vmd(8): prevent crashing when presented with a vm name argument to

"vmctl stop" that doesn't exist.

Diff from Pratik Vyas, thanks!

diff --git a/usr.sbin/vmd/vmd.c b/usr.sbin/vmd/vmd.c
index 013bf26..440d64f 100644 (file)
--- a/usr.sbin/vmd/vmd.c
+++ b/usr.sbin/vmd/vmd.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: vmd.c,v 1.61 2017/05/04 19:41:58 reyk Exp $   */
+/*     $OpenBSD: vmd.c,v 1.62 2017/05/29 07:15:22 mlarkin Exp $        */
 
 /*
  * Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org>
@@ -116,8 +116,11 @@ vmd_dispatch_control(int fd, struct privsep_proc *p, struct imsg *imsg)
                                break;
                        }
                        id = vm->vm_vmid;
-               } else
-                       vm = vm_getbyvmid(id);
+               } else if ((vm = vm_getbyvmid(id)) == NULL) {
+                       res = ENOENT;
+                       cmd = IMSG_VMDOP_TERMINATE_VM_RESPONSE;
+                       break;
+               }
                if (vm_checkperm(vm, vid.vid_uid) != 0) {
                        res = EPERM;
                        cmd = IMSG_VMDOP_TERMINATE_VM_RESPONSE;