[ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.80' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 29.775399] divide error: 0000 [#1] PREEMPT SMP KASAN [ 29.775402] Modules linked in: [ 29.775411] CPU: 0 PID: 8025 Comm: syz-executor637 Not tainted 4.14.212-syzkaller #0 [ 29.775415] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.775419] task: ffff8880b2e1e400 task.stack: ffff8880958b0000 [ 29.775437] RIP: 0010:fbcon_init+0xcb4/0x1cc0 [ 29.775440] RSP: 0018:ffff8880958b77e0 EFLAGS: 00010246 [ 29.775446] RAX: 0000000000000320 RBX: ffff8882388600c0 RCX: 1ffff1104710c04f [ 29.775450] RDX: 0000000000000000 RSI: ffff8880b4477834 RDI: ffff888238860278 [ 29.775454] RBP: ffff8880b4477480 R08: ffffffff8b9bb2e0 R09: 0000000000000000 [ 29.775458] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238854600 [ 29.775461] R13: 0000000000000000 R14: ffff8880b44777b4 R15: 0000000000000320 [ 29.775467] FS: 0000000001d7c880(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 29.775471] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.775475] CR2: 00007ffee9088e74 CR3: 00000000b01d2000 CR4: 00000000001406f0 [ 29.775482] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.775485] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.775487] Call Trace: [ 29.775502] visual_init+0x332/0x5e0 [ 29.775511] vc_allocate+0x2c5/0x640 [ 29.775518] ? lock_acquire+0x170/0x3f0 [ 29.775525] ? vc_cons_allocated+0x70/0x70 [ 29.775533] con_install+0x4d/0x450 [ 29.775545] ? vc_allocate+0x640/0x640 [ 29.775554] tty_init_dev.part.0+0x99/0x400 [ 29.775561] tty_open+0x669/0x8b0 [ 29.775568] ? tty_kopen+0x1c0/0x1c0 [ 29.775575] ? tty_kopen+0x1c0/0x1c0 [ 29.775582] chrdev_open+0x23c/0x6d0 [ 29.775588] ? __register_chrdev+0x3d0/0x3d0 [ 29.775597] do_dentry_open+0x44b/0xec0 [ 29.775603] ? __register_chrdev+0x3d0/0x3d0 [ 29.775611] ? __inode_permission+0xcd/0x2f0 [ 29.775617] vfs_open+0x105/0x220 [ 29.775624] path_openat+0x628/0x2970 [ 29.775633] ? path_lookupat+0x780/0x780 [ 29.775639] ? trace_hardirqs_on+0x10/0x10 [ 29.775648] do_filp_open+0x179/0x3c0 [ 29.775653] ? may_open_dev+0xe0/0xe0 [ 29.775665] ? do_raw_spin_unlock+0x164/0x220 [ 29.775671] ? __alloc_fd+0x1be/0x490 [ 29.775679] do_sys_open+0x296/0x410 [ 29.775686] ? filp_open+0x60/0x60 [ 29.775694] ? __do_page_fault+0x159/0xad0 [ 29.775701] ? do_syscall_64+0x4c/0x640 [ 29.775706] ? do_sys_open+0x410/0x410 [ 29.775711] do_syscall_64+0x1d5/0x640 [ 29.775720] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.775725] RIP: 0033:0x401260 [ 29.775727] RSP: 002b:00007ffee9088da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 29.775733] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000401260 [ 29.775736] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffee9088dd0 [ 29.775739] RBP: 0000000000007257 R08: 0000000000000000 R09: 000000000000000e [ 29.775742] R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000402280 [ 29.775745] R13: 0000000000402310 R14: 0000000000000000 R15: 0000000000000000 [ 29.775750] Code: 54 24 30 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 8d 0d 00 00 31 d2 44 89 f8 48 8b 74 24 38 b5 b0 03 00 00 48 89 f2 48 c1 ea 03 89 44 24 30 48 b8 00 00 [ 29.775862] RIP: fbcon_init+0xcb4/0x1cc0 RSP: ffff8880958b77e0 [ 29.776277] ---[ end trace 7c55ac9d94bbf84a ]--- [ 29.776282] Kernel panic - not syncing: Fatal exception [ 29.777055] Kernel Offset: disabled