[ 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 '10.128.0.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.063144] audit: type=1400 audit(1598931156.689:8): avc: denied { execmem } for pid=6357 comm="syz-executor020" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 executing program [ 37.195248] divide error: 0000 [#1] PREEMPT SMP KASAN [ 37.195251] Modules linked in: [ 37.195257] CPU: 1 PID: 6359 Comm: syz-executor020 Not tainted 4.14.195-syzkaller #0 [ 37.195259] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.195263] task: ffff888097aa0100 task.stack: ffff8880983c8000 [ 37.195272] RIP: 0010:fbcon_init+0xccc/0x1dd0 [ 37.195274] RSP: 0018:ffff8880983cf7d8 EFLAGS: 00010246 [ 37.195278] RAX: 0000000000000000 RBX: ffff8880a5a76040 RCX: 1ffff11014b4ec3f [ 37.195281] RDX: 0000000000000000 RSI: ffff88809787c634 RDI: ffff8880a5a761f8 [ 37.195283] RBP: ffff88809787c280 R08: ffff8880a5a76040 R09: 0000000000000000 [ 37.195285] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a5fc0b00 [ 37.195287] R13: ffff88809787c5b4 R14: 0000000000000000 R15: 0000000000000013 [ 37.195291] FS: 00000000021e4880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 37.195293] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 37.195296] CR2: 00000000004b4c53 CR3: 000000008b4ba000 CR4: 00000000001406e0 [ 37.195302] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 37.195305] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 37.195306] Call Trace: [ 37.195317] visual_init+0x332/0x5e0 [ 37.195321] vc_allocate+0x2c5/0x640 [ 37.195327] ? lock_acquire+0x170/0x3f0 [ 37.195337] ? vc_cons_allocated+0x70/0x70 [ 37.195342] con_install+0x4d/0x450 [ 37.195345] ? vc_allocate+0x640/0x640 [ 37.195351] tty_init_dev.part.0+0x99/0x400 [ 37.195356] tty_open+0x669/0x8b0 [ 37.195361] ? tty_kopen+0x1c0/0x1c0 [ 37.195365] ? tty_kopen+0x1c0/0x1c0 [ 37.195371] chrdev_open+0x23c/0x6d0 [ 37.195375] ? __register_chrdev+0x3d0/0x3d0 [ 37.195382] do_dentry_open+0x44b/0xec0 [ 37.195386] ? __register_chrdev+0x3d0/0x3d0 [ 37.195390] ? __inode_permission+0xcd/0x2f0 [ 37.195394] vfs_open+0x105/0x220 [ 37.195398] path_openat+0x628/0x2970 [ 37.195404] ? path_lookupat+0x780/0x780 [ 37.195408] ? trace_hardirqs_on+0x10/0x10 [ 37.195414] do_filp_open+0x179/0x3c0 [ 37.195418] ? may_open_dev+0xe0/0xe0 [ 37.195425] ? do_raw_spin_unlock+0x164/0x220 [ 37.195432] ? __alloc_fd+0x1be/0x490 [ 37.195440] do_sys_open+0x296/0x410 [ 37.195446] ? filp_open+0x60/0x60 [ 37.195454] ? __do_page_fault+0x19a/0xb50 [ 37.195462] ? do_syscall_64+0x4c/0x640 [ 37.195466] ? do_sys_open+0x410/0x410 [ 37.195474] do_syscall_64+0x1d5/0x640 [ 37.195486] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 37.195492] RIP: 0033:0x401200 [ 37.195495] RSP: 002b:00007ffe8b227c38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 37.195501] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000401200 [ 37.195504] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007ffe8b227c50 [ 37.195507] RBP: 00000000000090da R08: 0000000000000000 R09: 000000000000000e [ 37.195509] R10: 0000000000000064 R11: 0000000000000246 R12: 0000000000402220 [ 37.195511] R13: 00000000004022b0 R14: 0000000000000000 R15: 0000000000000000 [ 37.195515] Code: 24 38 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 ad 0d 00 00 8b 44 24 20 31 d2 48 8b 74 24 40 b5 b0 03 00 00 48 89 f2 48 c1 ea 03 89 44 24 20 48 b8 00 00 [ 37.195592] RIP: fbcon_init+0xccc/0x1dd0 RSP: ffff8880983cf7d8 [ 37.195599] ---[ end trace b869460e63b467a3 ]--- [ 37.195602] Kernel panic - not syncing: Fatal exception [ 37.196762] Kernel Offset: disabled [ 37.517219] Rebooting in 86400 seconds..