[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 65.084048][ T27] audit: type=1800 audit(1577409398.584:25): pid=9108 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.112182][ T27] audit: type=1800 audit(1577409398.584:26): pid=9108 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.153245][ T27] audit: type=1800 audit(1577409398.584:27): pid=9108 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 75.447566][ T9260] BUG: unable to handle page fault for address: 000000010000000e [ 75.447574][ T9260] #PF: supervisor write access in kernel mode [ 75.447581][ T9260] #PF: error_code(0x0002) - not-present page [ 75.447586][ T9260] PGD 94b88067 P4D 94b88067 PUD 0 [ 75.447606][ T9260] Oops: 0002 [#1] PREEMPT SMP KASAN [ 75.447621][ T9260] CPU: 0 PID: 9260 Comm: syz-executor816 Not tainted 5.5.0-rc2-next-20191220-syzkaller #0 [ 75.447629][ T9260] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.447646][ T9260] RIP: 0010:insert_char+0x23d/0x400 [ 75.447658][ T9260] Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e 1e 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 [ 75.447665][ T9260] RSP: 0018:ffffc90005ccf858 EFLAGS: 00010202 [ 75.447674][ T9260] RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001 [ 75.447682][ T9260] RDX: 1ffff1101300be79 RSI: 000000010000000e RDI: 000000010000000e [ 75.447690][ T9260] RBP: ffffc90005ccf8a0 R08: ffff8880962c21c0 R09: ffff8880962c2a58 [ 75.447698][ T9260] R10: fffffbfff1502d58 R11: ffffffff8a816ac7 R12: 0000000000000000 [ 75.447705][ T9260] R13: ffff88809805f000 R14: ffff88809805f334 R15: 000000010000000e [ 75.447717][ T9260] FS: 0000000001bdd880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 75.447725][ T9260] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.447734][ T9260] CR2: 000000010000000e CR3: 000000009fc39000 CR4: 00000000001406f0 [ 75.447748][ T9260] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.447756][ T9260] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.447760][ T9260] Call Trace: [ 75.447779][ T9260] do_con_trol+0x41a6/0x61b0 [ 75.447803][ T9260] ? reset_palette+0x190/0x190 [ 75.447820][ T9260] ? __kasan_check_read+0x11/0x20 [ 75.447838][ T9260] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 75.447857][ T9260] do_con_write.part.0+0xfd9/0x1ef0 [ 75.447880][ T9260] ? do_con_trol+0x61b0/0x61b0 [ 75.447899][ T9260] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 75.447911][ T9260] ? add_wait_queue+0x112/0x170 [ 75.447928][ T9260] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 75.447947][ T9260] ? trace_hardirqs_on+0x67/0x240 [ 75.447964][ T9260] con_write+0x46/0xd0 [ 75.447979][ T9260] n_tty_write+0x40e/0x1080 [ 75.447999][ T9260] ? n_tty_read+0x1bf0/0x1bf0 [ 75.448015][ T9260] ? prepare_to_wait_exclusive+0x320/0x320 [ 75.448034][ T9260] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 75.448051][ T9260] ? _copy_from_user+0x12c/0x1a0 [ 75.448068][ T9260] tty_write+0x496/0x7f0 [ 75.448081][ T9260] ? n_tty_read+0x1bf0/0x1bf0 [ 75.448097][ T9260] __vfs_write+0x8a/0x110 [ 75.448113][ T9260] ? hung_up_tty_compat_ioctl+0x40/0x40 [ 75.448129][ T9260] vfs_write+0x268/0x5d0 [ 75.448146][ T9260] ksys_write+0x14f/0x290 [ 75.448162][ T9260] ? __ia32_sys_read+0xb0/0xb0 [ 75.448179][ T9260] ? do_syscall_64+0x26/0x790 [ 75.448193][ T9260] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.448208][ T9260] ? do_syscall_64+0x26/0x790 [ 75.448225][ T9260] __x64_sys_write+0x73/0xb0 [ 75.448241][ T9260] do_syscall_64+0xfa/0x790 [ 75.448257][ T9260] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.448267][ T9260] RIP: 0033:0x4404f9 [ 75.448281][ T9260] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 75.448288][ T9260] RSP: 002b:00007ffc9fe3ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 75.448299][ T9260] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 75.448307][ T9260] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 75.448315][ T9260] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 75.448324][ T9260] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 75.448332][ T9260] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 75.448343][ T9260] Modules linked in: [ 75.448353][ T9260] CR2: 000000010000000e [ 75.448366][ T9260] ---[ end trace 64ce8c63344fcb75 ]--- [ 75.448386][ T9260] RIP: 0010:insert_char+0x23d/0x400 [ 75.448400][ T9260] Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e 1e 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 <f3> 66 ab 49 8d bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 [ 75.448407][ T9260] RSP: 0018:ffffc90005ccf858 EFLAGS: 00010202 [ 75.448418][ T9260] RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001 [ 75.448426][ T9260] RDX: 1ffff1101300be79 RSI: 000000010000000e RDI: 000000010000000e [ 75.448435][ T9260] RBP: ffffc90005ccf8a0 R08: ffff8880962c21c0 R09: ffff8880962c2a58 [ 75.448444][ T9260] R10: fffffbfff1502d58 R11: ffffffff8a816ac7 R12: 0000000000000000 [ 75.448453][ T9260] R13: ffff88809805f000 R14: ffff88809805f334 R15: 000000010000000e [ 75.448464][ T9260] FS: 0000000001bdd880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 75.448473][ T9260] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.448482][ T9260] CR2: 000000010000000e CR3: 000000009fc39000 CR4: 00000000001406f0 [ 75.448492][ T9260] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.448501][ T9260] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.448507][ T9260] Kernel panic - not syncing: Fatal exception [ 75.449963][ T9260] Kernel Offset: disabled [ 75.962209][ T9260] Rebooting in 86400 seconds..