[ 72.861634][ T27] audit: type=1400 audit(1575979402.982:37): avc: denied { watch } for pid=9674 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 [ 72.892225][ T27] audit: type=1400 audit(1575979402.982:38): avc: denied { watch } for pid=9674 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. [ 73.149671][ T27] audit: type=1800 audit(1575979403.272:39): pid=9582 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 [ 73.171892][ T27] audit: type=1800 audit(1575979403.272:40): pid=9582 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: [ 77.244108][ T27] audit: type=1400 audit(1575979407.362:41): avc: denied { map } for pid=9760 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 '10.128.0.38' (ECDSA) to the list of known hosts. [ 643.670265][ T27] audit: type=1400 audit(1575979973.792:42): avc: denied { map } for pid=9772 comm="syz-executor701" path="/root/syz-executor701940654" 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 [ 643.700037][ T9773] IPVS: ftp: loaded support on port[0] = 21 executing program [ 643.729369][ T27] audit: type=1400 audit(1575979973.852:43): avc: denied { create } for pid=9773 comm="syz-executor701" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 executing program [ 643.754188][ T27] audit: type=1400 audit(1575979973.852:44): avc: denied { write } for pid=9773 comm="syz-executor701" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 [ 643.754210][ T27] audit: type=1400 audit(1575979973.852:45): avc: denied { read } for pid=9773 comm="syz-executor701" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket 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 [ 865.986018][ T1116] INFO: task login:9742 blocked for more than 143 seconds. [ 865.993355][ T1116] Not tainted 5.5.0-rc1-syzkaller #0 [ 865.999406][ T1116] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 866.008219][ T1116] login D23224 9742 1 0x80000002 [ 866.014560][ T1116] Call Trace: [ 866.018967][ T1116] __schedule+0x934/0x1f90 [ 866.023404][ T1116] ? __sched_text_start+0x8/0x8 [ 866.028436][ T1116] ? __lock_acquire+0x29c9/0x4a00 [ 866.033467][ T1116] schedule+0xdc/0x2b0 [ 866.037697][ T1116] schedule_timeout+0x717/0xc50 [ 866.042609][ T1116] ? __kasan_check_read+0x11/0x20 [ 866.047785][ T1116] ? usleep_range+0x170/0x170 [ 866.052477][ T1116] ? mark_held_locks+0xa4/0xf0 [ 866.057438][ T1116] ? _raw_spin_unlock_irq+0x23/0x80 [ 866.062717][ T1116] ? __ldsem_down_write_nested+0x3aa/0x8f0 [ 866.068826][ T1116] ? _raw_spin_unlock_irq+0x23/0x80 [ 866.074042][ T1116] ? lockdep_hardirqs_on+0x421/0x5e0 [ 866.079648][ T1116] ? trace_hardirqs_on+0x67/0x240 [ 866.084692][ T1116] __ldsem_down_write_nested+0x3b2/0x8f0 [ 866.090526][ T1116] ? ldsem_wake+0x40/0x40 [ 866.094919][ T1116] ? ___might_sleep+0x163/0x2c0 [ 866.099996][ T1116] ? put_tty_driver+0x20/0x20 [ 866.104678][ T1116] ldsem_down_write+0x33/0x40 [ 866.109793][ T1116] ? ldsem_down_write+0x33/0x40 [ 866.114651][ T1116] tty_ldisc_lock+0x66/0xb0 [ 866.119308][ T1116] tty_ldisc_hangup+0x1c6/0x640 [ 866.124217][ T1116] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 866.130803][ T1116] ? put_tty_driver+0x20/0x20 [ 866.135489][ T1116] __tty_hangup.part.0+0x2fb/0x750 [ 866.140831][ T1116] tty_vhangup_session+0x25/0x30 [ 866.145777][ T1116] disassociate_ctty.part.0+0xb4/0x740 [ 866.152303][ T1116] disassociate_ctty+0x81/0xa0 [ 866.157319][ T1116] do_exit+0x1b42/0x2ef0 [ 866.161600][ T1116] ? __vfs_write+0x92/0x110 [ 866.166342][ T1116] ? mm_update_next_owner+0x7c0/0x7c0 [ 866.171754][ T1116] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 866.178210][ T1116] ? ksys_write+0x1cf/0x290 [ 866.182855][ T1116] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 866.188762][ T1116] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 866.194226][ T1116] do_group_exit+0x135/0x360 [ 866.198973][ T1116] __x64_sys_exit_group+0x44/0x50 [ 866.204003][ T1116] do_syscall_64+0xfa/0x790 [ 866.208679][ T1116] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 866.214569][ T1116] RIP: 0033:0x7ff7421621e8 [ 866.219201][ T1116] Code: Bad RIP value. [ 866.223274][ T1116] RSP: 002b:00007ffc5aa54328 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 866.231990][ T1116] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff7421621e8 [ 866.240119][ T1116] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 866.248236][ T1116] RBP: 00007ff742437840 R08: 00000000000000e7 R09: ffffffffffffffa8 [ 866.256352][ T1116] R10: 00007ff74243d740 R11: 0000000000000246 R12: 00007ff742437840 [ 866.264319][ T1116] R13: 0000000000000001 R14: 0000000000000001 R15: 000000000060b798 [ 866.272455][ T1116] [ 866.272455][ T1116] Showing all locks held in the system: [ 866.281190][ T1116] 1 lock held by khungtaskd/1116: [ 866.286353][ T1116] #0: ffffffff899a56c0 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 866.295685][ T1116] 1 lock held by rsyslogd/9620: [ 866.300684][ T1116] #0: ffff88809f38fba0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 866.309536][ T1116] 2 locks held by login/9742: [ 866.314210][ T1116] #0: ffff888087fee198 (&tty->legacy_mutex){+.+.}, at: tty_lock+0xc7/0x130 [ 866.323042][ T1116] #1: ffff888087fee090 (&tty->ldisc_sem){++++}, at: ldsem_down_write+0x33/0x40 [ 866.332215][ T1116] 2 locks held by getty/9743: [ 866.337015][ T1116] #0: ffff888087fef090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 866.346110][ T1116] #1: ffffc9000198b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 866.355692][ T1116] 2 locks held by getty/9744: [ 866.360524][ T1116] #0: ffff888099c0a090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 866.369619][ T1116] #1: ffffc90001a0b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 866.379317][ T1116] 2 locks held by getty/9745: [ 866.383982][ T1116] #0: ffff8880a6844090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 866.393458][ T1116] #1: ffffc900019eb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 866.403165][ T1116] 2 locks held by getty/9746: [ 866.408890][ T1116] #0: ffff8880a6876090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 866.418014][ T1116] #1: ffffc900019db2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 866.427805][ T1116] 2 locks held by getty/9747: [ 866.437122][ T1116] #0: ffff888088d2a090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 866.446216][ T1116] #1: ffffc900019fb2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 866.455780][ T1116] 2 locks held by getty/9748: [ 866.460946][ T1116] #0: ffff8880a72fa090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 866.470035][ T1116] #1: ffffc900019532e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 866.479743][ T1116] 2 locks held by syz-executor701/10373: [ 866.485363][ T1116] #0: ffff888087fee090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 866.494480][ T1116] #1: ffff8880aa5bc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x30/0x40 [ 866.504019][ T1116] [ 866.506484][ T1116] ============================================= [ 866.506484][ T1116] [ 866.514894][ T1116] NMI backtrace for cpu 1 [ 866.519269][ T1116] CPU: 1 PID: 1116 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 866.527494][ T1116] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 866.537541][ T1116] Call Trace: [ 866.540932][ T1116] dump_stack+0x197/0x210 [ 866.545269][ T1116] nmi_cpu_backtrace.cold+0x70/0xb2 [ 866.550547][ T1116] ? vprintk_func+0x86/0x189 [ 866.555168][ T1116] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 866.560802][ T1116] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 866.566780][ T1116] arch_trigger_cpumask_backtrace+0x14/0x20 [ 866.572667][ T1116] watchdog+0xb11/0x10c0 [ 866.576949][ T1116] kthread+0x361/0x430 [ 866.581015][ T1116] ? reset_hung_task_detector+0x30/0x30 [ 866.586555][ T1116] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 866.592268][ T1116] ret_from_fork+0x24/0x30 [ 866.596808][ T1116] Sending NMI from CPU 1 to CPUs 0: [ 866.602788][ C0] NMI backtrace for cpu 0 [ 866.602795][ C0] CPU: 0 PID: 10373 Comm: syz-executor701 Not tainted 5.5.0-rc1-syzkaller #0 [ 866.602801][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 866.602804][ C0] RIP: 0010:lock_release+0x4d9/0x960 [ 866.602815][ C0] Code: 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 00 00 00 43 08 00 00 00 00 48 8b 45 d0 65 48 33 04 25 28 00 00 00 0f 85 [ 866.602818][ C0] RSP: 0018:ffffc900020676c0 EFLAGS: 00000086 [ 866.602826][ C0] RAX: dffffc0000000000 RBX: fffff5200040cedd RCX: 1ffff110128ea1b1 [ 866.602830][ C0] RDX: dffffc0000000000 RSI: 1ffff110128ea1bd RDI: 0000000000000086 [ 866.602835][ C0] RBP: ffffc90002067790 R08: 0000000000000003 R09: ffff888094750d90 [ 866.602839][ C0] R10: fffffbfff14f3330 R11: ffffffff8a799987 R12: ffff888094750500 [ 866.602844][ C0] R13: ffffffff87c73dfd R14: ffffc90002067768 R15: ffff888094750500 [ 866.602849][ C0] FS: 00007fe903c32700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 866.602853][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 866.602857][ C0] CR2: ffffffffff600400 CR3: 00000000a4bf4000 CR4: 00000000001406f0 [ 866.602862][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 866.602866][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 866.602869][ C0] Call Trace: [ 866.602872][ C0] ? lock_downgrade+0x920/0x920 [ 866.602875][ C0] ? lock_repin_lock+0x4b0/0x4b0 [ 866.602878][ C0] ? pick_next_task_fair+0x41b/0xc70 [ 866.602882][ C0] _raw_spin_unlock_irq+0x16/0x80 [ 866.602884][ C0] __schedule+0x155d/0x1f90 [ 866.602888][ C0] ? __this_cpu_preempt_check+0x35/0x190 [ 866.602891][ C0] ? __sched_text_start+0x8/0x8 [ 866.602894][ C0] ? paste_selection+0x2af/0x460 [ 866.602897][ C0] schedule+0xdc/0x2b0 [ 866.602900][ C0] paste_selection+0x2f5/0x460 [ 866.602903][ C0] ? vcs_remove_sysfs+0x60/0x60 [ 866.602906][ C0] ? lock_downgrade+0x920/0x920 [ 866.602909][ C0] ? wake_up_q+0x140/0x140 [ 866.602912][ C0] tioclinux+0x133/0x480 [ 866.602915][ C0] vt_ioctl+0x1a41/0x26d0 [ 866.602918][ C0] ? complete_change_console+0x3a0/0x3a0 [ 866.602921][ C0] ? lock_downgrade+0x920/0x920 [ 866.602925][ C0] ? rwlock_bug.part.0+0x90/0x90 [ 866.602928][ C0] ? tomoyo_path_number_perm+0x214/0x520 [ 866.602931][ C0] ? find_held_lock+0x35/0x130 [ 866.602935][ C0] ? tomoyo_path_number_perm+0x214/0x520 [ 866.602938][ C0] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 866.602942][ C0] ? tty_jobctrl_ioctl+0x50/0xd40 [ 866.602945][ C0] ? complete_change_console+0x3a0/0x3a0 [ 866.602948][ C0] tty_ioctl+0xa37/0x14f0 [ 866.602951][ C0] ? tty_vhangup+0x30/0x30 [ 866.602955][ C0] ? tomoyo_path_number_perm+0x454/0x520 [ 866.602958][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 866.602962][ C0] ? tomoyo_path_number_perm+0x25e/0x520 [ 866.602965][ C0] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 866.602969][ C0] ? ___might_sleep+0x163/0x2c0 [ 866.602972][ C0] ? tty_vhangup+0x30/0x30 [ 866.602975][ C0] do_vfs_ioctl+0x977/0x14e0 [ 866.602978][ C0] ? compat_ioctl_preallocate+0x220/0x220 [ 866.602982][ C0] ? selinux_file_mprotect+0x620/0x620 [ 866.602984][ C0] ? __fget+0x37f/0x550 [ 866.602987][ C0] ? ksys_dup3+0x3e0/0x3e0 [ 866.602991][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 866.602994][ C0] ? tomoyo_file_ioctl+0x23/0x30 [ 866.602998][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 866.603001][ C0] ? security_file_ioctl+0x8d/0xc0 [ 866.603004][ C0] ksys_ioctl+0xab/0xd0 [ 866.603006][ C0] __x64_sys_ioctl+0x73/0xb0 [ 866.603009][ C0] do_syscall_64+0xfa/0x790 [ 866.603017][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 866.603020][ C0] RIP: 0033:0x446f59 [ 866.603029][ C0] Code: e8 4c 0b 03 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 8b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 866.603032][ C0] RSP: 002b:00007fe903c31db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 866.603040][ C0] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000446f59 [ 866.603044][ C0] RDX: 0000000020000080 RSI: 000000000000541c RDI: 0000000000000004 [ 866.603048][ C0] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 866.603052][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 866.603057][ C0] R13: 00007fff7a915f8f R14: 00007fe903c329c0 R15: 00000000006dcc20 [ 866.604923][ T1116] Kernel panic - not syncing: hung_task: blocked tasks [ 867.044662][ T1116] CPU: 1 PID: 1116 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 867.052897][ T1116] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 867.062954][ T1116] Call Trace: [ 867.066251][ T1116] dump_stack+0x197/0x210 [ 867.070583][ T1116] panic+0x2e3/0x75c [ 867.074475][ T1116] ? add_taint.cold+0x16/0x16 [ 867.079146][ T1116] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 867.084777][ T1116] ? ___preempt_schedule+0x16/0x18 [ 867.089891][ T1116] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 867.096044][ T1116] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 867.102201][ T1116] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 867.108349][ T1116] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 867.114500][ T1116] watchdog+0xb22/0x10c0 [ 867.118755][ T1116] kthread+0x361/0x430 [ 867.122818][ T1116] ? reset_hung_task_detector+0x30/0x30 [ 867.128358][ T1116] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 867.134087][ T1116] ret_from_fork+0x24/0x30 [ 867.140262][ T1116] Kernel Offset: disabled [ 867.144610][ T1116] Rebooting in 86400 seconds..