From 492c8b332e3af279ffadf49b85967d5e43810923 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 23 May 2007 13:57:53 -0700
Subject: uselib: add missing MNT_NOEXEC check

We don't allow loading ELF shared library from noexec points so the
same should apply to sys_uselib aswell.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Ulrich Drepper <drepper@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/exec.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'fs')

diff --git a/fs/exec.c b/fs/exec.c
index 0b685888ff6..f20561ff452 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -134,6 +134,9 @@ asmlinkage long sys_uselib(const char __user * library)
 	if (error)
 		goto out;
 
+	error = -EACCES;
+	if (nd.mnt->mnt_flags & MNT_NOEXEC)
+		goto exit;
 	error = -EINVAL;
 	if (!S_ISREG(nd.dentry->d_inode->i_mode))
 		goto exit;
-- 
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