From: Ulrich Drepper <drepper@redhat.com>
Date: Mon, 20 Sep 2004 15:15:23 +0000 (+0000)
Subject: (_dl_map_object_from_fd): Add caller check.
X-Git-Tag: upstream/2.30~17489
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=703ccc12453bbe0111b758637445386ed834b8ae;p=external%2Fglibc.git

(_dl_map_object_from_fd): Add caller check.
---

diff --git a/elf/dl-load.c b/elf/dl-load.c
index fad456f..e4f85a9 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