From 703ccc12453bbe0111b758637445386ed834b8ae Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Mon, 20 Sep 2004 15:15:23 +0000
Subject: (_dl_map_object_from_fd): Add caller check.

---
 elf/dl-load.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'elf/dl-load.c')

diff --git a/elf/dl-load.c b/elf/dl-load.c
index fad456f02c..e4f85a9cc8 100644
--- a/elf/dl-load.c
+++ b/elf/dl-load.c
@@ -35,6 +35,7 @@
 #include <abi-tag.h>
 #include <dl-osinfo.h>
 #include <stackinfo.h>
+#include <caller.h>
 
 #include <dl-dst.h>
 
@@ -1293,7 +1294,10 @@ cannot allocate TLS data structures for initial thread");
 	  size_t s = (uintptr_t) &__stack_prot - p + sizeof (int);
 
 	  __mprotect ((void *) p, s, PROT_READ|PROT_WRITE);
-	  __stack_prot |= PROT_EXEC;
+	  if (__builtin_expect (__check_caller (RETURN_ADDRESS (0),
+						allow_ldso|allow_libc) == 0,
+				0))
+	    __stack_prot |= PROT_EXEC;
 	  __mprotect ((void *) p, s, PROT_READ);
 	}
       else
-- 
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