Warning: Permanently added '10.128.1.30' (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 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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 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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 syzkaller login: [ 674.442169][ T1112] INFO: task kworker/u4:2:24 blocked for more than 143 seconds. [ 674.450308][ T1112] Not tainted 5.5.0-rc1-syzkaller #0 [ 674.456878][ T1112] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 674.465880][ T1112] kworker/u4:2 D24104 24 2 0x80004000 [ 674.478086][ T1112] Workqueue: events_unbound flush_to_ldisc [ 674.484359][ T1112] Call Trace: [ 674.487713][ T1112] __schedule+0x934/0x1f90 [ 674.492578][ T1112] ? __sched_text_start+0x8/0x8 [ 674.497520][ T1112] ? lock_downgrade+0x920/0x920 [ 674.502840][ T1112] ? rwlock_bug.part.0+0x90/0x90 [ 674.507850][ T1112] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 674.515449][ T1112] ? kthread_data+0x58/0xc0 [ 674.519972][ T1112] schedule+0xdc/0x2b0 [ 674.524395][ T1112] schedule_preempt_disabled+0x13/0x20 [ 674.529863][ T1112] __mutex_lock+0x7ab/0x13c0 [ 674.534787][ T1112] ? flush_to_ldisc+0x3d/0x390 [ 674.539561][ T1112] ? mutex_trylock+0x2f0/0x2f0 [ 674.544724][ T1112] mutex_lock_nested+0x16/0x20 [ 674.549495][ T1112] ? mutex_lock_nested+0x16/0x20 [ 674.554910][ T1112] flush_to_ldisc+0x3d/0x390 [ 674.559572][ T1112] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 674.565472][ T1112] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 674.571473][ T1112] ? trace_hardirqs_on+0x67/0x240 [ 674.576880][ T1112] process_one_work+0x9af/0x1740 [ 674.581854][ T1112] ? pwq_dec_nr_in_flight+0x320/0x320 [ 674.587551][ T1112] ? lock_acquire+0x190/0x410 [ 674.592538][ T1112] worker_thread+0x98/0xe40 [ 674.597047][ T1112] ? trace_hardirqs_on+0x67/0x240 [ 674.602366][ T1112] kthread+0x361/0x430 [ 674.606451][ T1112] ? process_one_work+0x1740/0x1740 [ 674.611647][ T1112] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 674.617947][ T1112] ret_from_fork+0x24/0x30 [ 674.622789][ T1112] INFO: task login:9609 blocked for more than 143 seconds. [ 674.633217][ T1112] Not tainted 5.5.0-rc1-syzkaller #0 [ 674.639019][ T1112] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 674.648899][ T1112] login D27648 9609 1 0x00000004 [ 674.655552][ T1112] Call Trace: [ 674.658892][ T1112] __schedule+0x934/0x1f90 [ 674.663726][ T1112] ? __sched_text_start+0x8/0x8 [ 674.668600][ T1112] ? __lock_acquire+0x29c9/0x4a00 [ 674.674054][ T1112] schedule+0xdc/0x2b0 [ 674.678232][ T1112] schedule_timeout+0x717/0xc50 [ 674.683584][ T1112] ? __kasan_check_read+0x11/0x20 [ 674.688643][ T1112] ? usleep_range+0x170/0x170 [ 674.693658][ T1112] ? mark_held_locks+0xa4/0xf0 [ 674.698428][ T1112] ? _raw_spin_unlock_irq+0x23/0x80 [ 674.703947][ T1112] ? wait_for_completion+0x294/0x440 [ 674.709233][ T1112] ? _raw_spin_unlock_irq+0x23/0x80 [ 674.714857][ T1112] ? lockdep_hardirqs_on+0x421/0x5e0 [ 674.720165][ T1112] ? trace_hardirqs_on+0x67/0x240 [ 674.725537][ T1112] wait_for_completion+0x29c/0x440 [ 674.730657][ T1112] ? wait_for_completion_interruptible+0x470/0x470 [ 674.737650][ T1112] ? wake_up_q+0x140/0x140 [ 674.742375][ T1112] ? lockdep_hardirqs_on+0x421/0x5e0 [ 674.747676][ T1112] ? __kasan_check_read+0x11/0x20 [ 674.753105][ T1112] __flush_work+0x4fe/0xa50 [ 674.757637][ T1112] ? queue_delayed_work_on+0x210/0x210 [ 674.763544][ T1112] ? init_pwq+0x360/0x360 [ 674.767902][ T1112] ? up_read+0x1cd/0x810 [ 674.773442][ T1112] ? down_read_non_owner+0x490/0x490 [ 674.778780][ T1112] flush_work+0x18/0x20 [ 674.783310][ T1112] tty_buffer_flush_work+0x16/0x20 [ 674.788429][ T1112] n_tty_read+0xaea/0x1bf0 [ 674.793301][ T1112] ? ldsem_down_read+0x33/0x40 [ 674.798072][ T1112] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 674.804200][ T1112] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 674.810447][ T1112] ? __ldsem_down_read_nested+0x104/0x800 [ 674.816508][ T1112] ? tty_ldisc_deref+0x35/0x40 [ 674.821281][ T1112] ? __ldsem_down_write_nested+0x8f0/0x8f0 [ 674.827535][ T1112] ? copy_from_read_buf+0x4f0/0x4f0 [ 674.833053][ T1112] ? prepare_to_wait_exclusive+0x320/0x320 [ 674.838887][ T1112] ? ldsem_down_read+0x33/0x40 [ 674.844124][ T1112] ? ldsem_down_read+0x33/0x40 [ 674.848904][ T1112] tty_read+0x1a0/0x2a0 [ 674.853442][ T1112] ? copy_from_read_buf+0x4f0/0x4f0 [ 674.858756][ T1112] __vfs_read+0x8a/0x110 [ 674.863382][ T1112] ? tty_poll+0x190/0x190 [ 674.867731][ T1112] vfs_read+0x1f0/0x440 [ 674.871892][ T1112] ksys_read+0x14f/0x290 [ 674.876498][ T1112] ? kernel_write+0x130/0x130 [ 674.881238][ T1112] ? do_syscall_64+0x26/0x790 [ 674.886270][ T1112] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 674.892635][ T1112] ? do_syscall_64+0x26/0x790 [ 674.897329][ T1112] __x64_sys_read+0x73/0xb0 [ 674.901833][ T1112] do_syscall_64+0xfa/0x790 [ 674.907617][ T1112] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 674.913797][ T1112] RIP: 0033:0x7f6202982310 [ 674.918246][ T1112] Code: Bad RIP value. [ 674.922600][ T1112] RSP: 002b:00007ffe08871a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 674.931011][ T1112] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6202982310 [ 674.939743][ T1112] RDX: 00000000000001ff RSI: 00007ffe08871cf0 RDI: 0000000000000000 [ 674.948037][ T1112] RBP: 0000000000000000 R08: 00007f6203265700 R09: 0000000000000000 [ 674.956426][ T1112] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe08871cf0 [ 674.964712][ T1112] R13: 0000000000000000 R14: 0000000000000001 R15: 000000000060b798 [ 674.973011][ T1112] [ 674.973011][ T1112] Showing all locks held in the system: [ 674.980734][ T1112] 3 locks held by kworker/u4:2/24: [ 674.986290][ T1112] #0: ffff8880aa433928 ((wq_completion)events_unbound){+.+.}, at: process_one_work+0x88b/0x1740 [ 674.997108][ T1112] #1: ffffc90000e17dc0 ((work_completion)(&buf->work)){+.+.}, at: process_one_work+0x8c1/0x1740 [ 675.008003][ T1112] #2: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: flush_to_ldisc+0x3d/0x390 [ 675.016828][ T1112] 1 lock held by khungtaskd/1112: [ 675.021846][ T1112] #0: ffffffff899a56c0 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 675.031591][ T1112] 1 lock held by rsyslogd/9079: [ 675.037623][ T1112] #0: ffff8880962650e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 675.046583][ T1112] 2 locks held by getty/9170: [ 675.051250][ T1112] #0: ffff8880a7af2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 675.060486][ T1112] #1: ffffc9000182b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 675.070342][ T1112] 2 locks held by getty/9171: [ 675.075298][ T1112] #0: ffff88809ba38090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 675.084685][ T1112] #1: ffffc9000184b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 675.094548][ T1112] 2 locks held by getty/9172: [ 675.099216][ T1112] #0: ffff88808fc60090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 675.108536][ T1112] #1: ffffc9000181b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 675.118408][ T1112] 2 locks held by getty/9173: [ 675.123349][ T1112] #0: ffff8880928a3090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 675.132577][ T1112] #1: ffffc9000183b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 675.142438][ T1112] 2 locks held by getty/9174: [ 675.147106][ T1112] #0: ffff8880a30e4090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 675.156394][ T1112] #1: ffffc900017eb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 675.167201][ T1112] 2 locks held by getty/9175: [ 675.171872][ T1112] #0: ffff8880a79aa090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 675.181139][ T1112] #1: ffffc9000178b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 675.191014][ T1112] 2 locks held by login/9609: [ 675.195962][ T1112] #0: ffff8880a2673090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 675.205217][ T1112] #1: ffffc9000185b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 675.215072][ T1112] 3 locks held by syz-executor065/9634: [ 675.220606][ T1112] #0: ffff8880a2673090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 675.230050][ T1112] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 675.239752][ T1112] #2: ffff8880ae837358 (&rq->lock){-.-.}, at: __schedule+0x232/0x1f90 [ 675.248592][ T1112] [ 675.250934][ T1112] ============================================= [ 675.250934][ T1112] [ 675.260021][ T1112] NMI backtrace for cpu 1 [ 675.264449][ T1112] CPU: 1 PID: 1112 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 675.272704][ T1112] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 675.282764][ T1112] Call Trace: [ 675.286152][ T1112] dump_stack+0x197/0x210 [ 675.290494][ T1112] nmi_cpu_backtrace.cold+0x70/0xb2 [ 675.295719][ T1112] ? vprintk_func+0x86/0x189 [ 675.300355][ T1112] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 675.305987][ T1112] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 675.311981][ T1112] arch_trigger_cpumask_backtrace+0x14/0x20 [ 675.317872][ T1112] watchdog+0xb11/0x10c0 [ 675.322118][ T1112] kthread+0x361/0x430 [ 675.326190][ T1112] ? reset_hung_task_detector+0x30/0x30 [ 675.331732][ T1112] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 675.337509][ T1112] ret_from_fork+0x24/0x30 [ 675.342120][ T1112] Sending NMI from CPU 1 to CPUs 0: [ 675.348204][ C0] NMI backtrace for cpu 0 [ 675.348210][ C0] CPU: 0 PID: 9634 Comm: syz-executor065 Not tainted 5.5.0-rc1-syzkaller #0 [ 675.348216][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 675.348219][ C0] RIP: 0010:__rcu_read_unlock+0x7c/0x710 [ 675.348229][ C0] Code: fd ff ff 3f 41 8d 47 ff 81 f9 fd ff ff 3f 41 89 86 78 03 00 00 0f 86 ac 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <48> b8 00 00 00 00 00 fc ff df 4c 89 e6 48 c1 ee 03 0f b6 04 06 84 [ 675.348233][ C0] RSP: 0018:ffffc90001a976b0 EFLAGS: 00000046 [ 675.348239][ C0] RAX: 0000000000000000 RBX: ffff8880a77d04c0 RCX: 1ffff11014efa0f7 [ 675.348244][ C0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880ae8381e0 [ 675.348248][ C0] RBP: ffffc90001a976f0 R08: 1ffff11015d0703c R09: ffffed1015d0703d [ 675.348252][ C0] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880a77d07b8 [ 675.348256][ C0] R13: ffffffff899c5cf0 R14: ffff8880a77d0440 R15: 0000000000000001 [ 675.348261][ C0] FS: 0000000001845880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 675.348265][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 675.348269][ C0] CR2: ffffffffff600400 CR3: 00000000a9307000 CR4: 00000000001406f0 [ 675.348274][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 675.348278][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 675.348280][ C0] Call Trace: [ 675.348283][ C0] ? __kasan_check_read+0x11/0x20 [ 675.348287][ C0] ? rcu_dynticks_curr_cpu_in_eqs+0x54/0xb0 [ 675.348290][ C0] update_curr+0x3e5/0x8d0 [ 675.348292][ C0] ? sched_clock+0x2e/0x50 [ 675.348296][ C0] pick_next_task_fair+0x221/0xc70 [ 675.348298][ C0] __schedule+0x375/0x1f90 [ 675.348301][ C0] ? __sched_text_start+0x8/0x8 [ 675.348304][ C0] schedule+0xdc/0x2b0 [ 675.348307][ C0] paste_selection+0x2f5/0x460 [ 675.348310][ C0] ? vcs_remove_sysfs+0x60/0x60 [ 675.348313][ C0] ? lock_downgrade+0x920/0x920 [ 675.348316][ C0] ? wake_up_q+0x140/0x140 [ 675.348318][ C0] tioclinux+0x133/0x480 [ 675.348321][ C0] vt_ioctl+0x1a41/0x26d0 [ 675.348324][ C0] ? complete_change_console+0x3a0/0x3a0 [ 675.348327][ C0] ? lock_downgrade+0x920/0x920 [ 675.348330][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 675.348334][ C0] ? tomoyo_path_number_perm+0x214/0x520 [ 675.348337][ C0] ? find_held_lock+0x35/0x130 [ 675.348340][ C0] ? tomoyo_path_number_perm+0x214/0x520 [ 675.348343][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 675.348346][ C0] ? tty_jobctrl_ioctl+0x50/0xd40 [ 675.348350][ C0] ? complete_change_console+0x3a0/0x3a0 [ 675.348352][ C0] tty_ioctl+0xa37/0x14f0 [ 675.348355][ C0] ? tty_vhangup+0x30/0x30 [ 675.348359][ C0] ? tomoyo_path_number_perm+0x454/0x520 [ 675.348362][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 675.348365][ C0] ? tomoyo_path_number_perm+0x25e/0x520 [ 675.348369][ C0] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 675.348372][ C0] ? __do_page_fault+0x56a/0xd80 [ 675.348375][ C0] ? tty_vhangup+0x30/0x30 [ 675.348377][ C0] do_vfs_ioctl+0x977/0x14e0 [ 675.348381][ C0] ? compat_ioctl_preallocate+0x220/0x220 [ 675.348384][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 675.348388][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 675.348391][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 675.348394][ C0] ? tomoyo_file_ioctl+0x23/0x30 [ 675.348398][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 675.348401][ C0] ? security_file_ioctl+0x8d/0xc0 [ 675.348403][ C0] ksys_ioctl+0xab/0xd0 [ 675.348406][ C0] __x64_sys_ioctl+0x73/0xb0 [ 675.348409][ C0] do_syscall_64+0xfa/0x790 [ 675.348413][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 675.348415][ C0] RIP: 0033:0x441209 [ 675.348424][ 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 [ 675.348427][ C0] RSP: 002b:00007ffe7c0d3a88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 675.348434][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441209 [ 675.348439][ C0] RDX: 0000000020000080 RSI: 000000000000541c RDI: 0000000000000003 [ 675.348443][ C0] RBP: 00000000000808bc R08: 00000000004002c8 R09: 00000000004002c8 [ 675.348446][ C0] R10: 000000000000000d R11: 0000000000000246 R12: 0000000000402030 [ 675.348450][ C0] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 675.357515][ T1112] Kernel panic - not syncing: hung_task: blocked tasks [ 675.784397][ T1112] CPU: 1 PID: 1112 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 675.792640][ T1112] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 675.802687][ T1112] Call Trace: [ 675.805989][ T1112] dump_stack+0x197/0x210 [ 675.810480][ T1112] panic+0x2e3/0x75c [ 675.814380][ T1112] ? add_taint.cold+0x16/0x16 [ 675.819141][ T1112] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 675.824797][ T1112] ? ___preempt_schedule+0x16/0x18 [ 675.829936][ T1112] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 675.836096][ T1112] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 675.842255][ T1112] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 675.848414][ T1112] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 675.854603][ T1112] watchdog+0xb22/0x10c0 [ 675.858861][ T1112] kthread+0x361/0x430 [ 675.862931][ T1112] ? reset_hung_task_detector+0x30/0x30 [ 675.868474][ T1112] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 675.874195][ T1112] ret_from_fork+0x24/0x30 [ 675.880463][ T1112] Kernel Offset: disabled [ 675.884900][ T1112] Rebooting in 86400 seconds..