On Fri, Apr 02, 2021 at 07:14:34PM -0400, Dave Voutila wrote:
> If vmctl(8) sends an unpause request for a vm that doesn't exist, vmd(8)
> should be responding with the IMSG_VMDOP_UNPAUSE_VM_RESPONSE imsg_type
> with an ENOENT error code. (Similarly if the request comes from a user
> without permissions to unpause, the error is EPERM but the imsg_type is
> wrong.)
>
> Since the handling for pause/unpause are the same code path, vmd(8) is
> sending an IMSG_VMDOP_PAUSE_VM_RESPONSE in these situations (i.e. on an
> error unpausing).
>
> The below diff sets the cmd correctly based on the imsg being
> processed.
>
> For context, case statement in this switch block looks like:
>
> case IMSG_VMDOP_PAUSE_VM:
> case IMSG_VMDOP_UNPAUSE_VM:
> IMSG_SIZE_CHECK(imsg, &vid);
> memcpy(&vid, imsg->data, sizeof(vid));
> ...<the below diff>...
>
> OK?
>
> -dv
>
This is ok mlarkin@ if it wasn't already committed.
-ml
>
> Index: usr.sbin/vmd/vmd.c
> ===================================================================
> RCS file: /cvs/src/usr.sbin/vmd/vmd.c,v
> retrieving revision 1.121
> diff -u -p -r1.121 vmd.c
> --- usr.sbin/vmd/vmd.c 29 Mar 2021 23:37:01 -0000 1.121
> +++ usr.sbin/vmd/vmd.c 2 Apr 2021 23:06:47 -0000
> @@ -203,20 +203,26 @@ vmd_dispatch_control(int fd, struct priv
> if (vid.vid_id == 0) {
> if ((vm = vm_getbyname(vid.vid_name)) == NULL) {
> res = ENOENT;
> - cmd = IMSG_VMDOP_PAUSE_VM_RESPONSE;
> + cmd = imsg->hdr.type == IMSG_VMDOP_PAUSE_VM
> + ? IMSG_VMDOP_PAUSE_VM_RESPONSE
> + : IMSG_VMDOP_UNPAUSE_VM_RESPONSE;
> break;
> } else {
> vid.vid_id = vm->vm_vmid;
> }
> } else if ((vm = vm_getbyid(vid.vid_id)) == NULL) {
> res = ENOENT;
> - cmd = IMSG_VMDOP_PAUSE_VM_RESPONSE;
> + cmd = imsg->hdr.type == IMSG_VMDOP_PAUSE_VM
> + ? IMSG_VMDOP_PAUSE_VM_RESPONSE
> + : IMSG_VMDOP_UNPAUSE_VM_RESPONSE;
> break;
> }
> if (vm_checkperm(vm, &vm->vm_params.vmc_owner,
> vid.vid_uid) != 0) {
> res = EPERM;
> - cmd = IMSG_VMDOP_PAUSE_VM_RESPONSE;
> + cmd = imsg->hdr.type == IMSG_VMDOP_PAUSE_VM
> + ? IMSG_VMDOP_PAUSE_VM_RESPONSE
> + : IMSG_VMDOP_UNPAUSE_VM_RESPONSE;
> break;
> }
> proc_compose_imsg(ps, PROC_VMM, -1, imsg->hdr.type,
>
