Update.

2000-12-08  Jakub Jelinek  <jakub@redhat.com>

	* elf/dl-open.c (_dl_open): If objname points right after errstring,
	allocate it together with errstring using alloca.
	* elf/dl-error.c (_dl_signal_error): If malloc failed, set objname
	to "", because it might point to local stack.

2 files changed, 16 insertions, 2 deletions

diff --git a/elf/dl-error.c b/elf/dl-error.c
index 1c6de64..83d984f 100644
--- a/elf/dl-error.c
+++ b/elf/dl-error.c
@@ -88,7 +88,7 @@ _dl_signal_error (int errcode, const char *objname, const char *errstring)
       else
 	{
 	  /* This is better than nothing.  */
-	  lcatch->objname = objname;
+	  lcatch->objname = "";
 	  lcatch->errstring = _dl_out_of_memory;
 	}
       longjmp (lcatch->env, errcode ?: -1);
diff --git a/elf/dl-open.c b/elf/dl-open.c
index 48bb9f8..9035579 100644
--- a/elf/dl-open.c
+++ b/elf/dl-open.c
@@ -391,6 +391,7 @@ _dl_open (const char *file, int mode, const void *caller)
     {
       /* Some error occurred during loading.  */
       char *local_errstring;
+      size_t len_errstring;
 
       /* Remove the object from memory.  It may be in an inconsistent
 	 state if relocation failed, for example.  */
@@ -399,7 +400,20 @@ _dl_open (const char *file, int mode, const void *caller)
 
       /* Make a local copy of the error string so that we can release the
 	 memory allocated for it.  */
-      local_errstring = strdupa (errstring);
+      len_errstring = strlen (errstring) + 1;
+      if (objname == errstring + len_errstring)
+	{
+	  len_errstring += strlen (objname) + 1;
+	  local_errstring = alloca (len_errstring);
+	  memcpy (local_errstring, errstring, len_errstring);
+	  objname = local_errstring + len_errstring;
+	}
+      else
+	{
+	  local_errstring = alloca (len_errstring);
+	  memcpy (local_errstring, errstring, len_errstring);
+	}
+
       if (errstring != _dl_out_of_memory)
 	free ((char *) errstring);