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authorChristoph Hellwig <hch@lst.de>2007-05-23 13:57:53 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-23 20:14:13 -0700
commit492c8b332e3af279ffadf49b85967d5e43810923 (patch)
tree401977e562937b80385cbace842aae01a8dd2ad2 /fs/exec.c
parent5a1b63914815e4223ceb3d079286e18f9ee92b4b (diff)
downloadop-kernel-dev-492c8b332e3af279ffadf49b85967d5e43810923.zip
op-kernel-dev-492c8b332e3af279ffadf49b85967d5e43810923.tar.gz
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>
Diffstat (limited to 'fs/exec.c')
-rw-r--r--fs/exec.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/exec.c b/fs/exec.c
index 0b68588..f20561f 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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