack:0 pid:5994 ppid:5993 flags:0x00000009 [ 571.382955][ T29] Call trace: [ 571.383697][ T29] __switch_to+0x320/0x754 [ 571.384641][ T29] __schedule+0x1368/0x23b8 [ 571.385610][ T29] schedule+0xc4/0x170 [ 571.386651][ T29] schedule_timeout+0xb8/0x348 [ 571.387687][ T29] do_wait_for_common+0x30c/0x468 [ 571.388751][ T29] wait_for_completion+0x48/0x60 [ 571.389810][ T29] __flush_workqueue+0x580/0x11c4 [ 571.390905][ T29] nbd_ioctl+0x8dc/0xc40 [ 571.391807][ T29] blkdev_ioctl+0x408/0xb40 [ 571.392725][ T29] __arm64_sys_ioctl+0x14c/0x1c8 [ 571.393728][ T29] invoke_syscall+0x98/0x2c0 [ 571.394696][ T29] el0_svc_common+0x138/0x244 [ 571.395785][ T29] do_el0_svc+0x64/0x198 [ 571.396676][ T29] el0_svc+0x4c/0x160 [ 571.397515][ T29] el0t_64_sync_handler+0x84/0xfc [ 571.398549][ T29] el0t_64_sync+0x190/0x194 [ 571.399471][ T29] [ 571.399471][ T29] Showing all locks held in the system: [ 571.401087][ T29] 1 lock held by rcu_tasks_kthre/13: [ 571.402180][ T29] #0: ffff80008e0916d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 [ 571.404398][ T29] 1 lock held by rcu_tasks_trace/14: [ 571.405511][ T29] #0: ffff80008e091a90 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 [ 571.407945][ T29] 1 lock held by khungtaskd/29: [ 571.408937][ T29] #0: ffff80008e091500 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 [ 571.410931][ T29] 2 locks held by kworker/u5:1/5548: [ 571.412043][ T29] #0: ffff0000ccce0938 ((wq_completion)nbd0-recv){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 [ 571.414253][ T29] #1: ffff800098687c20 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 [ 571.416673][ T29] 2 locks held by getty/5729: [ 571.417652][ T29] #0: ffff0000cf3fb098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c [ 571.419647][ T29] #1: ffff800092e002f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 [ 571.421741][ T29] [ 571.422263][ T29] ============================================= [ 571.422263][ T29] [ 571.423990][ T29] Kernel panic - not syncing: hung_task: blocked tasks [ 571.425424][ T29] CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 [ 571.427389][ T29] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 [ 571.429566][ T29] Call trace: [ 571.430249][ T29] dump_backtrace+0x1b8/0x1e4 [ 571.431210][ T29] show_stack+0x2c/0x44 [ 571.432086][ T29] dump_stack_lvl+0xd0/0x124 [ 571.433073][ T29] dump_stack+0x1c/0x28 [ 571.433991][ T29] panic+0x2d0/0x7b4 [ 571.434872][ T29] hung_task_panic+0x0/0x2c [ 571.435865][ T29] kthread+0x288/0x310 [ 571.436766][ T29] ret_from_fork+0x10/0x20 [ 571.437761][ T29] SMP: stopping secondary CPUs [ 571.438803][ T29] Kernel Offset: disabled [ 571.439777][ T29] CPU features: 0x0000004,0e008010,c4017203 [ 571.441093][ T29] Memory Limit: none [ 571.763490][ T29] Rebooting in 86400 seconds..