On Tue, Aug 09, 2011 at 09:41:33AM +0400, Pavel Shilovsky wrote:
> > ? ? ? ? ? ? ? ?mutex_unlock(&dir->i_mutex);
> > ? ? ? ? ? ? ? ?dput(dentry);
> > ? ? ? ? ? ? ? ?dentry = child;
> > + ? ? ? ? ? ? ? if (!dentry->d_inode) {
>
> dentry can be NULL here (returned from lookup_one_len) and it can
> cause a null pointer dereference.
Not NULL, ERR_PTR(...). IOW, we need to check IS_ERR(dentry) to protect
that check of dentry->d_inode.
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