[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ 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 '10.128.0.37' (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 executing program syzkaller login: [ 30.110958] divide error: 0000 [#1] PREEMPT SMP KASAN [ 30.110961] Modules linked in: [ 30.110971] CPU: 0 PID: 8023 Comm: syz-executor581 Not tainted 4.14.212-syzkaller #0 [ 30.110974] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.110979] task: ffff88809192a0c0 task.stack: ffff888095fc0000 [ 30.110990] RIP: 0010:fbcon_init+0xcb4/0x1cc0 [ 30.110993] RSP: 0018:ffff888095fc77e0 EFLAGS: 00010246 [ 30.111000] RAX: 0000000000000320 RBX: ffff888238f0a840 RCX: 1ffff110471e153f [ 30.111004] RDX: 0000000000000000 RSI: ffff888091b318b4 RDI: ffff888238f0a9f8 [ 30.111009] RBP: ffff888091b31500 R08: ffffffff8b9bd3f8 R09: 0000000000000000 [ 30.111013] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b0b8edc0 [ 30.111017] R13: 0000000000000000 R14: ffff888091b31834 R15: 0000000000000320 [ 30.111023] FS: 0000000001cf3880(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 30.111027] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.111031] CR2: 00000000004b4d13 CR3: 0000000098d23000 CR4: 00000000001406f0 [ 30.111040] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.111044] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.111046] Call Trace: [ 30.111076] visual_init+0x332/0x5e0 [ 30.111085] vc_allocate+0x2c5/0x640 [ 30.111092] ? lock_acquire+0x170/0x3f0 [ 30.111099] ? vc_cons_allocated+0x70/0x70 [ 30.111107] con_install+0x4d/0x450 [ 30.111113] ? vc_allocate+0x640/0x640 [ 30.111122] tty_init_dev.part.0+0x99/0x400 [ 30.111129] tty_open+0x669/0x8b0 [ 30.111138] ? tty_kopen+0x1c0/0x1c0 [ 30.111147] ? tty_kopen+0x1c0/0x1c0 [ 30.111154] chrdev_open+0x23c/0x6d0 [ 30.111161] ? __register_chrdev+0x3d0/0x3d0 [ 30.111171] do_dentry_open+0x44b/0xec0 [ 30.111177] ? __register_chrdev+0x3d0/0x3d0 [ 30.111187] ? __inode_permission+0xcd/0x2f0 [ 30.111194] vfs_open+0x105/0x220 [ 30.111202] path_openat+0x628/0x2970 [ 30.111212] ? path_lookupat+0x780/0x780 [ 30.111218] ? trace_hardirqs_on+0x10/0x10 [ 30.111227] do_filp_open+0x179/0x3c0 [ 30.111233] ? may_open_dev+0xe0/0xe0 [ 30.111251] ? do_raw_spin_unlock+0x164/0x220 [ 30.111259] ? __alloc_fd+0x1be/0x490 [ 30.111268] do_sys_open+0x296/0x410 [ 30.111275] ? filp_open+0x60/0x60 [ 30.111284] ? __do_page_fault+0x159/0xad0 [ 30.111291] ? do_syscall_64+0x4c/0x640 [ 30.111296] ? do_sys_open+0x410/0x410 [ 30.111303] do_syscall_64+0x1d5/0x640 [ 30.111314] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 30.111319] RIP: 0033:0x401260 [ 30.111323] RSP: 002b:00007ffdfe21ffa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 30.111329] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000401260 [ 30.111333] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffdfe21ffd0 [ 30.111336] RBP: 0000000000007433 R08: 0000000000000000 R09: 000000000000000e [ 30.111340] R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000402280 [ 30.111343] R13: 0000000000402310 R14: 0000000000000000 R15: 0000000000000000 [ 30.111350] 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 [ 30.111476] RIP: fbcon_init+0xcb4/0x1cc0 RSP: ffff888095fc77e0 [ 30.111528] ---[ end trace f1a94cc7c9193deb ]--- [ 30.111532] Kernel panic - not syncing: Fatal exception [ 30.112112] Kernel Offset: disabled [ 30.435752] Rebooting in 86400 seconds..