libctf: avoid potential double free

	* ctf-link.c (ctf_link_add_cu_mapping): Set t NULL after free.

diff --git a/libctf/ctf-link.c b/libctf/ctf-link.c
index 702f2b4d5feac154ebba5998c6de600b2a4e6506..902b4408cd66197059cda7a91193317f6502b970 100644 (file)
--- a/libctf/ctf-link.c
+++ b/libctf/ctf-link.c
@@ -431,7 +431,10 @@ ctf_link_add_cu_mapping (ctf_dict_t *fp, const char *from, const char *to)
        }
     }
   else
-    free (t);
+    {
+      free (t);
+      t = NULL;
+    }
 
   if (ctf_dynhash_insert (one_out, f, NULL) < 0)
     {