[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 73.508899][ T27] audit: type=1800 audit(1579338908.340:25): pid=9628 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 73.544456][ T27] audit: type=1800 audit(1579338908.340:26): pid=9628 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 73.585532][ T27] audit: type=1800 audit(1579338908.350:27): pid=9628 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 '10.128.10.59' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 83.635315][ T9781] BUG: unable to handle page fault for address: 000000010000000e [ 83.635325][ T9781] #PF: supervisor write access in kernel mode [ 83.635332][ T9781] #PF: error_code(0x0002) - not-present page [ 83.635337][ T9781] PGD 9f3a1067 P4D 9f3a1067 PUD 0 [ 83.635357][ T9781] Oops: 0002 [#1] PREEMPT SMP KASAN [ 83.635371][ T9781] CPU: 1 PID: 9781 Comm: syz-executor419 Not tainted 5.5.0-rc6-next-20200116-syzkaller #0 [ 83.635377][ T9781] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 83.635396][ T9781] RIP: 0010:csi_J+0x2bf/0xb00 [ 83.635409][ T9781] 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 fa 41 84 [ 83.635416][ T9781] RSP: 0018:ffffc90002047860 EFLAGS: 00010202 [ 83.635425][ T9781] RAX: 0000000000000720 RBX: ffff8880a07c8000 RCX: 0000000000000001 [ 83.635434][ T9781] RDX: 1ffff110140f9079 RSI: ffffffff83f156c6 RDI: 000000010000000e [ 83.635441][ T9781] RBP: ffffc900020478a0 R08: ffff88808f65c280 R09: ffff88808f65cb18 [ 83.635449][ T9781] R10: fffffbfff154a5c8 R11: ffffffff8aa52e47 R12: 000000010000000e [ 83.635457][ T9781] R13: 7fffffff80000001 R14: 0000000000000011 R15: 0000000000000000 [ 83.635468][ T9781] FS: 000000000115f880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.635477][ T9781] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.635485][ T9781] CR2: 000000010000000e CR3: 000000008d1be000 CR4: 00000000001406e0 [ 83.635498][ T9781] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.635505][ T9781] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.635509][ T9781] Call Trace: [ 83.635526][ T9781] ? __atomic_notifier_call_chain+0xd6/0x1a0 [ 83.635539][ T9781] do_con_trol+0x50cc/0x61b0 [ 83.635553][ T9781] ? reset_palette+0x190/0x190 [ 83.635569][ T9781] ? __kasan_check_read+0x11/0x20 [ 83.635584][ T9781] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 83.635600][ T9781] do_con_write.part.0+0xfd9/0x1ef0 [ 83.635619][ T9781] ? do_con_trol+0x61b0/0x61b0 [ 83.635634][ T9781] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 83.635645][ T9781] ? add_wait_queue+0x112/0x170 [ 83.635659][ T9781] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 83.635676][ T9781] ? trace_hardirqs_on+0x67/0x240 [ 83.635692][ T9781] con_write+0x46/0xd0 [ 83.635705][ T9781] n_tty_write+0x40e/0x1080 [ 83.635724][ T9781] ? n_tty_read+0x1bf0/0x1bf0 [ 83.635739][ T9781] ? prepare_to_wait_exclusive+0x320/0x320 [ 83.635757][ T9781] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 83.635771][ T9781] ? _copy_from_user+0x12c/0x1a0 [ 83.635788][ T9781] tty_write+0x496/0x7f0 [ 83.635800][ T9781] ? n_tty_read+0x1bf0/0x1bf0 [ 83.635817][ T9781] __vfs_write+0x8a/0x110 [ 83.635831][ T9781] ? hung_up_tty_compat_ioctl+0x40/0x40 [ 83.635846][ T9781] vfs_write+0x268/0x5d0 [ 83.635862][ T9781] ksys_write+0x14f/0x290 [ 83.635878][ T9781] ? __ia32_sys_read+0xb0/0xb0 [ 83.635895][ T9781] ? do_syscall_64+0x26/0x790 [ 83.635911][ T9781] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.635924][ T9781] ? do_syscall_64+0x26/0x790 [ 83.635942][ T9781] __x64_sys_write+0x73/0xb0 [ 83.635958][ T9781] do_syscall_64+0xfa/0x790 [ 83.635975][ T9781] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 83.635985][ T9781] RIP: 0033:0x4404f9 [ 83.635998][ T9781] 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 [ 83.636006][ T9781] RSP: 002b:00007ffcd8baf5c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 83.636019][ T9781] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 83.636027][ T9781] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 83.636035][ T9781] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 83.636042][ T9781] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 83.636050][ T9781] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 83.636062][ T9781] Modules linked in: [ 83.636071][ T9781] CR2: 000000010000000e [ 83.636084][ T9781] ---[ end trace 659c68b42cc0d92c ]--- [ 83.636100][ T9781] RIP: 0010:csi_J+0x2bf/0xb00 [ 83.636113][ T9781] 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 fa 41 84 [ 83.636121][ T9781] RSP: 0018:ffffc90002047860 EFLAGS: 00010202 [ 83.636131][ T9781] RAX: 0000000000000720 RBX: ffff8880a07c8000 RCX: 0000000000000001 [ 83.636140][ T9781] RDX: 1ffff110140f9079 RSI: ffffffff83f156c6 RDI: 000000010000000e [ 83.636149][ T9781] RBP: ffffc900020478a0 R08: ffff88808f65c280 R09: ffff88808f65cb18 [ 83.636157][ T9781] R10: fffffbfff154a5c8 R11: ffffffff8aa52e47 R12: 000000010000000e [ 83.636165][ T9781] R13: 7fffffff80000001 R14: 0000000000000011 R15: 0000000000000000 [ 83.636176][ T9781] FS: 000000000115f880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 83.636184][ T9781] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 83.636192][ T9781] CR2: 000000010000000e CR3: 000000008d1be000 CR4: 00000000001406e0 [ 83.636200][ T9781] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 83.636207][ T9781] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 83.636213][ T9781] Kernel panic - not syncing: Fatal exception [ 83.637507][ T9781] Kernel Offset: disabled [ 84.155238][ T9781] Rebooting in 86400 seconds..