[ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ 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... Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.104' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 26.967137] kasan: CONFIG_KASAN_INLINE enabled [ 26.971818] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 26.979162] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 26.985364] Modules linked in: [ 26.988532] CPU: 0 PID: 8014 Comm: syz-executor419 Not tainted 4.14.274-syzkaller #0 [ 26.996380] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.005725] task: ffff888099f66680 task.stack: ffff8880b33f8000 [ 27.011759] RIP: 0010:llc_ui_autobind.isra.0+0x26b/0x390 [ 27.017178] RSP: 0018:ffff8880b33ffcc8 EFLAGS: 00010202 [ 27.022513] RAX: dffffc0000000000 RBX: ffff8880b31bf540 RCX: 1ffff110133ecde5 [ 27.029789] RDX: 00000000000000a8 RSI: ffff888099f66f08 RDI: 0000000000000540 [ 27.037040] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 27.044288] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 27.051539] R13: ffff8880b33ffe28 R14: 0000000000000010 R15: ffff8880a87c9520 [ 27.058788] FS: 00005555556c0300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 27.067012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.072878] CR2: 0000000020000184 CR3: 00000000ac051000 CR4: 00000000003406f0 [ 27.080123] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.087365] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.094626] Call Trace: [ 27.097195] llc_ui_connect+0x4b9/0xab0 [ 27.101145] ? lock_downgrade+0x740/0x740 [ 27.105270] ? llc_ui_autobind.isra.0+0x390/0x390 [ 27.110101] ? __might_fault+0x177/0x1b0 [ 27.114139] ? _copy_from_user+0x96/0x100 [ 27.118260] ? security_socket_connect+0x83/0xb0 [ 27.123000] ? llc_ui_autobind.isra.0+0x390/0x390 [ 27.127816] SyS_connect+0x1f4/0x240 [ 27.131500] ? SyS_accept+0x30/0x30 [ 27.135113] ? up_read+0x17/0x30 [ 27.138464] ? __do_page_fault+0x159/0xad0 [ 27.142671] ? do_syscall_64+0x4c/0x640 [ 27.146617] ? SyS_accept+0x30/0x30 [ 27.150322] do_syscall_64+0x1d5/0x640 [ 27.154181] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 27.159342] RIP: 0033:0x7f251ee52009 [ 27.163024] RSP: 002b:00007ffe81751278 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 27.170717] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f251ee52009 [ 27.177959] RDX: 0000000000000010 RSI: 0000000020000180 RDI: 0000000000000003 [ 27.185201] RBP: 00007f251ee15ff0 R08: 0000000000000000 R09: 0000000000000000 [ 27.192457] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f251ee16080 [ 27.199698] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.206952] Code: 55 ff ff 48 0f ba 73 60 08 45 31 e4 31 ed e8 dd 7c 84 fb 48 8d bd 40 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 f2 00 00 00 48 8b 85 40 05 00 00 65 ff 08 44 [ 27.226014] RIP: llc_ui_autobind.isra.0+0x26b/0x390 RSP: ffff8880b33ffcc8 [ 27.240685] ---[ end trace 5d7a90ab55e29fff ]--- [ 27.245460] Kernel panic - not syncing: Fatal exception [ 27.250985] Kernel Offset: disabled [ 27.254594] Rebooting in 86400 seconds..