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From: James Morris on 22 Apr 2010 07:20
On Thu, 22 Apr 2010, Dan Carpenter wrote:

> 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>

Looks correct -- queued for Linus.


>
> diff --git a/security/inode.c b/security/inode.c
> index c3a7938..1c812e8 100644
> --- a/security/inode.c
> +++ b/security/inode.c
> @@ -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;
>

--
James Morris
<jmorris(a)namei.org>
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