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From: Greg KH on 10 May 2010 19:30
2.6.33-stable review patch. If anyone has any objections, please let us know.

------------------

From: Dan Carpenter <error27(a)gmail.com>

commit b338cc8207eae46640a8d534738fda7b5e48511d upstream.

There is a typo here. We should be testing "*dentry" instead of
"dentry". If "*dentry" is an ERR_PTR, it gets dereferenced in either
mkdir() or create() which would cause an OOPs.

Signed-off-by: Dan Carpenter <error27(a)gmail.com>
Signed-off-by: James Morris <jmorris(a)namei.org>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
security/inode.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/security/inode.c
+++ b/security/inode.c
@@ -161,13 +161,13 @@ static int create_by_name(const char *na

mutex_lock(&parent->d_inode->i_mutex);
*dentry = lookup_one_len(name, parent, strlen(name));
- if (!IS_ERR(dentry)) {
+ if (!IS_ERR(*dentry)) {
if ((mode & S_IFMT) == S_IFDIR)
error = mkdir(parent->d_inode, *dentry, mode);
else
error = create(parent->d_inode, *dentry, mode);
} else
- error = PTR_ERR(dentry);
+ error = PTR_ERR(*dentry);
mutex_unlock(&parent->d_inode->i_mutex);

return error;


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