[ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.154' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 29.674789] divide error: 0000 [#1] PREEMPT SMP KASAN [ 29.674792] Modules linked in: [ 29.674798] CPU: 0 PID: 7973 Comm: syz-executor925 Not tainted 4.14.232-syzkaller #0 [ 29.674801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.674804] task: ffff888095b42480 task.stack: ffff8880939e8000 [ 29.674823] RIP: 0010:fbcon_init+0xcb4/0x1cc0 [ 29.674825] RSP: 0018:ffff8880939ef7e0 EFLAGS: 00010246 [ 29.674829] RAX: 0000000000000000 RBX: ffff8880b0f2c280 RCX: 1ffff110161e5887 [ 29.674831] RDX: 0000000000000000 RSI: ffff88809364f874 RDI: ffff8880b0f2c438 [ 29.674833] RBP: ffff88809364f4c0 R08: ffffffff8b9c43f8 R09: 0000000000000000 [ 29.674835] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882388249c0 [ 29.674837] R13: 0000000000000000 R14: ffff88809364f7f4 R15: 0000000000000000 [ 29.674841] FS: 0000000000ef4300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 29.674843] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.674846] CR2: 0000000000496dd3 CR3: 00000000ac01a000 CR4: 00000000001406f0 [ 29.674850] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.674852] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.674854] Call Trace: [ 29.674863] visual_init+0x332/0x5e0 [ 29.674868] vc_allocate+0x2c5/0x640 [ 29.674874] ? lock_acquire+0x170/0x3f0 [ 29.674877] ? vc_cons_allocated+0x70/0x70 [ 29.674882] con_install+0x4d/0x450 [ 29.674885] ? vc_allocate+0x640/0x640 [ 29.674891] tty_init_dev.part.0+0x99/0x400 [ 29.674895] tty_open+0x669/0x8b0 [ 29.674899] ? tty_kopen+0x1c0/0x1c0 [ 29.674903] ? tty_kopen+0x1c0/0x1c0 [ 29.674908] chrdev_open+0x23c/0x6d0 [ 29.674911] ? __register_chrdev+0x3d0/0x3d0 [ 29.674917] do_dentry_open+0x44b/0xec0 [ 29.674920] ? __register_chrdev+0x3d0/0x3d0 [ 29.674953] ? __inode_permission+0xcd/0x2f0 [ 29.674958] vfs_open+0x105/0x220 [ 29.674963] path_openat+0x628/0x2970 [ 29.674968] ? path_lookupat+0x780/0x780 [ 29.674972] ? trace_hardirqs_on+0x10/0x10 [ 29.674976] ? lock_downgrade+0x740/0x740 [ 29.674981] do_filp_open+0x179/0x3c0 [ 29.674985] ? may_open_dev+0xe0/0xe0 [ 29.674991] ? do_raw_spin_unlock+0x164/0x220 [ 29.674996] ? __alloc_fd+0x1be/0x490 [ 29.675000] do_sys_open+0x296/0x410 [ 29.675004] ? filp_open+0x60/0x60 [ 29.675011] ? __do_page_fault+0x159/0xad0 [ 29.675016] ? do_syscall_64+0x4c/0x640 [ 29.675030] ? SyS_open+0x30/0x30 [ 29.675034] do_syscall_64+0x1d5/0x640 [ 29.675040] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.675043] RIP: 0033:0x402427 [ 29.675045] RSP: 002b:00007fff1a4c4f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 29.675049] RAX: ffffffffffffffda RBX: 0000000000007387 RCX: 0000000000402427 [ 29.675051] RDX: 0000000000000002 RSI: 00007fff1a4c4f90 RDI: 00000000ffffff9c [ 29.675054] RBP: 00007fff1a4c4f90 R08: 0000000000000000 R09: 000000000000000e [ 29.675056] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 [ 29.675058] R13: 431bde82d7b634db R14: 00000000004ae018 R15: 0000000000400488 [ 29.675062] 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 [ 29.675138] RIP: fbcon_init+0xcb4/0x1cc0 RSP: ffff8880939ef7e0 [ 29.675144] ---[ end trace ca7c0bef52b7b01e ]--- [ 29.675147] Kernel panic - not syncing: Fatal exception [ 29.675572] Kernel Offset: disabled [ 29.999152] Rebooting in 86400 seconds..