[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.17' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 716.071500][ T27] INFO: task syz-executor168:6577 blocked for more than 143 seconds. [ 716.088642][ T27] Not tainted 5.15.0-rc2-syzkaller #0 [ 716.116515][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.161426][ T27] task:syz-executor168 state:D stack:28120 pid: 6577 ppid: 6561 flags:0x00004002 [ 716.170678][ T27] Call Trace: [ 716.201400][ T27] __schedule+0x940/0x26f0 [ 716.205960][ T27] ? io_schedule_timeout+0x140/0x140 [ 716.211284][ T27] schedule+0xd3/0x270 [ 716.231346][ T27] schedule_preempt_disabled+0xf/0x20 [ 716.236746][ T27] __mutex_lock+0xa34/0x12f0 [ 716.261394][ T27] ? vhost_net_stop+0x142/0x270 [ 716.266357][ T27] ? mutex_lock_io_nested+0x1150/0x1150 [ 716.301398][ T27] ? vhost_net_buf_unproduce+0x16/0x560 [ 716.306985][ T27] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 716.331340][ T27] vhost_net_stop+0x142/0x270 [ 716.336056][ T27] vhost_net_release+0x9c/0x2d0 [ 716.340921][ T27] ? vhost_net_stop+0x270/0x270 [ 716.381377][ T27] ? fcntl_setlk+0xd50/0xd50 [ 716.386072][ T27] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 716.421388][ T27] ? ima_file_free+0xb6/0x420 [ 716.426169][ T27] __fput+0x288/0x9f0 [ 716.430214][ T27] ? vhost_net_stop+0x270/0x270 [ 716.461472][ T27] task_work_run+0xdd/0x1a0 [ 716.466068][ T27] do_exit+0xbae/0x2a30 [ 716.470265][ T27] ? __context_tracking_exit+0xb8/0xe0 [ 716.501377][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.506272][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 716.511140][ T27] ? mm_update_next_owner+0x7a0/0x7a0 [ 716.561383][ T27] do_group_exit+0x125/0x310 [ 716.566027][ T27] __x64_sys_exit_group+0x3a/0x50 [ 716.571067][ T27] do_syscall_64+0x35/0xb0 [ 716.601378][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.607316][ T27] RIP: 0033:0x7f371b510c29 [ 716.631312][ T27] RSP: 002b:00007ffda8fe8ae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 716.639754][ T27] RAX: ffffffffffffffda RBX: 00007f371b585330 RCX: 00007f371b510c29 [ 716.691310][ T27] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 716.699306][ T27] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 716.731357][ T27] R10: 0000000000000001 R11: 0000000000000246 R12: 00007f371b585330 [ 716.739358][ T27] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 executing program [ 716.792043][ T27] INFO: task syz-executor168:6742 blocked for more than 144 seconds. [ 716.800132][ T27] Not tainted 5.15.0-rc2-syzkaller #0 [ 716.831384][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.840070][ T27] task:syz-executor168 state:D stack:27760 pid: 6742 ppid: 6562 flags:0x00004002 [ 716.891312][ T27] Call Trace: [ 716.894622][ T27] __schedule+0x940/0x26f0 [ 716.899067][ T27] ? io_schedule_timeout+0x140/0x140 [ 716.931319][ T27] schedule+0xd3/0x270 [ 716.935530][ T27] schedule_preempt_disabled+0xf/0x20 [ 716.941017][ T27] __mutex_lock+0xa34/0x12f0 [ 716.971309][ T27] ? vhost_net_stop+0x142/0x270 [ 716.976221][ T27] ? mutex_lock_io_nested+0x1150/0x1150 [ 717.001328][ T27] ? vhost_net_buf_unproduce+0x16/0x560 [ 717.031308][ T27] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 717.037422][ T27] vhost_net_stop+0x142/0x270 [ 717.061322][ T27] vhost_net_release+0x9c/0x2d0 [ 717.066300][ T27] ? vhost_net_stop+0x270/0x270 [ 717.071163][ T27] ? fcntl_setlk+0xd50/0xd50 [ 717.101313][ T27] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 717.107602][ T27] ? ima_file_free+0xb6/0x420 [ 717.131294][ T27] __fput+0x288/0x9f0 [ 717.135309][ T27] ? vhost_net_stop+0x270/0x270 [ 717.140175][ T27] task_work_run+0xdd/0x1a0 [ 717.181386][ T27] do_exit+0xbae/0x2a30 [ 717.185587][ T27] ? __context_tracking_exit+0xb8/0xe0 [ 717.191062][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 717.231293][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 717.236194][ T27] ? mm_update_next_owner+0x7a0/0x7a0 [ 717.261357][ T27] do_group_exit+0x125/0x310 [ 717.265998][ T27] __x64_sys_exit_group+0x3a/0x50 [ 717.271037][ T27] do_syscall_64+0x35/0xb0 [ 717.301300][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 717.307228][ T27] RIP: 0033:0x7f371b510c29 [ 717.341294][ T27] RSP: 002b:00007ffda8fe8ae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 717.349735][ T27] RAX: ffffffffffffffda RBX: 00007f371b585330 RCX: 00007f371b510c29 [ 717.391274][ T27] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 717.399269][ T27] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 717.441288][ T27] R10: 0000000000000001 R11: 0000000000000246 R12: 00007f371b585330 [ 717.449284][ T27] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 717.481398][ T27] INFO: task syz-executor168:6979 blocked for more than 144 seconds. [ 717.489493][ T27] Not tainted 5.15.0-rc2-syzkaller #0 [ 717.541285][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 717.550106][ T27] task:syz-executor168 state:D stack:28152 pid: 6979 ppid: 6560 flags:0x00004002 [ 717.581288][ T27] Call Trace: [ 717.584595][ T27] __schedule+0x940/0x26f0 [ 717.589039][ T27] ? io_schedule_timeout+0x140/0x140 [ 717.631282][ T27] schedule+0xd3/0x270 [ 717.635399][ T27] schedule_preempt_disabled+0xf/0x20 [ 717.640784][ T27] __mutex_lock+0xa34/0x12f0 [ 717.671501][ T27] ? vhost_net_stop+0x142/0x270 [ 717.676402][ T27] ? mutex_lock_io_nested+0x1150/0x1150 [ 717.711300][ T27] ? vhost_net_buf_unproduce+0x16/0x560 [ 717.716897][ T27] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 717.751271][ T27] vhost_net_stop+0x142/0x270 [ 717.756161][ T27] vhost_net_release+0x9c/0x2d0 [ 717.761030][ T27] ? vhost_net_stop+0x270/0x270 [ 717.791486][ T27] ? fcntl_setlk+0xd50/0xd50 [ 717.796297][ T27] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 717.831267][ T27] ? ima_file_free+0xb6/0x420 [ 717.835983][ T27] __fput+0x288/0x9f0 [ 717.839978][ T27] ? vhost_net_stop+0x270/0x270 [ 717.871264][ T27] task_work_run+0xdd/0x1a0 [ 717.875807][ T27] do_exit+0xbae/0x2a30 [ 717.880117][ T27] ? __context_tracking_exit+0xb8/0xe0 [ 717.911506][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 717.916397][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 717.951274][ T27] ? mm_update_next_owner+0x7a0/0x7a0 [ 717.956705][ T27] do_group_exit+0x125/0x310 [ 717.981278][ T27] __x64_sys_exit_group+0x3a/0x50 [ 717.986348][ T27] do_syscall_64+0x35/0xb0 [ 717.990788][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 718.031485][ T27] RIP: 0033:0x7f371b510c29 [ 718.035924][ T27] RSP: 002b:00007ffda8fe8ae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 718.071257][ T27] RAX: ffffffffffffffda RBX: 00007f371b585330 RCX: 00007f371b510c29 [ 718.079254][ T27] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 718.111241][ T27] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 718.119235][ T27] R10: 0000000000000001 R11: 0000000000000246 R12: 00007f371b585330 executing program [ 718.171239][ T27] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 718.201997][ T27] INFO: task syz-executor168:7372 blocked for more than 145 seconds. [ 718.210082][ T27] Not tainted 5.15.0-rc2-syzkaller #0 [ 718.241295][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 718.249987][ T27] task:syz-executor168 state:D stack:27840 pid: 7372 ppid: 6557 flags:0x00004002 [ 718.301251][ T27] Call Trace: [ 718.304572][ T27] __schedule+0x940/0x26f0 [ 718.309020][ T27] ? io_schedule_timeout+0x140/0x140 [ 718.341258][ T27] schedule+0xd3/0x270 [ 718.345377][ T27] schedule_preempt_disabled+0xf/0x20 [ 718.350782][ T27] __mutex_lock+0xa34/0x12f0 [ 718.381251][ T27] ? vhost_net_stop+0x142/0x270 [ 718.386142][ T27] ? mutex_lock_io_nested+0x1150/0x1150 [ 718.411281][ T27] ? vhost_net_buf_unproduce+0x16/0x560 [ 718.416871][ T27] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 718.451274][ T27] vhost_net_stop+0x142/0x270 [ 718.455992][ T27] vhost_net_release+0x9c/0x2d0 [ 718.460856][ T27] ? vhost_net_stop+0x270/0x270 [ 718.491276][ T27] ? fcntl_setlk+0xd50/0xd50 [ 718.495909][ T27] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 718.527913][ T27] ? ima_file_free+0xb6/0x420 [ 718.551272][ T27] __fput+0x288/0x9f0 [ 718.555282][ T27] ? vhost_net_stop+0x270/0x270 [ 718.560155][ T27] task_work_run+0xdd/0x1a0 [ 718.591269][ T27] do_exit+0xbae/0x2a30 [ 718.595465][ T27] ? __context_tracking_exit+0xb8/0xe0 [ 718.600962][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 718.631260][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 718.636152][ T27] ? mm_update_next_owner+0x7a0/0x7a0 [ 718.671279][ T27] do_group_exit+0x125/0x310 [ 718.675920][ T27] __x64_sys_exit_group+0x3a/0x50 [ 718.681042][ T27] do_syscall_64+0x35/0xb0 [ 718.711483][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 718.717429][ T27] RIP: 0033:0x7f371b510c29 [ 718.751250][ T27] RSP: 002b:00007ffda8fe8ae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 718.759698][ T27] RAX: ffffffffffffffda RBX: 00007f371b585330 RCX: 00007f371b510c29 [ 718.801220][ T27] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 718.809231][ T27] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 718.851263][ T27] R10: 0000000000000001 R11: 0000000000000246 R12: 00007f371b585330 [ 718.859270][ T27] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 718.901322][ T27] INFO: task syz-executor168:7497 blocked for more than 146 seconds. [ 718.909439][ T27] Not tainted 5.15.0-rc2-syzkaller #0 [ 718.941220][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 718.949917][ T27] task:syz-executor168 state:D stack:28152 pid: 7497 ppid: 6556 flags:0x00000002 [ 719.001220][ T27] Call Trace: [ 719.004550][ T27] __schedule+0x940/0x26f0 [ 719.031307][ T27] ? io_schedule_timeout+0x140/0x140 [ 719.036639][ T27] schedule+0xd3/0x270 [ 719.040726][ T27] schedule_preempt_disabled+0xf/0x20 [ 719.071233][ T27] __mutex_lock+0xa34/0x12f0 [ 719.075864][ T27] ? vhost_net_stop+0x142/0x270 [ 719.080728][ T27] ? mutex_lock_io_nested+0x1150/0x1150 [ 719.121440][ T27] ? vhost_net_buf_unproduce+0x16/0x560 [ 719.127032][ T27] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 719.161214][ T27] vhost_net_stop+0x142/0x270 [ 719.165939][ T27] vhost_net_release+0x9c/0x2d0 [ 719.170809][ T27] ? vhost_net_stop+0x270/0x270 [ 719.201202][ T27] ? fcntl_setlk+0xd50/0xd50 [ 719.205842][ T27] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 719.241416][ T27] ? ima_file_free+0xb6/0x420 [ 719.246221][ T27] __fput+0x288/0x9f0 [ 719.250215][ T27] ? vhost_net_stop+0x270/0x270 [ 719.281212][ T27] task_work_run+0xdd/0x1a0 [ 719.285759][ T27] do_exit+0xbae/0x2a30 [ 719.289928][ T27] ? __context_tracking_exit+0xb8/0xe0 [ 719.321198][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 719.326087][ T27] ? lock_downgrade+0x6e0/0x6e0 [ 719.330953][ T27] ? mm_update_next_owner+0x7a0/0x7a0 [ 719.381206][ T27] do_group_exit+0x125/0x310 [ 719.385838][ T27] __x64_sys_exit_group+0x3a/0x50 [ 719.390875][ T27] do_syscall_64+0x35/0xb0 [ 719.421278][ T27] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 719.427212][ T27] RIP: 0033:0x7f371b510c29 [ 719.451231][ T27] RSP: 002b:00007ffda8fe8ae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 719.459676][ T27] RAX: ffffffffffffffda RBX: 00007f371b585330 RCX: 00007f371b510c29 [ 719.501410][ T27] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 719.509408][ T27] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 719.551207][ T27] R10: 0000000000000001 R11: 0000000000000246 R12: 00007f371b585330 [ 719.559208][ T27] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 executing program [ 719.611308][ T27] [ 719.611308][ T27] Showing all locks held in the system: [ 719.619052][ T27] 1 lock held by khungtaskd/27: [ 719.641885][ T27] #0: ffffffff8b97fea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 719.681261][ T27] 1 lock held by in:imklog/6243: [ 719.686215][ T27] #0: ffff888026bb14f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 [ 719.721210][ T27] 2 locks held by syz-executor168/6559: [ 719.726808][ T27] #0: ffff8880b9d31a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26f0 [ 719.761189][ T27] #1: ffff8880b9d1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: task_group_account_field+0x28/0x290 [ 719.801181][ T27] 1 lock held by syz-executor168/6577: [ 719.806669][ T27] #0: ffff88806cb20218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 [ 719.851208][ T27] 1 lock held by vhost-6577/6584: [ 719.856268][ T27] 1 lock held by syz-executor168/6742: [ 719.891206][ T27] #0: ffff888072f20218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 [ 719.891297][ T27] 1 lock held by vhost-6742/6747: [ 719.891312][ T27] 3 locks held by kworker/1:0/6907: [ 719.891327][ T27] 1 lock held by syz-executor168/6979: [ 719.891341][ T27] #0: ffff888072e70218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 [ 719.970382][ T27] 1 lock held by vhost-6979/6983: [ 720.001165][ T27] 1 lock held by syz-executor168/7372: [ 720.028102][ T27] #0: ffff88801e9e0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 [ 720.061160][ T27] 1 lock held by vhost-7372/7374: [ 720.066203][ T27] 1 lock held by syz-executor168/7497: [ 720.091185][ T27] #0: ffff88807d8f0218 (&vq->mutex){+.+.}-{3:3}, at: vhost_net_stop+0x142/0x270 [ 720.100386][ T27] 1 lock held by vhost-7497/7499: [ 720.131409][ T27] 1 lock held by syz-executor168/22982: [ 720.136972][ T27] #0: ffffffff8b989228 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4fc/0x620 executing program [ 720.191254][ T27] [ 720.193633][ T27] ============================================= [ 720.193633][ T27] [ 720.221809][ T27] NMI backtrace for cpu 0 [ 720.226163][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc2-syzkaller #0 [ 720.234322][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 720.244379][ T27] Call Trace: [ 720.247656][ T27] dump_stack_lvl+0xcd/0x134 [ 720.252325][ T27] nmi_cpu_backtrace.cold+0x47/0x144 [ 720.257618][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 720.262875][ T27] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 720.268899][ T27] watchdog+0xc1d/0xf50 [ 720.273065][ T27] ? reset_hung_task_detector+0x30/0x30 [ 720.278617][ T27] kthread+0x3e5/0x4d0 [ 720.282692][ T27] ? set_kthread_struct+0x130/0x130 [ 720.287914][ T27] ret_from_fork+0x1f/0x30 [ 720.292570][ T27] Sending NMI from CPU 0 to CPUs 1: [ 720.297781][ C1] NMI backtrace for cpu 1 [ 720.297790][ C1] CPU: 1 PID: 6584 Comm: vhost-6577 Not tainted 5.15.0-rc2-syzkaller #0 [ 720.297813][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 720.297825][ C1] RIP: 0010:__sanitizer_cov_trace_cmp8+0x69/0x70 [ 720.297853][ C1] Code: 3c cd 28 00 00 00 48 39 fe 72 1f 48 83 c2 01 4c 89 44 38 e8 48 c7 44 38 e0 06 00 00 00 48 89 4c 38 f0 4e 89 54 c8 20 48 89 10 66 0f 1f 44 00 00 53 41 89 fb 41 89 f1 bf 03 00 00 00 65 48 8b [ 720.297873][ C1] RSP: 0018:ffffc90002ccfae8 EFLAGS: 00000246 [ 720.297889][ C1] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 720.297902][ C1] RDX: 0000000000000000 RSI: ffff8880205c0000 RDI: 0000000000000003 [ 720.297916][ C1] RBP: 0000000000000000 R08: 000000000000000f R09: ffff88806cb201bb [ 720.297929][ C1] R10: ffffffff86c705f4 R11: 0000000000000001 R12: ffff88807bab0500 [ 720.297943][ C1] R13: 000000000000000f R14: ffffffffffffffff R15: 0000000000000000 [ 720.297957][ C1] FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 720.297975][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 720.297990][ C1] CR2: 00007f371b583130 CR3: 0000000024ae7000 CR4: 00000000001506e0 [ 720.298003][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 720.298016][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 720.298029][ C1] Call Trace: [ 720.298034][ C1] vhost_iotlb_itree_first+0xd4/0x280 [ 720.298107][ C1] iotlb_access_ok+0x1ce/0x3e0 [ 720.298137][ C1] vq_meta_prefetch+0xbc/0x280 [ 720.298161][ C1] handle_rx+0x145/0x1b40 [ 720.298182][ C1] ? __lock_acquire+0x162f/0x54a0 [ 720.298208][ C1] ? finish_task_switch.isra.0+0x22d/0xa50 [ 720.298256][ C1] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 720.298283][ C1] ? vhost_net_ioctl+0x1740/0x1740 [ 720.298307][ C1] ? find_held_lock+0x2d/0x110 [ 720.298334][ C1] ? _raw_spin_unlock_irqrestore+0x50/0x70 executing program [ 720.298361][ C1] vhost_worker+0x23d/0x3d0 [ 720.298385][ C1] ? vhost_dev_reset_owner+0x160/0x160 [ 720.298410][ C1] kthread+0x3e5/0x4d0 [ 720.298432][ C1] ? set_kthread_struct+0x130/0x130 [ 720.298458][ C1] ret_from_fork+0x1f/0x30 [ 720.641121][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 720.647995][ T27] CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc2-syzkaller #0 [ 720.656152][ T27] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 720.666232][ T27] Call Trace: [ 720.669514][ T27] dump_stack_lvl+0xcd/0x134 [ 720.674114][ T27] panic+0x2b0/0x6dd [ 720.678018][ T27] ? __warn_printk+0xf3/0xf3 [ 720.682618][ T27] ? lapic_can_unplug_cpu+0x80/0x80 [ 720.687828][ T27] ? preempt_schedule_thunk+0x16/0x18 [ 720.693209][ T27] ? nmi_trigger_cpumask_backtrace+0x191/0x220 [ 720.699379][ T27] ? watchdog.cold+0x130/0x158 [ 720.704201][ T27] watchdog.cold+0x141/0x158 [ 720.708815][ T27] ? reset_hung_task_detector+0x30/0x30 [ 720.714385][ T27] kthread+0x3e5/0x4d0 [ 720.718476][ T27] ? set_kthread_struct+0x130/0x130 [ 720.723696][ T27] ret_from_fork+0x1f/0x30 [ 720.728512][ T27] Kernel Offset: disabled [ 720.732872][ T27] Rebooting in 86400 seconds..