[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.761747][ T27] audit: type=1800 audit(1579142225.333:25): pid=9469 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.794790][ T27] audit: type=1800 audit(1579142225.343:26): pid=9469 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.825683][ T27] audit: type=1800 audit(1579142225.343:27): pid=9469 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[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.506218][ T9623] BUG: unable to handle page fault for address: 000000010000000e [ 77.506227][ T9623] #PF: supervisor write access in kernel mode [ 77.506234][ T9623] #PF: error_code(0x0002) - not-present page [ 77.506239][ T9623] PGD a6e30067 P4D a6e30067 PUD 0 [ 77.506258][ T9623] Oops: 0002 [#1] PREEMPT SMP KASAN [ 77.506273][ T9623] CPU: 0 PID: 9623 Comm: syz-executor969 Not tainted 5.5.0-rc6-syzkaller #0 [ 77.506279][ T9623] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.506297][ T9623] RIP: 0010:csi_J+0x2bf/0xb00 [ 77.506310][ T9623] Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e af 06 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 66 ab 48 89 df e8 46 f2 ff ff 31 ff 41 89 c6 89 c6 e8 5a d5 88 [ 77.506317][ T9623] RSP: 0018:ffffc900079e7860 EFLAGS: 00010202 [ 77.506327][ T9623] RAX: 0000000000000720 RBX: ffff888095556000 RCX: 0000000000000001 [ 77.506334][ T9623] RDX: 1ffff11012aaac79 RSI: ffffffff83ec2116 RDI: 000000010000000e [ 77.506342][ T9623] RBP: ffffc900079e78a0 R08: ffff888097638540 R09: ffff888097638dd0 [ 77.506351][ T9623] R10: fffffbfff14f6998 R11: ffffffff8a7b4cc7 R12: 000000010000000e [ 77.506359][ T9623] R13: 7fffffff80000001 R14: 0000000000000011 R15: 0000000000000000 [ 77.506369][ T9623] FS: 000000000128b880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.506377][ T9623] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.506384][ T9623] CR2: 00007f88dfa21000 CR3: 0000000096051000 CR4: 00000000001406f0 [ 77.506396][ T9623] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.506403][ T9623] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.506407][ T9623] Call Trace: [ 77.506425][ T9623] ? __atomic_notifier_call_chain+0xd6/0x1a0 [ 77.506442][ T9623] do_con_trol+0x50cc/0x61b0 [ 77.506460][ T9623] ? reset_palette+0x190/0x190 [ 77.506483][ T9623] ? __kasan_check_read+0x11/0x20 [ 77.506500][ T9623] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 77.506519][ T9623] do_con_write.part.0+0xfd9/0x1ef0 [ 77.506545][ T9623] ? do_con_trol+0x61b0/0x61b0 [ 77.506561][ T9623] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 77.506572][ T9623] ? add_wait_queue+0x112/0x170 [ 77.506584][ T9623] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 77.506600][ T9623] ? trace_hardirqs_on+0x67/0x240 [ 77.506616][ T9623] con_write+0x46/0xd0 [ 77.506634][ T9623] n_tty_write+0x40e/0x1080 [ 77.506656][ T9623] ? n_tty_read+0x1bf0/0x1bf0 [ 77.506670][ T9623] ? prepare_to_wait_exclusive+0x320/0x320 [ 77.506688][ T9623] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 77.506703][ T9623] ? _copy_from_user+0x12c/0x1a0 [ 77.506719][ T9623] tty_write+0x496/0x7f0 [ 77.506735][ T9623] ? n_tty_read+0x1bf0/0x1bf0 [ 77.506749][ T9623] __vfs_write+0x8a/0x110 [ 77.506762][ T9623] ? put_tty_driver+0x20/0x20 [ 77.506775][ T9623] vfs_write+0x268/0x5d0 [ 77.506790][ T9623] ksys_write+0x14f/0x290 [ 77.506804][ T9623] ? __ia32_sys_read+0xb0/0xb0 [ 77.506820][ T9623] ? do_syscall_64+0x26/0x790 [ 77.506832][ T9623] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.506844][ T9623] ? do_syscall_64+0x26/0x790 [ 77.506858][ T9623] __x64_sys_write+0x73/0xb0 [ 77.506869][ T9623] do_syscall_64+0xfa/0x790 [ 77.506878][ T9623] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.506884][ T9623] RIP: 0033:0x4404f9 [ 77.506892][ T9623] 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 [ 77.506895][ T9623] RSP: 002b:00007ffd0fdaccd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 77.506903][ T9623] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 77.506907][ T9623] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 77.506911][ T9623] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 77.506915][ T9623] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 77.506919][ T9623] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 77.506925][ T9623] Modules linked in: [ 77.506932][ T9623] CR2: 000000010000000e [ 77.506941][ T9623] ---[ end trace 5768c8892f9cc63c ]--- [ 77.506949][ T9623] RIP: 0010:csi_J+0x2bf/0xb00 [ 77.506956][ T9623] Code: ff df 43 8d 4c 2d 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e af 06 00 00 0f b7 83 c8 03 00 00 d1 e9 4c 89 e7 66 ab 48 89 df e8 46 f2 ff ff 31 ff 41 89 c6 89 c6 e8 5a d5 88 [ 77.506960][ T9623] RSP: 0018:ffffc900079e7860 EFLAGS: 00010202 [ 77.506965][ T9623] RAX: 0000000000000720 RBX: ffff888095556000 RCX: 0000000000000001 [ 77.506971][ T9623] RDX: 1ffff11012aaac79 RSI: ffffffff83ec2116 RDI: 000000010000000e [ 77.506977][ T9623] RBP: ffffc900079e78a0 R08: ffff888097638540 R09: ffff888097638dd0 [ 77.506982][ T9623] R10: fffffbfff14f6998 R11: ffffffff8a7b4cc7 R12: 000000010000000e [ 77.506986][ T9623] R13: 7fffffff80000001 R14: 0000000000000011 R15: 0000000000000000 [ 77.506992][ T9623] FS: 000000000128b880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 77.506997][ T9623] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.507001][ T9623] CR2: 00007f88dfa21000 CR3: 0000000096051000 CR4: 00000000001406f0 [ 77.507008][ T9623] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.507013][ T9623] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.507016][ T9623] Kernel panic - not syncing: Fatal exception [ 77.508421][ T9623] Kernel Offset: disabled [ 78.023315][ T9623] Rebooting in 86400 seconds..