[ 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 '10.128.1.73' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 28.197689] divide error: 0000 [#1] PREEMPT SMP KASAN [ 28.197696] Modules linked in: [ 28.197703] CPU: 1 PID: 7974 Comm: syz-executor863 Not tainted 4.14.230-syzkaller #0 [ 28.197705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.197708] task: ffff8880b4b2c340 task.stack: ffff8880b35d0000 [ 28.197716] RIP: 0010:fbcon_init+0xcb4/0x1cc0 [ 28.197718] RSP: 0018:ffff8880b35d77e0 EFLAGS: 00010246 [ 28.197722] RAX: 0000000000000000 RBX: ffff888238f2b840 RCX: 1ffff110471e573f [ 28.197725] RDX: 0000000000000000 RSI: ffff8880af7bad34 RDI: ffff888238f2b9f8 [ 28.197727] RBP: ffff8880af7ba980 R08: ffffffff8b9bfbf8 R09: 0000000000000000 [ 28.197729] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888238811180 [ 28.197732] R13: 0000000000000320 R14: ffff8880af7bacb4 R15: 0000000000000000 [ 28.197735] FS: 00000000011a1300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 28.197737] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.197739] CR2: 0000000000496dd3 CR3: 0000000096d8b000 CR4: 00000000001406e0 [ 28.197744] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.197746] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.197747] Call Trace: [ 28.197757] visual_init+0x332/0x5e0 [ 28.197762] vc_allocate+0x2c5/0x640 [ 28.197768] ? lock_acquire+0x170/0x3f0 [ 28.197771] ? vc_cons_allocated+0x70/0x70 [ 28.197776] con_install+0x4d/0x450 [ 28.197779] ? vc_allocate+0x640/0x640 [ 28.197785] tty_init_dev.part.0+0x99/0x400 [ 28.197789] tty_open+0x669/0x8b0 [ 28.197793] ? tty_kopen+0x1c0/0x1c0 [ 28.197797] ? tty_kopen+0x1c0/0x1c0 [ 28.197801] chrdev_open+0x23c/0x6d0 [ 28.197805] ? __register_chrdev+0x3d0/0x3d0 [ 28.197810] do_dentry_open+0x44b/0xec0 [ 28.197813] ? __register_chrdev+0x3d0/0x3d0 [ 28.197818] ? __inode_permission+0xcd/0x2f0 [ 28.197822] vfs_open+0x105/0x220 [ 28.197827] path_openat+0x628/0x2970 [ 28.197832] ? path_lookupat+0x780/0x780 [ 28.197836] ? trace_hardirqs_on+0x10/0x10 [ 28.197839] ? lock_downgrade+0x740/0x740 [ 28.197845] do_filp_open+0x179/0x3c0 [ 28.197849] ? may_open_dev+0xe0/0xe0 [ 28.197854] ? do_raw_spin_unlock+0x164/0x220 [ 28.197859] ? __alloc_fd+0x1be/0x490 [ 28.197864] do_sys_open+0x296/0x410 [ 28.197868] ? filp_open+0x60/0x60 [ 28.197874] ? __do_page_fault+0x159/0xad0 [ 28.197879] ? do_syscall_64+0x4c/0x640 [ 28.197882] ? SyS_open+0x30/0x30 [ 28.197885] do_syscall_64+0x1d5/0x640 [ 28.197891] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.197895] RIP: 0033:0x402447 [ 28.197897] RSP: 002b:00007ffc4b1fda50 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 28.197900] RAX: ffffffffffffffda RBX: 0000000000006dc7 RCX: 0000000000402447 [ 28.197903] RDX: 0000000000000002 RSI: 00007ffc4b1fdad0 RDI: 00000000ffffff9c [ 28.197905] RBP: 00007ffc4b1fdad0 R08: 0000000000000000 R09: 000000000000000e [ 28.197907] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 [ 28.197909] R13: 431bde82d7b634db R14: 00000000004ae018 R15: 0000000000400488 [ 28.197912] 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 [ 28.197987] RIP: fbcon_init+0xcb4/0x1cc0 RSP: ffff8880b35d77e0 [ 28.197993] ---[ end trace 0d06857c9a3a295c ]--- [ 28.197996] Kernel panic - not syncing: Fatal exception [ 28.198623] Kernel Offset: disabled [ 28.522453] Rebooting in 86400 seconds..