Warning: Permanently added '10.128.0.243' (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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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: [ 778.546462][ T1097] INFO: task login:9337 blocked for more than 143 seconds. [ 778.553952][ T1097] Not tainted 5.4.0-syzkaller #0 [ 778.560017][ T1097] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 778.569131][ T1097] login D27648 9337 1 0x80000002 [ 778.575472][ T1097] Call Trace: [ 778.584675][ T1097] __schedule+0x934/0x1f90 [ 778.589989][ T1097] ? __sched_text_start+0x8/0x8 [ 778.594894][ T1097] ? __lock_acquire+0x29c9/0x4a00 [ 778.600328][ T1097] schedule+0xdc/0x2b0 [ 778.604402][ T1097] schedule_timeout+0x717/0xc50 [ 778.609655][ T1097] ? __kasan_check_read+0x11/0x20 [ 778.614685][ T1097] ? usleep_range+0x170/0x170 [ 778.619682][ T1097] ? mark_held_locks+0xa4/0xf0 [ 778.624457][ T1097] ? _raw_spin_unlock_irq+0x23/0x80 [ 778.630294][ T1097] ? __ldsem_down_write_nested+0x3aa/0x8f0 [ 778.637501][ T1097] ? _raw_spin_unlock_irq+0x23/0x80 [ 778.642716][ T1097] ? lockdep_hardirqs_on+0x421/0x5e0 [ 778.648586][ T1097] ? trace_hardirqs_on+0x67/0x240 [ 778.653637][ T1097] __ldsem_down_write_nested+0x3b2/0x8f0 [ 778.659862][ T1097] ? ldsem_wake+0x40/0x40 [ 778.664282][ T1097] ? ___might_sleep+0x163/0x2c0 [ 778.669536][ T1097] ? put_tty_driver+0x20/0x20 [ 778.674234][ T1097] ldsem_down_write+0x33/0x40 [ 778.679236][ T1097] ? ldsem_down_write+0x33/0x40 [ 778.684095][ T1097] tty_ldisc_lock+0x66/0xb0 [ 778.688948][ T1097] tty_ldisc_hangup+0x1c6/0x640 [ 778.693904][ T1097] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 778.700455][ T1097] ? put_tty_driver+0x20/0x20 [ 778.705137][ T1097] __tty_hangup.part.0+0x2fb/0x750 [ 778.710581][ T1097] tty_vhangup_session+0x25/0x30 [ 778.715523][ T1097] disassociate_ctty.part.0+0xb4/0x740 [ 778.721279][ T1097] disassociate_ctty+0x81/0xa0 [ 778.726143][ T1097] do_exit+0x1b42/0x2ef0 [ 778.730792][ T1097] ? __vfs_write+0x92/0x110 [ 778.735305][ T1097] ? mm_update_next_owner+0x7c0/0x7c0 [ 778.740991][ T1097] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 778.747545][ T1097] ? ksys_write+0x1cf/0x290 [ 778.752133][ T1097] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 778.757904][ T1097] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 778.763367][ T1097] do_group_exit+0x135/0x360 [ 778.771990][ T1097] __x64_sys_exit_group+0x44/0x50 [ 778.777301][ T1097] do_syscall_64+0xfa/0x790 [ 778.781814][ T1097] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 778.788939][ T1097] RIP: 0033:0x7fee9c9501e8 [ 778.793389][ T1097] Code: Bad RIP value. [ 778.797747][ T1097] RSP: 002b:00007ffd94c627a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 778.806161][ T1097] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fee9c9501e8 [ 778.814452][ T1097] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 778.822715][ T1097] RBP: 00007fee9cc25840 R08: 00000000000000e7 R09: ffffffffffffffa8 [ 778.831160][ T1097] R10: 00007fee9cc2b740 R11: 0000000000000246 R12: 00007fee9cc25840 [ 778.839401][ T1097] R13: 0000000000000001 R14: 0000000000000001 R15: 000000000060b798 [ 778.847676][ T1097] [ 778.847676][ T1097] Showing all locks held in the system: [ 778.855405][ T1097] 1 lock held by khungtaskd/1097: [ 778.860837][ T1097] #0: ffffffff899a4280 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 778.870489][ T1097] 1 lock held by rsyslogd/8779: [ 778.875332][ T1097] #0: ffff88809b7b9360 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 778.884321][ T1097] 2 locks held by getty/8870: [ 778.889276][ T1097] #0: ffff88808bec5090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 778.899579][ T1097] #1: ffffc9000198b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 778.909442][ T1097] 2 locks held by getty/8871: [ 778.914108][ T1097] #0: ffff88809f504090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 778.923439][ T1097] #1: ffffc9000196b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 778.933296][ T1097] 2 locks held by getty/8872: [ 778.938257][ T1097] #0: ffff888095ecd090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 778.947593][ T1097] #1: ffffc9000193b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 778.958121][ T1097] 2 locks held by getty/8873: [ 778.962784][ T1097] #0: ffff8880a0f4b090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 778.972038][ T1097] #1: ffffc9000195b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 778.981886][ T1097] 2 locks held by getty/8874: [ 778.986833][ T1097] #0: ffff8880a9023090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 778.995785][ T1097] #1: ffffc9000191b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 779.006301][ T1097] 2 locks held by getty/8875: [ 779.010981][ T1097] #0: ffff88809fc5b090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 779.020998][ T1097] #1: ffffc900018cb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 779.031865][ T1097] 2 locks held by login/9337: [ 779.036830][ T1097] #0: ffff8880a6b10198 (&tty->legacy_mutex){+.+.}, at: tty_lock+0xc7/0x130 [ 779.045520][ T1097] #1: ffff8880a6b10090 (&tty->ldisc_sem){++++}, at: ldsem_down_write+0x33/0x40 [ 779.054922][ T1097] 3 locks held by syz-executor376/9371: [ 779.060758][ T1097] #0: ffff8880a6b10090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 779.069992][ T1097] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 779.079684][ T1097] #2: ffff8880ae837398 (&rq->lock){-.-.}, at: __schedule+0x232/0x1f90 [ 779.088213][ T1097] [ 779.090534][ T1097] ============================================= [ 779.090534][ T1097] [ 779.099322][ T1097] NMI backtrace for cpu 1 [ 779.104096][ T1097] CPU: 1 PID: 1097 Comm: khungtaskd Not tainted 5.4.0-syzkaller #0 [ 779.111973][ T1097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 779.122105][ T1097] Call Trace: [ 779.125480][ T1097] dump_stack+0x197/0x210 [ 779.129827][ T1097] nmi_cpu_backtrace.cold+0x70/0xb2 [ 779.135070][ T1097] ? vprintk_func+0x86/0x189 [ 779.139709][ T1097] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 779.145341][ T1097] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 779.151324][ T1097] arch_trigger_cpumask_backtrace+0x14/0x20 [ 779.157214][ T1097] watchdog+0xb11/0x10c0 [ 779.161512][ T1097] kthread+0x361/0x430 [ 779.165581][ T1097] ? reset_hung_task_detector+0x30/0x30 [ 779.171164][ T1097] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 779.176884][ T1097] ret_from_fork+0x24/0x30 [ 779.181408][ T1097] Sending NMI from CPU 1 to CPUs 0: [ 779.187514][ C0] NMI backtrace for cpu 0 [ 779.187520][ C0] CPU: 0 PID: 9371 Comm: syz-executor376 Not tainted 5.4.0-syzkaller #0 [ 779.187526][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 779.187529][ C0] RIP: 0010:lock_release+0x4c0/0x960 [ 779.187540][ C0] Code: 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 8c 03 00 00 48 83 3d 87 5d 38 08 00 0f 84 7f 01 00 00 48 8b bd 48 ff ff ff 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 [ 779.187543][ C0] RSP: 0018:ffffc90001f275e0 EFLAGS: 00000086 [ 779.187550][ C0] RAX: 1ffffffff13266ab RBX: 1ffff920003e4ec1 RCX: 1ffff11014df5979 [ 779.187555][ C0] RDX: dffffc0000000000 RSI: 1ffff11014df598a RDI: 0000000000000086 [ 779.187560][ C0] RBP: ffffc90001f276b0 R08: 0000000000000004 R09: ffff8880a6facbd0 [ 779.187567][ C0] R10: fffffbfff14f21d8 R11: ffffffff8a790ec7 R12: ffff8880a6fac340 [ 779.187572][ C0] R13: ffffffff8158eadb R14: ffffc90001f27688 R15: ffff8880a6fac340 [ 779.187577][ C0] FS: 00000000014ed880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 779.187581][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 779.187586][ C0] CR2: ffffffffff600400 CR3: 000000009b70f000 CR4: 00000000001406f0 [ 779.187590][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 779.187595][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 779.187597][ C0] Call Trace: [ 779.187601][ C0] ? lock_downgrade+0x920/0x920 [ 779.187604][ C0] ? rcu_read_lock_held+0x9c/0xb0 [ 779.187607][ C0] ? __kasan_check_read+0x11/0x20 [ 779.187610][ C0] cpuacct_charge+0x1f3/0x360 [ 779.187613][ C0] update_curr+0x2f5/0x8d0 [ 779.187616][ C0] ? sched_clock+0x2e/0x50 [ 779.187619][ C0] pick_next_task_fair+0x221/0xc70 [ 779.187622][ C0] __schedule+0x375/0x1f90 [ 779.187626][ C0] ? __this_cpu_preempt_check+0x8a/0x190 [ 779.187629][ C0] ? __sched_text_start+0x8/0x8 [ 779.187632][ C0] ? paste_selection+0x2e2/0x460 [ 779.187634][ C0] schedule+0xdc/0x2b0 [ 779.187637][ C0] paste_selection+0x2f5/0x460 [ 779.187640][ C0] ? vcs_remove_sysfs+0x60/0x60 [ 779.187642][ C0] ? lock_downgrade+0x920/0x920 [ 779.187645][ C0] ? wake_up_q+0x140/0x140 [ 779.187647][ C0] tioclinux+0x133/0x480 [ 779.187650][ C0] vt_ioctl+0x1a41/0x26d0 [ 779.187653][ C0] ? complete_change_console+0x3a0/0x3a0 [ 779.187655][ C0] ? lock_downgrade+0x920/0x920 [ 779.187658][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 779.187661][ C0] ? tomoyo_path_number_perm+0x214/0x520 [ 779.187664][ C0] ? find_held_lock+0x35/0x130 [ 779.187667][ C0] ? tomoyo_path_number_perm+0x214/0x520 [ 779.187671][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 779.187674][ C0] ? tty_jobctrl_ioctl+0x50/0xd40 [ 779.187677][ C0] ? complete_change_console+0x3a0/0x3a0 [ 779.187679][ C0] tty_ioctl+0xa37/0x14f0 [ 779.187682][ C0] ? tty_vhangup+0x30/0x30 [ 779.187685][ C0] ? tomoyo_path_number_perm+0x454/0x520 [ 779.187688][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 779.187692][ C0] ? tomoyo_path_number_perm+0x25e/0x520 [ 779.187695][ C0] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 779.187698][ C0] ? tty_vhangup+0x30/0x30 [ 779.187700][ C0] do_vfs_ioctl+0x977/0x14e0 [ 779.187703][ C0] ? compat_ioctl_preallocate+0x220/0x220 [ 779.187706][ C0] ? kmem_cache_free+0x26b/0x320 [ 779.187709][ C0] ? putname+0xf4/0x130 [ 779.187711][ C0] ? do_sys_open+0x31d/0x5d0 [ 779.187714][ C0] ? tomoyo_file_ioctl+0x23/0x30 [ 779.187717][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 779.187720][ C0] ? security_file_ioctl+0x8d/0xc0 [ 779.187723][ C0] ksys_ioctl+0xab/0xd0 [ 779.187725][ C0] __x64_sys_ioctl+0x73/0xb0 [ 779.187728][ C0] do_syscall_64+0xfa/0x790 [ 779.187731][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 779.187734][ C0] RIP: 0033:0x441219 [ 779.187743][ C0] Code: e8 3c ad 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 779.187746][ C0] RSP: 002b:00007ffc1c5c34a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 779.187753][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441219 [ 779.187757][ C0] RDX: 00000000200000c0 RSI: 000000000000541c RDI: 0000000000000004 [ 779.187762][ C0] RBP: 000000000008a1ad R08: 000000000000000d R09: 00000000004002c8 [ 779.187766][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402040 [ 779.187770][ C0] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 779.191127][ T1097] Kernel panic - not syncing: hung_task: blocked tasks [ 779.632255][ T1097] CPU: 1 PID: 1097 Comm: khungtaskd Not tainted 5.4.0-syzkaller #0 [ 779.640132][ T1097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 779.650176][ T1097] Call Trace: [ 779.653644][ T1097] dump_stack+0x197/0x210 [ 779.657976][ T1097] panic+0x2e3/0x75c [ 779.661863][ T1097] ? add_taint.cold+0x16/0x16 [ 779.666531][ T1097] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 779.672262][ T1097] ? ___preempt_schedule+0x16/0x18 [ 779.677379][ T1097] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 779.683538][ T1097] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 779.689716][ T1097] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 779.695872][ T1097] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 779.702033][ T1097] watchdog+0xb22/0x10c0 [ 779.706284][ T1097] kthread+0x361/0x430 [ 779.710379][ T1097] ? reset_hung_task_detector+0x30/0x30 [ 779.715939][ T1097] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 779.721681][ T1097] ret_from_fork+0x24/0x30 [ 779.728315][ T1097] Kernel Offset: disabled [ 779.732655][ T1097] Rebooting in 86400 seconds..