File libxl-dont-try-to-free-a-NULL-list-of-vcpus.patch of Package xen.23269

References: bsc#1191668, bsc#1194267

If libxl_vcpu_list() returned NULL, we should not call
libxl_numainfo_list_free() as:
1) it'll fail trying to (double) free() *list
2) there should be nothing to free anyway

Signed-off-by: Dario Faggioli <dfaggioli@xxxxxxxx>
Tested-by: James Fehlig <jfehlig@xxxxxxxx>
---
Cc: Wei Liu <wl@xxxxxxx>
Cc: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx>
---
 tools/libs/light/libxl_numa.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libxl/libxl_numa.c b/tools/libxl/libxl_numa.c
index a8a75f89e9..3679028c79 100644
--- a/tools/libxl/libxl_numa.c
+++ b/tools/libxl/libxl_numa.c
@@ -253,9 +253,9 @@ static int nr_vcpus_on_nodes(libxl__gc *gc, libxl_cputopology *tinfo,
             }
         }
 
+        libxl_vcpuinfo_list_free(vinfo, nr_dom_vcpus);
  next:
         libxl_cpupoolinfo_dispose(&cpupool_info);
-        libxl_vcpuinfo_list_free(vinfo, nr_dom_vcpus);
     }
 
     libxl_bitmap_dispose(&dom_nodemap);