elf: Ignore LD_LIBRARY_PATH and debug env var for setuid for static

It mimics the ld.so behavior.

Checked on x86_64-linux-gnu.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

diff --git a/elf/dl-support.c b/elf/dl-support.c
index 31a608df87f6693bdab4cd61596174f72d977e43..837fa1c83605b244ffae3bf13456a221e5dc8018 100644 (file)
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -272,8 +272,6 @@ _dl_non_dynamic_init (void)
   _dl_main_map.l_phdr = GL(dl_phdr);
   _dl_main_map.l_phnum = GL(dl_phnum);
 
-  _dl_verbose = *(getenv ("LD_WARN") ?: "") == '\0' ? 0 : 1;
-
   /* Set up the data structures for the system-supplied DSO early,
      so they can influence _dl_init_paths.  */
   setup_vdso (NULL, NULL);
@@ -281,6 +279,22 @@ _dl_non_dynamic_init (void)
   /* With vDSO setup we can initialize the function pointers.  */
   setup_vdso_pointers ();
 
+  if (__libc_enable_secure)
+    {
+      static const char unsecure_envvars[] =
+       UNSECURE_ENVVARS
+       ;
+      const char *cp = unsecure_envvars;
+
+      while (cp < unsecure_envvars + sizeof (unsecure_envvars))
+       {
+         __unsetenv (cp);
+         cp = strchr (cp, '\0') + 1;
+       }
+    }
+
+  _dl_verbose = *(getenv ("LD_WARN") ?: "") == '\0' ? 0 : 1;
+
   /* Initialize the data structures for the search paths for shared
      objects.  */
   _dl_init_paths (getenv ("LD_LIBRARY_PATH"), "LD_LIBRARY_PATH",
@@ -297,20 +311,6 @@ _dl_non_dynamic_init (void)
 
   _dl_dynamic_weak = *(getenv ("LD_DYNAMIC_WEAK") ?: "") == '\0';
 
-  if (__libc_enable_secure)
-    {
-      static const char unsecure_envvars[] =
-       UNSECURE_ENVVARS
-       ;
-      const char *cp = unsecure_envvars;
-
-      while (cp < unsecure_envvars + sizeof (unsecure_envvars))
-       {
-         __unsetenv (cp);
-         cp = strchr (cp, '\0') + 1;
-       }
-    }
-
 #ifdef DL_PLATFORM_INIT
   DL_PLATFORM_INIT;
 #endif