[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.194016][ T27] audit: type=1800 audit(1577009028.473:25): pid=9114 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 73.213932][ T27] audit: type=1800 audit(1577009028.483:26): pid=9114 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 73.234667][ T27] audit: type=1800 audit(1577009028.483:27): pid=9114 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 '10.128.0.147' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 83.194428][ T9266] BUG: unable to handle page fault for address: 000000010000000e [ 83.194436][ T9266] #PF: supervisor write access in kernel mode [ 83.194443][ T9266] #PF: error_code(0x0002) - not-present page [ 83.194448][ T9266] PGD 9a94b067 P4D 9a94b067 PUD 0 [ 83.194468][ T9266] Oops: 0002 [#1] PREEMPT SMP KASAN [ 83.194484][ T9266] CPU: 1 PID: 9266 Comm: syz-executor213 Not tainted 5.5.0-rc2-next-20191220-syzkaller #0 [ 83.194492][ T9266] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.194509][ T9266] RIP: 0010:do_con_trol+0x47ea/0x61b0 [ 83.194523][ T9266] Code: 08 2c 01 0f 8e b1 00 00 00 4c 8b bd 08 ff ff ff 48 63 db 44 89 e9 41 0f b7 84 24 c8 03 00 00 48 01 db d1 e9 49 01 df 4c 89 ff 66 ab 49 8d bc 24 78 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 [ 83.194530][ T9266] RSP: 0018:ffffc9000209f8b0 EFLAGS: 00010202 [ 83.194541][ T9266] RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001 [ 83.194549][ T9266] RDX: 1ffff11012b29a79 RSI: ffffffff83e2aa0d RDI: 000000010000000e [ 83.194557][ T9266] RBP: ffffc9000209f9d0 R08: ffff88809f16c1c0 R09: ffff88809f16ca58 [ 83.194566][ T9266] R10: fffffbfff1502d58 R11: ffffffff8a816ac7 R12: ffff88809594d000 [ 83.194575][ T9266] R13: 0000000000000002 R14: 0000000000000001 R15: 000000010000000e [ 83.194586][ T9266] FS: 00000000024be880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.194595][ T9266] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.194604][ T9266] CR2: 000000010000000e CR3: 00000000a6666000 CR4: 00000000001406e0 [ 83.194616][ T9266] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.194624][ T9266] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.194628][ T9266] Call Trace: [ 83.194647][ T9266] ? reset_palette+0x190/0x190 [ 83.194663][ T9266] ? __kasan_check_read+0x11/0x20 [ 83.194682][ T9266] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 83.194700][ T9266] do_con_write.part.0+0xfd9/0x1ef0 [ 83.194724][ T9266] ? do_con_trol+0x61b0/0x61b0 [ 83.194742][ T9266] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 83.194754][ T9266] ? add_wait_queue+0x112/0x170 [ 83.194772][ T9266] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 83.194790][ T9266] ? trace_hardirqs_on+0x67/0x240 [ 83.194807][ T9266] con_write+0x46/0xd0 [ 83.194822][ T9266] n_tty_write+0x40e/0x1080 [ 83.194843][ T9266] ? n_tty_read+0x1bf0/0x1bf0 [ 83.194858][ T9266] ? prepare_to_wait_exclusive+0x320/0x320 [ 83.194876][ T9266] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.194893][ T9266] ? _copy_from_user+0x12c/0x1a0 [ 83.194910][ T9266] tty_write+0x496/0x7f0 [ 83.194922][ T9266] ? n_tty_read+0x1bf0/0x1bf0 [ 83.194938][ T9266] __vfs_write+0x8a/0x110 [ 83.194955][ T9266] ? hung_up_tty_compat_ioctl+0x40/0x40 [ 83.194970][ T9266] vfs_write+0x268/0x5d0 [ 83.194987][ T9266] ksys_write+0x14f/0x290 [ 83.195001][ T9266] ? __ia32_sys_read+0xb0/0xb0 [ 83.195018][ T9266] ? do_syscall_64+0x26/0x790 [ 83.195030][ T9266] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.195051][ T9266] ? do_syscall_64+0x26/0x790 [ 83.195068][ T9266] __x64_sys_write+0x73/0xb0 [ 83.195084][ T9266] do_syscall_64+0xfa/0x790 [ 83.195099][ T9266] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.195109][ T9266] RIP: 0033:0x4404f9 [ 83.195123][ T9266] 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 [ 83.195130][ T9266] RSP: 002b:00007ffe0ae6fcf8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 83.195143][ T9266] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 83.195151][ T9266] RDX: 0000000000000078 RSI: 0000000020000200 RDI: 0000000000000004 [ 83.195159][ T9266] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 83.195167][ T9266] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 83.195175][ T9266] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 83.195186][ T9266] Modules linked in: [ 83.195196][ T9266] CR2: 000000010000000e [ 83.195208][ T9266] ---[ end trace 449d7824cc179b3f ]--- [ 83.195223][ T9266] RIP: 0010:do_con_trol+0x47ea/0x61b0 [ 83.195236][ T9266] Code: 08 2c 01 0f 8e b1 00 00 00 4c 8b bd 08 ff ff ff 48 63 db 44 89 e9 41 0f b7 84 24 c8 03 00 00 48 01 db d1 e9 49 01 df 4c 89 ff 66 ab 49 8d bc 24 78 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 [ 83.195243][ T9266] RSP: 0018:ffffc9000209f8b0 EFLAGS: 00010202 [ 83.195254][ T9266] RAX: 0000000000000720 RBX: 0000000000000000 RCX: 0000000000000001 [ 83.195263][ T9266] RDX: 1ffff11012b29a79 RSI: ffffffff83e2aa0d RDI: 000000010000000e [ 83.195272][ T9266] RBP: ffffc9000209f9d0 R08: ffff88809f16c1c0 R09: ffff88809f16ca58 [ 83.195281][ T9266] R10: fffffbfff1502d58 R11: ffffffff8a816ac7 R12: ffff88809594d000 [ 83.195289][ T9266] R13: 0000000000000002 R14: 0000000000000001 R15: 000000010000000e [ 83.195300][ T9266] FS: 00000000024be880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.195310][ T9266] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.195318][ T9266] CR2: 000000010000000e CR3: 00000000a6666000 CR4: 00000000001406e0 [ 83.195329][ T9266] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.195338][ T9266] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.195344][ T9266] Kernel panic - not syncing: Fatal exception [ 83.196679][ T9266] Kernel Offset: disabled [ 83.706101][ T9266] Rebooting in 86400 seconds..