Fix problem with empty LD_PRELOAD value.

diff --git a/elf/rtld.c b/elf/rtld.c
index 9f6f1136f3d976af9faf371c78c41cfd6272b488..e26e4574ad59ddb6665b35905c66f2bcee37c1bd 100644 (file)
--- a/elf/rtld.c
+++ b/elf/rtld.c
@@ -364,7 +364,8 @@ of this helper program; chances are you did not intend to run this program.\n",
         containing a '/' are ignored since it is insecure.  */
       char *list = strdupa (preloadlist);
       char *p;
-      while ((p = strsep (&list, " :")) != NULL)
+      list += strspn (list, " :");
+      while (*list && (p = strsep (&list, " :")) != NULL)
        if (! __libc_enable_secure || strchr (p, '/') == NULL)
          {
            struct link_map *new_map = _dl_map_object (l, p, 1, lt_library, 0);
@@ -372,6 +373,8 @@ of this helper program; chances are you did not intend to run this program.\n",
              /* It is no duplicate.  */
              ++npreloads;
          }
+      if (list != NULL)
+       list += strspn (list, " :");
     }
 
   /* Read the contents of the file.  */
@@ -427,7 +430,7 @@ of this helper program; chances are you did not intend to run this program.\n",
        {
          char *p;
          runp = file + strspn (file, ": \t\n");
-         while ((p = strsep (&runp, ": \t\n")) != NULL)
+         while (*runp && (p = strsep (&runp, ": \t\n")) != NULL)
            {
              struct link_map *new_map = _dl_map_object (l, p, 1,
                                                         lt_library, 0);