[....] Starting file context maintaining daemon: restorecond[ 70.793946][ T27] kauditd_printk_skb: 5 callbacks suppressed [ 70.793959][ T27] audit: type=1400 audit(1576464975.741:37): avc: denied { watch } for pid=9489 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 [ 70.825629][ T27] audit: type=1400 audit(1576464975.741:38): avc: denied { watch } for pid=9489 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 [?25l[?1c7[ ok 8[?25h[?0c. [ 70.977154][ T27] audit: type=1800 audit(1576464975.921:39): pid=9391 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 [ 70.998998][ T27] audit: type=1800 audit(1576464975.921:40): pid=9391 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: [ 75.169769][ T27] audit: type=1400 audit(1576464980.111:41): avc: denied { map } for pid=9567 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 '10.128.0.184' (ECDSA) to the list of known hosts. executing program executing program executing program [ 663.597028][ T27] audit: type=1400 audit(1576465568.541:42): avc: denied { map } for pid=9579 comm="syz-executor527" path="/root/syz-executor527494156" 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 [ 884.573487][ T1114] INFO: task login:9551 blocked for more than 143 seconds. [ 884.581005][ T1114] Not tainted 5.5.0-rc1-syzkaller #0 [ 884.587484][ T1114] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 884.596450][ T1114] login D23240 9551 1 0x80000002 [ 884.603039][ T1114] Call Trace: [ 884.612663][ T1114] __schedule+0x934/0x1f90 [ 884.617606][ T1114] ? __sched_text_start+0x8/0x8 [ 884.622678][ T1114] ? mark_held_locks+0xa4/0xf0 [ 884.628073][ T1114] schedule+0xdc/0x2b0 [ 884.632161][ T1114] schedule_timeout+0x717/0xc50 [ 884.637609][ T1114] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 884.643086][ T1114] ? usleep_range+0x170/0x170 [ 884.648291][ T1114] ? __this_cpu_preempt_check+0x2c/0x190 [ 884.654508][ T1114] ? __this_cpu_preempt_check+0x35/0x190 [ 884.660451][ T1114] ? retint_kernel+0x2b/0x2b [ 884.665432][ T1114] ? _raw_spin_unlock_irq+0x4f/0x80 [ 884.670692][ T1114] __ldsem_down_write_nested+0x3b2/0x8f0 [ 884.676679][ T1114] ? ldsem_wake+0x40/0x40 [ 884.681241][ T1114] ? ___might_sleep+0x163/0x2c0 [ 884.687378][ T1114] ? put_tty_driver+0x20/0x20 [ 884.692063][ T1114] ldsem_down_write+0x33/0x40 [ 884.697073][ T1114] ? ldsem_down_write+0x33/0x40 [ 884.702064][ T1114] tty_ldisc_lock+0x66/0xb0 [ 884.706912][ T1114] tty_ldisc_hangup+0x1c6/0x640 [ 884.711909][ T1114] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 884.718620][ T1114] ? put_tty_driver+0x20/0x20 [ 884.724772][ T1114] __tty_hangup.part.0+0x2fb/0x750 [ 884.730063][ T1114] tty_vhangup_session+0x25/0x30 [ 884.735358][ T1114] disassociate_ctty.part.0+0xb4/0x740 [ 884.741478][ T1114] disassociate_ctty+0x81/0xa0 [ 884.746703][ T1114] do_exit+0x1b42/0x2ef0 [ 884.751009][ T1114] ? __vfs_write+0x92/0x110 [ 884.755912][ T1114] ? mm_update_next_owner+0x7c0/0x7c0 [ 884.761461][ T1114] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 884.768173][ T1114] ? ksys_write+0x1cf/0x290 [ 884.772819][ T1114] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 884.778745][ T1114] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 884.784724][ T1114] do_group_exit+0x135/0x360 [ 884.789423][ T1114] __x64_sys_exit_group+0x44/0x50 [ 884.794768][ T1114] do_syscall_64+0xfa/0x790 [ 884.799407][ T1114] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 884.806278][ T1114] RIP: 0033:0x7f4d8645c1e8 [ 884.810781][ T1114] Code: Bad RIP value. [ 884.816248][ T1114] RSP: 002b:00007ffc9b404268 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 884.825267][ T1114] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4d8645c1e8 [ 884.833712][ T1114] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 884.841910][ T1114] RBP: 00007f4d86731840 R08: 00000000000000e7 R09: ffffffffffffffa8 [ 884.850235][ T1114] R10: 00007f4d86737740 R11: 0000000000000246 R12: 00007f4d86731840 [ 884.858646][ T1114] R13: 0000000000000001 R14: 0000000000000001 R15: 000000000060b798 [ 884.866921][ T1114] [ 884.866921][ T1114] Showing all locks held in the system: [ 884.875105][ T1114] 1 lock held by khungtaskd/1114: [ 884.880134][ T1114] #0: ffffffff899a56c0 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 [ 884.889933][ T1114] 1 lock held by rsyslogd/9429: [ 884.895078][ T1114] #0: ffff8880a32dfe20 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 [ 884.904268][ T1114] 2 locks held by login/9551: [ 884.908955][ T1114] #0: ffff8880a9091198 (&tty->legacy_mutex){+.+.}, at: tty_lock+0xc7/0x130 [ 884.918095][ T1114] #1: ffff8880a9091090 (&tty->ldisc_sem){++++}, at: ldsem_down_write+0x33/0x40 [ 884.927450][ T1114] 2 locks held by getty/9552: [ 884.932125][ T1114] #0: ffff8880922f9090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 884.941647][ T1114] #1: ffffc900019432e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 884.952548][ T1114] 2 locks held by getty/9553: [ 884.957650][ T1114] #0: ffff88809d90d090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 884.966931][ T1114] #1: ffffc900019732e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 884.977138][ T1114] 2 locks held by getty/9554: [ 884.981866][ T1114] #0: ffff888095499090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 884.991719][ T1114] #1: ffffc900018f32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 885.001845][ T1114] 2 locks held by getty/9555: [ 885.007143][ T1114] #0: ffff8880a4a98090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 885.016586][ T1114] #1: ffffc900019332e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 885.026590][ T1114] 2 locks held by getty/9556: [ 885.031355][ T1114] #0: ffff8880a8cab090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 885.041027][ T1114] #1: ffffc900019832e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 885.051045][ T1114] 2 locks held by getty/9557: [ 885.056023][ T1114] #0: ffff8880a4a66090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 [ 885.065880][ T1114] #1: ffffc900018c32e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 [ 885.076671][ T1114] 2 locks held by syz-executor527/9779: [ 885.082492][ T1114] [ 885.085340][ T1114] ============================================= [ 885.085340][ T1114] [ 885.094686][ T1114] NMI backtrace for cpu 0 [ 885.099203][ T1114] CPU: 0 PID: 1114 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 885.107992][ T1114] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 885.118264][ T1114] Call Trace: [ 885.121665][ T1114] dump_stack+0x197/0x210 [ 885.126011][ T1114] nmi_cpu_backtrace.cold+0x70/0xb2 [ 885.131328][ T1114] ? vprintk_func+0x86/0x189 [ 885.135973][ T1114] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 885.141726][ T1114] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 885.148023][ T1114] arch_trigger_cpumask_backtrace+0x14/0x20 [ 885.156784][ T1114] watchdog+0xb11/0x10c0 [ 885.161110][ T1114] kthread+0x361/0x430 [ 885.165188][ T1114] ? reset_hung_task_detector+0x30/0x30 [ 885.170737][ T1114] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 885.176464][ T1114] ret_from_fork+0x24/0x30 [ 885.180999][ T1114] Sending NMI from CPU 0 to CPUs 1: [ 885.187370][ C1] NMI backtrace for cpu 1 [ 885.187375][ C1] CPU: 1 PID: 9779 Comm: syz-executor527 Not tainted 5.5.0-rc1-syzkaller #0 [ 885.187381][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 885.187384][ C1] RIP: 0010:__sanitizer_cov_trace_pc+0x4b/0x50 [ 885.187394][ C1] Code: 90 80 13 00 00 83 fa 02 75 20 48 8b 88 88 13 00 00 8b 80 84 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 <5d> c3 0f 1f 00 65 4c 8b 04 25 c0 1e 02 00 65 8b 05 98 f2 8c 7e a9 [ 885.187397][ C1] RSP: 0018:ffffc90002827650 EFLAGS: 00000093 [ 885.187404][ C1] RAX: ffff888090b880c0 RBX: ffffc900028276e0 RCX: 1ffffffff16c78a4 [ 885.187408][ C1] RDX: 0000000000000000 RSI: ffffffff8392eecc RDI: 0000000000000001 [ 885.187413][ C1] RBP: ffffc90002827650 R08: 1ffff11015d2703c R09: ffffed1015d2703d [ 885.187417][ C1] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: ffff8880ae938115 [ 885.187421][ C1] R13: ffff888090b880c0 R14: ffff888090b880c0 R15: ffff8880ae937358 [ 885.187426][ C1] FS: 0000000000c14880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 885.187429][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 885.187434][ C1] CR2: ffffffffff600400 CR3: 00000000a82b7000 CR4: 00000000001406e0 [ 885.187438][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 885.187442][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 885.187445][ C1] Call Trace: [ 885.187448][ C1] debug_smp_processor_id+0xc/0x18a [ 885.187451][ C1] rcu_lockdep_current_cpu_online+0x39/0x130 [ 885.187454][ C1] rcu_read_lock_held_common+0xbd/0x130 [ 885.187458][ C1] rcu_read_lock_sched_held+0x5b/0xd0 [ 885.187461][ C1] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 885.187464][ C1] ? __this_cpu_preempt_check+0x35/0x190 [ 885.187468][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 885.187471][ C1] ? __this_cpu_preempt_check+0x35/0x190 [ 885.187475][ C1] rcu_note_context_switch+0x108a/0x1910 [ 885.187477][ C1] ? schedule+0xdc/0x2b0 [ 885.187481][ C1] ? trace_hardirqs_off+0x62/0x240 [ 885.187483][ C1] __schedule+0x22a/0x1f90 [ 885.187486][ C1] ? __sched_text_start+0x8/0x8 [ 885.187489][ C1] schedule+0xdc/0x2b0 [ 885.187492][ C1] paste_selection+0x2f5/0x460 [ 885.187495][ C1] ? vcs_remove_sysfs+0x60/0x60 [ 885.187498][ C1] ? lock_downgrade+0x920/0x920 [ 885.187501][ C1] ? wake_up_q+0x140/0x140 [ 885.187504][ C1] tioclinux+0x133/0x480 [ 885.187507][ C1] vt_ioctl+0x1a41/0x26d0 [ 885.187510][ C1] ? complete_change_console+0x3a0/0x3a0 [ 885.187513][ C1] ? lock_downgrade+0x920/0x920 [ 885.187516][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 885.187519][ C1] ? tomoyo_path_number_perm+0x214/0x520 [ 885.187522][ C1] ? find_held_lock+0x35/0x130 [ 885.187525][ C1] ? tomoyo_path_number_perm+0x214/0x520 [ 885.187529][ C1] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 885.187532][ C1] ? tty_jobctrl_ioctl+0x50/0xd40 [ 885.187535][ C1] ? complete_change_console+0x3a0/0x3a0 [ 885.187538][ C1] tty_ioctl+0xa37/0x14f0 [ 885.187541][ C1] ? tty_vhangup+0x30/0x30 [ 885.187544][ C1] ? tomoyo_path_number_perm+0x454/0x520 [ 885.187548][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 885.187551][ C1] ? tomoyo_path_number_perm+0x25e/0x520 [ 885.187554][ C1] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 885.187557][ C1] ? ___might_sleep+0x163/0x2c0 [ 885.187560][ C1] ? tty_vhangup+0x30/0x30 [ 885.187563][ C1] do_vfs_ioctl+0x977/0x14e0 [ 885.187566][ C1] ? compat_ioctl_preallocate+0x220/0x220 [ 885.187569][ C1] ? selinux_file_mprotect+0x620/0x620 [ 885.187573][ C1] ? debug_smp_processor_id+0x33/0x18a [ 885.187576][ C1] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 885.187579][ C1] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 885.187582][ C1] ? tomoyo_file_ioctl+0x23/0x30 [ 885.187585][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 885.187588][ C1] ? security_file_ioctl+0x8d/0xc0 [ 885.187590][ C1] ksys_ioctl+0xab/0xd0 [ 885.187593][ C1] __x64_sys_ioctl+0x73/0xb0 [ 885.187595][ C1] do_syscall_64+0xfa/0x790 [ 885.187598][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 885.187601][ C1] RIP: 0033:0x441219 [ 885.187609][ 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 [ 885.187612][ C1] RSP: 002b:00007ffe0a89cda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 885.187619][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441219 [ 885.187623][ C1] RDX: 00000000200001c0 RSI: 000000000000541c RDI: 0000000000000003 [ 885.187627][ C1] RBP: 00000000000a3d73 R08: 000000000000000d R09: 00000000004002c8 [ 885.187630][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402040 [ 885.187634][ C1] R13: 00000000004020d0 R14: 0000000000000000 R15: 0000000000000000 [ 885.190145][ T1114] Kernel panic - not syncing: hung_task: blocked tasks [ 885.667237][ T1114] CPU: 0 PID: 1114 Comm: khungtaskd Not tainted 5.5.0-rc1-syzkaller #0 [ 885.675473][ T1114] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 885.686025][ T1114] Call Trace: [ 885.689455][ T1114] dump_stack+0x197/0x210 [ 885.693997][ T1114] panic+0x2e3/0x75c [ 885.698230][ T1114] ? add_taint.cold+0x16/0x16 [ 885.703024][ T1114] ? lapic_can_unplug_cpu.cold+0x3a/0x3a [ 885.708800][ T1114] ? ___preempt_schedule+0x16/0x18 [ 885.714162][ T1114] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 885.720335][ T1114] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 885.726501][ T1114] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 885.732656][ T1114] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 885.738820][ T1114] watchdog+0xb22/0x10c0 [ 885.743078][ T1114] kthread+0x361/0x430 [ 885.747155][ T1114] ? reset_hung_task_detector+0x30/0x30 [ 885.752705][ T1114] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 885.758433][ T1114] ret_from_fork+0x24/0x30 [ 885.764523][ T1114] Kernel Offset: disabled [ 885.768865][ T1114] Rebooting in 86400 seconds..