[ 77.705487][ T27] audit: type=1400 audit(1576027879.341:37): avc: denied { watch } for pid=9753 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [ 77.742903][ T27] audit: type=1400 audit(1576027879.351:38): avc: denied { watch } for pid=9753 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 file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 78.118562][ T27] audit: type=1800 audit(1576027879.761:39): pid=9663 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 [ 78.140780][ T27] audit: type=1800 audit(1576027879.761:40): pid=9663 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: [ 82.505125][ T27] audit: type=1400 audit(1576027884.141:41): avc: denied { map } for pid=9841 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 Warning: Permanently added '10.128.1.31' (ECDSA) to the list of known hosts. executing program executing program executing program [ 558.762419][ T27] audit: type=1400 audit(1576028360.401:42): avc: denied { map } for pid=9853 comm="syz-executor386" path="/root/syz-executor386909189" dev="sda1" ino=1426 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 788.664868][ T1113] INFO: task login:10303 blocked for more than 143 seconds. [ 788.672409][ T1113] Not tainted 5.5.0-rc1-syzkaller #0 [ 788.679804][ T1113] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 788.688964][ T1113] login D27648 10303 1 0x80000002 [ 788.700364][ T1113] Call Trace: [ 788.703750][ T1113] __schedule+0x934/0x1f90 [ 788.708585][ T1113] ? __sched_text_start+0x8/0x8 [ 788.713473][ T1113] ? __lock_acquire+0x29c9/0x4a00 [ 788.718897][ T1113] schedule+0xdc/0x2b0 [ 788.722973][ T1113] schedule_timeout+0x717/0xc50 [ 788.728261][ T1113] ? __kasan_check_read+0x11/0x20 [ 788.733297][ T1113] ? usleep_range+0x170/0x170 [ 788.738402][ T1113] ? mark_held_locks+0xa4/0xf0 [ 788.743228][ T1113] ? _raw_spin_unlock_irq+0x23/0x80 [ 788.748938][ T1113] ? __ldsem_down_write_nested+0x3aa/0x8f0 [ 788.755110][ T1113] ? _raw_spin_unlock_irq+0x23/0x80 [ 788.760314][ T1113] ? lockdep_hardirqs_on+0x421/0x5e0 [ 788.766009][ T1113] ? trace_hardirqs_on+0x67/0x240 [ 788.771061][ T1113] __ldsem_down_write_nested+0x3b2/0x8f0 [ 788.777319][ T1113] ? ldsem_wake+0x40/0x40 [ 788.781709][ T1113] ? ___might_sleep+0x163/0x2c0 [ 788.786927][ T1113] ? put_tty_driver+0x20/0x20 [ 788.791607][ T1113] ldsem_down_write+0x33/0x40 [ 788.796795][ T1113] ? ldsem_down_write+0x33/0x40 [ 788.801654][ T1113] tty_ldisc_lock+0x66/0xb0 [ 788.807433][ T1113] tty_ldisc_hangup+0x1c6/0x640 [ 788.812378][ T1113] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 788.819012][ T1113] ? put_tty_driver+0x20/0x20 [ 788.823694][ T1113] __tty_hangup.part.0+0x2fb/0x750 [ 788.829295][ T1113] tty_vhangup_session+0x25/0x30 [ 788.834252][ T1113] disassociate_ctty.part.0+0xb4/0x740 [ 788.840323][ T1113] disassociate_ctty+0x81/0xa0 [ 788.849458][ T1113] do_exit+0x1b42/0x2ef0 [ 788.853752][ T1113] ? __vfs_write+0x92/0x110 [ 788.858706][ T1113] ? mm_update_next_owner+0x7c0/0x7c0 [ 788.864087][ T1113] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 788.870716][ T1113] ? ksys_write+0x1cf/0x290 [ 788.875822][ T1113] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 788.881329][ T1113] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 788.887236][ T1113] do_group_exit+0x135/0x360 [ 788.891878][ T1113] __x64_sys_exit_group+0x44/0x50 [ 788.897252][ T1113] do_syscall_64+0xfa/0x790 [ 788.901765][ T1113] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 788.907973][ T1113] RIP: 0033:0x7f24f80d71e8 [ 788.912460][ T1113] Code: Bad RIP value. [ 788.917037][ T1113] RSP: 002b:00007ffc17a24d28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 788.925863][ T1113] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f24f80d71e8 [ 788.933836][ T1113] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 788.943091][ T1113] RBP: 00007f24f83ac840 R08: 00000000000000e7 R09: ffffffffffffffa8 [ 788.951355][ T1113] R10: 00007f24f83b2740 R11: 0000000000000246 R12: 00007f24f83ac840 [ 788.959616][ T1113] R13: 0000000000000001 R14: 0000000000000001 R15: 000000000060b798 [ 788.967887][ T1113] [ 788.967887][ T1113] Showing all locks held in the system: [ 788.975934][ T1113] 1 lock held by khungtaskd/1113: [ 788.980965][ T1113] #0: ffffffff899a56c0 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 788.990653][ T1113] 1 lock held by rsyslogd/9701: [ 788.995793][ T1113] #0: ffff88809f633660 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 789.004514][ T1113] 2 locks held by getty/9824: [ 789.009536][ T1113] #0: ffff88809a4a2090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 789.018836][ T1113] #1: ffffc900019d32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 789.028740][ T1113] 2 locks held by getty/9825: [ 789.033409][ T1113] #0: ffff88808d916090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 789.042754][ T1113] #1: ffffc900019e32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 789.052811][ T1113] 2 locks held by getty/9826: [ 789.057775][ T1113] #0: ffff88809f051090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 789.067946][ T1113] #1: ffffc900019b32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 789.077820][ T1113] 2 locks held by getty/9827: [ 789.082491][ T1113] #0: ffff88807fffc090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 789.091860][ T1113] #1: ffffc900019632e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 789.101827][ T1113] 2 locks held by getty/9828: [ 789.106795][ T1113] #0: ffff88809f058090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 789.116042][ T1113] #1: ffffc900019c32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 789.125891][ T1113] 2 locks held by getty/9829: [ 789.130562][ T1113] #0: ffff8880a697b090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 789.139858][ T1113] #1: ffffc900019232e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 789.149751][ T1113] 2 locks held by login/10303: [ 789.154508][ T1113] #0: ffff8880a8153198 (&tty->legacy_mutex){+.+.}, at: tty_lock+0xc7/0x130 [ 789.163548][ T1113] #1: ffff8880a8153090 (&tty->ldisc_sem){++++}, at: ldsem_down_write+0x33/0x40 [ 789.172906][ T1113] 4 locks held by syz-executor386/10354: [ 789.178828][ T1113] #0: ffff8880a8153090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 789.188064][ T1113] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 789.198714][ T1113] #2: ffff8880ae937358 (&rq->lock){-.-.}, at: __schedule+0x232/0x1f90 [ 789.207261][ T1113] #3: ffffffff899a56c0 (rcu_read_lock){....}, at: update_curr+0x2ea/0x8d0 [ 789.216257][ T1113] [ 789.218587][ T1113] ============================================= [ 789.218587][ T1113] [ 789.227472][ T1113] NMI backtrace for cpu 0 [ 789.231836][ T1113] CPU: 0 PID: 1113 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 789.240085][ T1113] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 789.250148][ T1113] Call Trace: [ 789.253584][ T1113] dump_stack+0x197/0x210 [ 789.257926][ T1113] nmi_cpu_backtrace.cold+0x70/0xb2 [ 789.263196][ T1113] ? vprintk_func+0x86/0x189 [ 789.267843][ T1113] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 789.273502][ T1113] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 789.279510][ T1113] arch_trigger_cpumask_backtrace+0x14/0x20 [ 789.285420][ T1113] watchdog+0xb11/0x10c0 [ 789.289714][ T1113] kthread+0x361/0x430 [ 789.293817][ T1113] ? reset_hung_task_detector+0x30/0x30 [ 789.299372][ T1113] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 789.305129][ T1113] ret_from_fork+0x24/0x30 [ 789.309679][ T1113] Sending NMI from CPU 0 to CPUs 1: [ 789.315774][ C1] NMI backtrace for cpu 1 [ 789.315780][ C1] CPU: 1 PID: 10354 Comm: syz-executor386 Not tainted 5.5.0-rc1-syzkaller #0 [ 789.315786][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 789.315789][ C1] RIP: 0010:pick_next_entity+0x1a8/0x3f0 [ 789.315800][ C1] Code: 8b 7f 58 4c 89 ee e8 c7 fd ff ff 85 c0 7e 53 4c 89 f6 4c 89 e7 e8 98 ea ff ff 4c 89 f0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f <5d> c3 49 39 dd 0f 84 10 01 00 00 4d 89 ee e9 1c ff ff ff 48 b8 00 [ 789.315804][ C1] RSP: 0018:ffffc900039f7740 EFLAGS: 00000086 [ 789.315811][ C1] RAX: ffff88809890c640 RBX: dffffc0000000000 RCX: 1ffff110131219c9 [ 789.315815][ C1] RDX: 1ffff11015d26e84 RSI: ffff88809890c640 RDI: ffff8880ae937420 [ 789.315820][ C1] RBP: ffffc900039f7740 R08: 0000000000000004 R09: ffff88809890ce50 [ 789.315825][ C1] R10: fffffbfff14f3330 R11: ffffffff8a799987 R12: ffff8880ae9373c0 [ 789.315829][ C1] R13: ffffc900039f7818 R14: ffff88809890c5c0 R15: ffff88809890c640 [ 789.315834][ C1] FS: 0000000000e03880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 789.315838][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 789.315843][ C1] CR2: ffffffffff600400 CR3: 00000000a64ae000 CR4: 00000000001406e0 [ 789.315847][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 789.315852][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 789.315855][ C1] Call Trace: [ 789.315858][ C1] pick_next_task_fair+0x1a7/0xc70 [ 789.315861][ C1] __schedule+0x375/0x1f90 [ 789.315864][ C1] ? __sched_text_start+0x8/0x8 [ 789.315867][ C1] ? paste_selection+0x2f0/0x460 [ 789.315870][ C1] ? __schedule+0xf/0x1f90 [ 789.315873][ C1] schedule+0xdc/0x2b0 [ 789.315876][ C1] paste_selection+0x2f5/0x460 [ 789.315879][ C1] ? vcs_remove_sysfs+0x60/0x60 [ 789.315883][ C1] ? lock_downgrade+0x920/0x920 [ 789.315886][ C1] ? wake_up_q+0x140/0x140 [ 789.315888][ C1] tioclinux+0x133/0x480 [ 789.315891][ C1] vt_ioctl+0x1a41/0x26d0 [ 789.315895][ C1] ? complete_change_console+0x3a0/0x3a0 [ 789.315898][ C1] ? lock_downgrade+0x920/0x920 [ 789.315901][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 789.315905][ C1] ? tomoyo_path_number_perm+0x214/0x520 [ 789.315908][ C1] ? find_held_lock+0x35/0x130 [ 789.315911][ C1] ? tomoyo_path_number_perm+0x214/0x520 [ 789.315915][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 789.315918][ C1] ? tty_jobctrl_ioctl+0x50/0xd40 [ 789.315921][ C1] ? complete_change_console+0x3a0/0x3a0 [ 789.315924][ C1] tty_ioctl+0xa37/0x14f0 [ 789.315926][ C1] ? tty_vhangup+0x30/0x30 [ 789.315929][ C1] ? tomoyo_path_number_perm+0x454/0x520 [ 789.315933][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 789.315936][ C1] ? tomoyo_path_number_perm+0x25e/0x520 [ 789.315939][ C1] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 789.315942][ C1] ? ___might_sleep+0x163/0x2c0 [ 789.315944][ C1] ? tty_vhangup+0x30/0x30 [ 789.315947][ C1] do_vfs_ioctl+0x977/0x14e0 [ 789.315950][ C1] ? compat_ioctl_preallocate+0x220/0x220 [ 789.315953][ C1] ? selinux_file_mprotect+0x620/0x620 [ 789.315956][ C1] ? debug_smp_processor_id+0x33/0x18a [ 789.315960][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 789.315963][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 789.315965][ C1] ? tomoyo_file_ioctl+0x23/0x30 [ 789.315969][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 789.315972][ C1] ? security_file_ioctl+0x8d/0xc0 [ 789.315974][ C1] ksys_ioctl+0xab/0xd0 [ 789.315977][ C1] __x64_sys_ioctl+0x73/0xb0 [ 789.315979][ C1] do_syscall_64+0xfa/0x790 [ 789.315983][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 789.315985][ C1] RIP: 0033:0x441209 [ 789.315994][ 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 [ 789.315998][ C1] RSP: 002b:00007ffd6b182d48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 789.316005][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441209 [ 789.316009][ C1] RDX: 00000000200001c0 RSI: 000000000000541c RDI: 0000000000000003 [ 789.316013][ C1] RBP: 000000000008d3c4 R08: 000000000000000d R09: 00000000004002c8 [ 789.316018][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402030 [ 789.316022][ C1] R13: 00000000004020c0 R14: 0000000000000000 R15: 0000000000000000 [ 789.318551][ T1113] Kernel panic - not syncing: hung_task: blocked tasks [ 789.752368][ T1113] CPU: 0 PID: 1113 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 789.760616][ T1113] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 789.770670][ T1113] Call Trace: [ 789.773970][ T1113] dump_stack+0x197/0x210 [ 789.778306][ T1113] panic+0x2e3/0x75c [ 789.782210][ T1113] ? add_taint.cold+0x16/0x16 [ 789.788189][ T1113] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 789.793824][ T1113] ? ___preempt_schedule+0x16/0x18 [ 789.798956][ T1113] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 789.805135][ T1113] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 789.811300][ T1113] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 789.817469][ T1113] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 789.823627][ T1113] watchdog+0xb22/0x10c0 [ 789.827875][ T1113] kthread+0x361/0x430 [ 789.831941][ T1113] ? reset_hung_task_detector+0x30/0x30 [ 789.837483][ T1113] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 789.843200][ T1113] ret_from_fork+0x24/0x30 [ 789.849250][ T1113] Kernel Offset: disabled [ 789.853590][ T1113] Rebooting in 86400 seconds..