Fix i_mutex vs. readdir handling in nfsd

[safe/jmp/linux-2.6] / fs / namei.c

diff --git a/fs/namei.c b/fs/namei.c
index b8433eb..78f253c 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1248,6 +1248,8 @@ struct dentry *lookup_one_len(const char *name, struct dentry *base, int len)
        int err;
        struct qstr this;
 
+       WARN_ON_ONCE(!mutex_is_locked(&base->d_inode->i_mutex));
+
        err = __lookup_one_len(name, &this, base, len);
        if (err)
                return ERR_PTR(err);