libxl: fix memory leak in libxl_name_to_domid

Found with "valgrind xl destroy ...":
==16272== 53,248 bytes in 1 blocks are definitely lost in loss record 6 of 6
==16272==    at 0x4022249: calloc (vg_replace_malloc.c:467)
==16272==    by 0x403FD4A: libxl_list_domain (libxl.c:490)
==16272==    by 0x404B901: libxl_name_to_domid (libxl_utils.c:65)
==16272==    by 0x804B4D2: domain_qualifier_to_domid (xl_cmdimpl.c:181)
==16272==    by 0x804B50F: find_domain (xl_cmdimpl.c:198)
==16272==    by 0x804D70C: destroy_domain (xl_cmdimpl.c:2104)
==16272==    by 0x8054E4C: main_destroy (xl_cmdimpl.c:2912)
==16272==    by 0x804B2FB: main (xl.c:76)

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

diff --git a/tools/libxl/libxl_utils.c b/tools/libxl/libxl_utils.c
index 0b330b27600441dbc5ebb7b2123f5efd7d7e427a..8a1fa5af751f32dc5bb2126800ab689ba7db0cfe 100644 (file)
--- a/tools/libxl/libxl_utils.c
+++ b/tools/libxl/libxl_utils.c
@@ -61,6 +61,7 @@ int libxl_name_to_domid(libxl_ctx *ctx, const char *name,
     int i, nb_domains;
     char *domname;
     libxl_dominfo *dominfo;
+    int ret = -1;
 
     dominfo = libxl_list_domain(ctx, &nb_domains);
     if (!dominfo)
@@ -72,10 +73,12 @@ int libxl_name_to_domid(libxl_ctx *ctx, const char *name,
             continue;
         if (strcmp(domname, name) == 0) {
             *domid = dominfo[i].domid;
-            return 0;
+            ret = 0;
+            break;
         }
     }
-    return -1;
+    free(dominfo);
+    return ret;
 }
 
 char *libxl_poolid_to_name(libxl_ctx *ctx, uint32_t poolid)