[ OK ] Started Getty on tty2. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Found device /dev/ttyS0. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Serial Getty on ttyS0. [ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.52' (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: [ 28.901862] divide error: 0000 [#1] PREEMPT SMP KASAN [ 28.901867] Modules linked in: [ 28.901877] CPU: 0 PID: 7989 Comm: syz-executor338 Not tainted 4.14.239-syzkaller #0 [ 28.901880] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.901884] task: ffff8880958a25c0 task.stack: ffff888098cf8000 [ 28.901897] RIP: 0010:fbcon_init+0xcb4/0x1cc0 [ 28.901900] RSP: 0018:ffff888098cff7e0 EFLAGS: 00010246 [ 28.901905] RAX: 00000000000003c0 RBX: ffff8880b09d3800 RCX: 1ffff1101613a737 [ 28.901908] RDX: 0000000000000000 RSI: ffff888095a50474 RDI: ffff8880b09d39b8 [ 28.901911] RBP: ffff888095a500c0 R08: ffffffff8b9c42e0 R09: 0000000000000000 [ 28.901914] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882389188c0 [ 28.901917] R13: 0000000000000000 R14: ffff888095a503f4 R15: 00000000000003c0 [ 28.901922] FS: 0000000000e2e300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 28.901925] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.901928] CR2: 0000000000496dd3 CR3: 00000000ab90b000 CR4: 00000000001406f0 [ 28.901936] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.901939] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.901941] Call Trace: [ 28.901955] visual_init+0x332/0x5e0 [ 28.901964] vc_allocate+0x2c5/0x640 [ 28.901972] ? lock_acquire+0x170/0x3f0 [ 28.901983] ? vc_cons_allocated+0x70/0x70 [ 28.901991] con_install+0x4d/0x450 [ 28.901997] ? vc_allocate+0x640/0x640 [ 28.902006] tty_init_dev.part.0+0x99/0x400 [ 28.902013] tty_open+0x669/0x8b0 [ 28.902021] ? tty_kopen+0x1c0/0x1c0 [ 28.902028] ? tty_kopen+0x1c0/0x1c0 [ 28.902034] chrdev_open+0x23c/0x6d0 [ 28.902040] ? __register_chrdev+0x3d0/0x3d0 [ 28.902049] do_dentry_open+0x44b/0xec0 [ 28.902054] ? __register_chrdev+0x3d0/0x3d0 [ 28.902062] ? __inode_permission+0xcd/0x2f0 [ 28.902069] vfs_open+0x105/0x220 [ 28.902078] path_openat+0x628/0x2970 [ 28.902087] ? path_lookupat+0x780/0x780 [ 28.902094] ? trace_hardirqs_on+0x10/0x10 [ 28.902101] ? lock_downgrade+0x740/0x740 [ 28.902111] do_filp_open+0x179/0x3c0 [ 28.902118] ? may_open_dev+0xe0/0xe0 [ 28.902129] ? do_raw_spin_unlock+0x164/0x220 [ 28.902137] ? __alloc_fd+0x1be/0x490 [ 28.902146] do_sys_open+0x296/0x410 [ 28.902152] ? filp_open+0x60/0x60 [ 28.902162] ? __do_page_fault+0x159/0xad0 [ 28.902169] ? do_syscall_64+0x4c/0x640 [ 28.902175] ? SyS_open+0x30/0x30 [ 28.902181] do_syscall_64+0x1d5/0x640 [ 28.902191] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.902197] RIP: 0033:0x402487 [ 28.902200] RSP: 002b:00007ffcc5102f10 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 28.902207] RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 0000000000402487 [ 28.902210] RDX: 0000000000000002 RSI: 00007ffcc5102fa0 RDI: 00000000ffffff9c [ 28.902214] RBP: 00007ffcc5102fa0 R08: 0000000000000000 R09: 000000000000000e [ 28.902216] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 [ 28.902219] R13: 00007ffcc510303c R14: 00007ffcc5103050 R15: 00007ffcc5103040 [ 28.902225] 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 [ 28.902342] RIP: fbcon_init+0xcb4/0x1cc0 RSP: ffff888098cff7e0 [ 28.902448] ---[ end trace 3a5b89be4651ff8d ]--- [ 28.902453] Kernel panic - not syncing: Fatal exception [ 28.903414] Kernel Offset: disabled