[PATCH] xl: properly dispose of libxl_dominfo struct instances

[Jan Beulich <jbeulich@suse.com>]

The ssid_label field requires separate freeing; make sure to call
libxl_dominfo_dispose(). And then, for good measure, also
libxl_dominfo_init().

Coverity-ID: 1638727
Coverity-ID: 1638728
Fixes: c458c404da16 ("xl: use libxl_domain_info to get the uuid in printf_info")
Fixes: 48dab9767d2e ("tools/xl: use libxl_domain_info to get domain type for vcpu-pin")
Signed-off-by: Jan Beulich <jbeulich@suse.com>
---
I wasn't quite sure about use of libxl_dominfo_init(): vcpuset(), for
example, doesn't call it.

--- a/tools/xl/xl_sxp.c
+++ b/tools/xl/xl_sxp.c
@@ -45,8 +45,10 @@ void printf_info_sexp(int domid, libxl_d
     /* retrieve the UUID from dominfo, since it is probably generated
      * during parsing and thus does not match the real one
      */
+    libxl_dominfo_init(&info);
     if (libxl_domain_info(ctx, &info, domid) == 0) {
         fprintf(fh, "\t(uuid " LIBXL_UUID_FMT ")\n", LIBXL_UUID_BYTES(info.uuid));
+        libxl_dominfo_dispose(&info);
     } else {
         fprintf(fh, "\t(uuid <unknown>)\n");
     }
--- a/tools/xl/xl_vcpu.c
+++ b/tools/xl/xl_vcpu.c
@@ -286,6 +286,8 @@ int main_vcpupin(int argc, char **argv)
     if (!ignore_masks && hard) {
         libxl_dominfo dominfo;
 
+        libxl_dominfo_init(&dominfo);
+
         if (libxl_domain_info(ctx, &dominfo, domid)) {
             fprintf(stderr, "Could not get domain info\n");
             goto out;
@@ -293,6 +295,8 @@ int main_vcpupin(int argc, char **argv)
 
         /* HVM and PVH domains use the same global affinity mask */
         apply_global_affinity_masks(dominfo.domain_type, hard, 1);
+
+        libxl_dominfo_dispose(&dominfo);
     }
 
     if (force) {