[ 77.708248][ T27] audit: type=1400 audit(1577034415.819:38): avc: denied { watch } for pid=9974 comm="restorecond" path="/etc/selinux/restorecond.conf" dev="sda1" ino=2232 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 77.924897][ T27] audit: type=1800 audit(1577034416.049:39): pid=9879 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 77.946754][ T27] audit: type=1800 audit(1577034416.049:40): pid=9879 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 82.250282][ T27] audit: type=1400 audit(1577034420.369:41): avc: denied { map } for pid=10056 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 [ 683.165833][ T27] audit: type=1400 audit(1577035021.289:42): avc: denied { map } for pid=10064 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.10.8' (ECDSA) to the list of known hosts. executing program executing program executing program [ 696.971580][ T27] audit: type=1400 audit(1577035035.089:43): avc: denied { map } for pid=10071 comm="syz-executor491" path="/root/syz-executor491589289" dev="sda1" ino=2339 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 932.513962][ T1115] INFO: task login:10409 blocked for more than 143 seconds. [ 932.521434][ T1115] Not tainted 5.5.0-rc2-syzkaller #0 [ 932.528169][ T1115] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 932.537036][ T1115] login D27648 10409 1 0x80000002 [ 932.543380][ T1115] Call Trace: [ 932.546933][ T1115] __schedule+0x934/0x1f90 [ 932.551369][ T1115] ? __sched_text_start+0x8/0x8 [ 932.556459][ T1115] ? __lock_acquire+0x29c9/0x4a00 [ 932.561495][ T1115] schedule+0xdc/0x2b0 [ 932.565733][ T1115] schedule_timeout+0x717/0xc50 [ 932.570665][ T1115] ? __kasan_check_read+0x11/0x20 [ 932.575858][ T1115] ? usleep_range+0x170/0x170 [ 932.580541][ T1115] ? mark_held_locks+0xa4/0xf0 [ 932.585503][ T1115] ? _raw_spin_unlock_irq+0x23/0x80 [ 932.590751][ T1115] ? __ldsem_down_write_nested+0x3aa/0x8f0 [ 932.596853][ T1115] ? _raw_spin_unlock_irq+0x23/0x80 [ 932.602067][ T1115] ? lockdep_hardirqs_on+0x421/0x5e0 [ 932.608544][ T1115] ? trace_hardirqs_on+0x67/0x240 [ 932.613598][ T1115] __ldsem_down_write_nested+0x3b2/0x8f0 [ 932.619446][ T1115] ? ldsem_wake+0x40/0x40 [ 932.623998][ T1115] ? ___might_sleep+0x163/0x2c0 [ 932.628864][ T1115] ? put_tty_driver+0x20/0x20 [ 932.633541][ T1115] ldsem_down_write+0x33/0x40 [ 932.638397][ T1115] ? ldsem_down_write+0x33/0x40 [ 932.643256][ T1115] tty_ldisc_lock+0x66/0xb0 [ 932.647929][ T1115] tty_ldisc_hangup+0x1c6/0x640 [ 932.652840][ T1115] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 932.659282][ T1115] ? put_tty_driver+0x20/0x20 [ 932.664930][ T1115] __tty_hangup.part.0+0x2fb/0x750 [ 932.670066][ T1115] tty_vhangup_session+0x25/0x30 [ 932.675158][ T1115] disassociate_ctty.part.0+0xb4/0x740 [ 932.680622][ T1115] disassociate_ctty+0x81/0xa0 [ 932.685784][ T1115] do_exit+0x1b42/0x2ef0 [ 932.690057][ T1115] ? __vfs_write+0x92/0x110 [ 932.694722][ T1115] ? mm_update_next_owner+0x7c0/0x7c0 [ 932.700104][ T1115] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 932.706490][ T1115] ? ksys_write+0x1cf/0x290 [ 932.711048][ T1115] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 932.716672][ T1115] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 932.722139][ T1115] do_group_exit+0x135/0x360 [ 932.726882][ T1115] __x64_sys_exit_group+0x44/0x50 [ 932.731913][ T1115] do_syscall_64+0xfa/0x790 [ 932.737498][ T1115] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 932.743392][ T1115] RIP: 0033:0x7fada16df1e8 [ 932.747980][ T1115] Code: Bad RIP value. [ 932.752067][ T1115] RSP: 002b:00007ffc09aee828 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 932.760707][ T1115] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fada16df1e8 [ 932.768855][ T1115] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 932.777035][ T1115] RBP: 00007fada19b4840 R08: 00000000000000e7 R09: ffffffffffffffa8 [ 932.785283][ T1115] R10: 00007fada19ba740 R11: 0000000000000246 R12: 00007fada19b4840 [ 932.793261][ T1115] R13: 0000000000000001 R14: 0000000000000001 R15: 000000000060b798 [ 932.801442][ T1115] [ 932.801442][ T1115] Showing all locks held in the system: [ 932.809309][ T1115] 1 lock held by khungtaskd/1115: [ 932.814487][ T1115] #0: ffffffff899a5680 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 932.823959][ T1115] 3 locks held by rs:main Q:Reg/9915: [ 932.829325][ T1115] #0: ffff8880ae937358 (&rq->lock){-.-.}, at: __schedule+0x232/0x1f90 [ 932.837915][ T1115] #1: ffff8882149b2428 (sb_writers#4){.+.+}, at: vfs_write+0x485/0x5d0 [ 932.846426][ T1115] #2: ffff8880989c57c8 (&sb->s_type->i_mutex_key#10){+.+.}, at: ext4_buffered_write_iter+0xba/0x460 [ 932.857593][ T1115] 1 lock held by rsyslogd/9917: [ 932.862440][ T1115] #0: ffff888092c83ba0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 932.872254][ T1115] 2 locks held by getty/10040: [ 932.877168][ T1115] #0: ffff8880a356d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 932.886265][ T1115] #1: ffffc900018532e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 932.896153][ T1115] 2 locks held by getty/10041: [ 932.900906][ T1115] #0: ffff88809f899090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 932.910012][ T1115] #1: ffffc900017c32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 932.919745][ T1115] 2 locks held by getty/10042: [ 932.924633][ T1115] #0: ffff888088459090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 932.933582][ T1115] #1: ffffc900018232e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 932.943322][ T1115] 2 locks held by getty/10043: [ 932.948209][ T1115] #0: ffff8880a2afc090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 932.957303][ T1115] #1: ffffc900018432e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 932.966998][ T1115] 2 locks held by getty/10044: [ 932.971751][ T1115] #0: ffff88809f129090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 932.980889][ T1115] #1: ffffc900018332e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 932.990590][ T1115] 2 locks held by getty/10045: [ 932.996443][ T1115] #0: ffff888099fbb090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 933.005524][ T1115] #1: ffffc900011302e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 933.015245][ T1115] 2 locks held by login/10409: [ 933.020001][ T1115] #0: ffff8880a3bc8198 (&tty->legacy_mutex){+.+.}, at: tty_lock+0xc7/0x130 [ 933.028838][ T1115] #1: ffff8880a3bc8090 (&tty->ldisc_sem){++++}, at: ldsem_down_write+0x33/0x40 [ 933.038022][ T1115] 2 locks held by syz-executor491/10498: [ 933.043644][ T1115] #0: ffff8880a3bc8090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 933.052766][ T1115] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 933.062348][ T1115] [ 933.064821][ T1115] ============================================= [ 933.064821][ T1115] [ 933.073490][ T1115] NMI backtrace for cpu 0 [ 933.077872][ T1115] CPU: 0 PID: 1115 Comm: khungtaskd Not tainted 5.5.0-rc2-syzkaller #0 [ 933.086107][ T1115] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 933.096154][ T1115] Call Trace: [ 933.099522][ T1115] dump_stack+0x197/0x210 [ 933.103862][ T1115] nmi_cpu_backtrace.cold+0x70/0xb2 [ 933.109086][ T1115] ? vprintk_func+0x86/0x189 [ 933.113731][ T1115] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 933.119364][ T1115] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 933.125351][ T1115] arch_trigger_cpumask_backtrace+0x14/0x20 [ 933.131241][ T1115] watchdog+0xb11/0x10c0 [ 933.135522][ T1115] kthread+0x361/0x430 [ 933.139590][ T1115] ? reset_hung_task_detector+0x30/0x30 [ 933.145131][ T1115] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 933.150860][ T1115] ret_from_fork+0x24/0x30 [ 933.155383][ T1115] Sending NMI from CPU 0 to CPUs 1: [ 933.161302][ C1] NMI backtrace for cpu 1 [ 933.161309][ C1] CPU: 1 PID: 10498 Comm: syz-executor491 Not tainted 5.5.0-rc2-syzkaller #0 [ 933.161315][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 933.161319][ C1] RIP: 0010:lock_is_held_type+0x272/0x320 [ 933.161331][ C1] Code: ff df c7 83 94 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 88 00 00 00 48 83 3d be ca 38 08 00 74 31 48 8b 7d c0 57 9d <0f> 1f 44 00 00 48 83 c4 20 44 89 e0 5b 41 5c 41 5d 41 5e 41 5f 5d [ 933.161335][ C1] RSP: 0018:ffffc90003107668 EFLAGS: 00000086 [ 933.161342][ C1] RAX: 1ffffffff132669b RBX: ffff8880a90b61c0 RCX: ffff8880a90b6a58 [ 933.161348][ C1] RDX: dffffc0000000000 RSI: ffffffff899c8380 RDI: 0000000000000086 [ 933.161353][ C1] RBP: ffffc900031076b0 R08: 1ffff11015d2703c R09: ffffed1015d2703d [ 933.161358][ C1] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 0000000000000000 [ 933.161363][ C1] R13: ffff8880a90b6ad0 R14: ffffffff899c8380 R15: 0000000000000004 [ 933.161368][ C1] FS: 00000000010b1880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 933.161373][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 933.161378][ C1] CR2: 00000000006cc080 CR3: 000000009f232000 CR4: 00000000001406e0 [ 933.161383][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 933.161388][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 933.161390][ C1] Call Trace: [ 933.161394][ C1] cpuacct_charge+0x26e/0x360 [ 933.161397][ C1] update_curr+0x2f5/0x8d0 [ 933.161400][ C1] ? sched_clock+0x2e/0x50 [ 933.161404][ C1] pick_next_task_fair+0x221/0xc70 [ 933.161407][ C1] __schedule+0x375/0x1f90 [ 933.161410][ C1] ? __sched_text_start+0x8/0x8 [ 933.161413][ C1] ? paste_selection+0x2f0/0x460 [ 933.161417][ C1] ? preempt_count_add+0xa4/0x160 [ 933.161420][ C1] schedule+0xdc/0x2b0 [ 933.161423][ C1] paste_selection+0x2f5/0x460 [ 933.161426][ C1] ? vcs_remove_sysfs+0x60/0x60 [ 933.161430][ C1] ? lock_downgrade+0x920/0x920 [ 933.161433][ C1] ? wake_up_q+0x140/0x140 [ 933.161436][ C1] tioclinux+0x133/0x480 [ 933.161439][ C1] vt_ioctl+0x1a41/0x26d0 [ 933.161443][ C1] ? complete_change_console+0x3a0/0x3a0 [ 933.161446][ C1] ? lock_downgrade+0x920/0x920 [ 933.161450][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 933.161454][ C1] ? tomoyo_path_number_perm+0x214/0x520 [ 933.161457][ C1] ? find_held_lock+0x35/0x130 [ 933.161461][ C1] ? tomoyo_path_number_perm+0x214/0x520 [ 933.161465][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 933.161468][ C1] ? tty_jobctrl_ioctl+0x50/0xd40 [ 933.161472][ C1] ? complete_change_console+0x3a0/0x3a0 [ 933.161475][ C1] tty_ioctl+0xa37/0x14f0 [ 933.161478][ C1] ? tty_vhangup+0x30/0x30 [ 933.161482][ C1] ? tomoyo_path_number_perm+0x454/0x520 [ 933.161486][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 933.161490][ C1] ? tomoyo_path_number_perm+0x25e/0x520 [ 933.161494][ C1] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 933.161497][ C1] ? ___might_sleep+0x163/0x2c0 [ 933.161500][ C1] ? tty_vhangup+0x30/0x30 [ 933.161504][ C1] do_vfs_ioctl+0x977/0x14e0 [ 933.161507][ C1] ? compat_ioctl_preallocate+0x220/0x220 [ 933.161511][ C1] ? selinux_file_mprotect+0x620/0x620 [ 933.161514][ C1] ? __kasan_check_write+0x14/0x20 [ 933.161518][ C1] ? tomoyo_file_ioctl+0x23/0x30 [ 933.161522][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 933.161526][ C1] ? security_file_ioctl+0x8d/0xc0 [ 933.161528][ C1] ksys_ioctl+0xab/0xd0 [ 933.161532][ C1] __x64_sys_ioctl+0x73/0xb0 [ 933.161535][ C1] do_syscall_64+0xfa/0x790 [ 933.161539][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 933.161542][ C1] RIP: 0033:0x441219 [ 933.161553][ C1] 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 [ 933.161557][ C1] RSP: 002b:00007ffdd3075288 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 933.161566][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441219 [ 933.161571][ C1] RDX: 0000000020000040 RSI: 000000000000541c RDI: 0000000000000003 [ 933.161576][ C1] RBP: 00000000000afb69 R08: 000000000000000d R09: 00000000004002c8 [ 933.161581][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402040 [ 933.161585][ C1] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 933.163514][ T1115] Kernel panic - not syncing: hung_task: blocked tasks [ 933.591745][ T1115] CPU: 0 PID: 1115 Comm: khungtaskd Not tainted 5.5.0-rc2-syzkaller #0 [ 933.599971][ T1115] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 933.610020][ T1115] Call Trace: [ 933.613314][ T1115] dump_stack+0x197/0x210 [ 933.617646][ T1115] panic+0x2e3/0x75c [ 933.621539][ T1115] ? add_taint.cold+0x16/0x16 [ 933.626213][ T1115] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 933.631844][ T1115] ? ___preempt_schedule+0x16/0x18 [ 933.636960][ T1115] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 933.643134][ T1115] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 933.649288][ T1115] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 933.655444][ T1115] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 933.661600][ T1115] watchdog+0xb22/0x10c0 [ 933.665854][ T1115] kthread+0x361/0x430 [ 933.669936][ T1115] ? reset_hung_task_detector+0x30/0x30 [ 933.675486][ T1115] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 933.681222][ T1115] ret_from_fork+0x24/0x30 [ 933.687043][ T1115] Kernel Offset: disabled [ 933.691375][ T1115] Rebooting in 86400 seconds..