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security: testing the wrong variable in create_by_name()

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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@gmail.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Dan Carpenter 2010-04-22 12:05:35 +02:00 committed by James Morris
parent e134d200d5
commit b338cc8207
1 changed files with 2 additions and 2 deletions
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4
security/inode.c
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@ -161,13 +161,13 @@ static int create_by_name(const char *name, mode_t mode,
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;