ceph: fix dangling pointer

Clear fi->last_name when it's freed.  The only caller is rewinddir() (or
equivalent lseek).

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index e0a2dc6fcafc..1e11ed716f85 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -414,6 +414,7 @@ static void reset_readdir(struct ceph_file_info *fi)
                 fi->last_readdir = NULL;
         }
         kfree(fi->last_name);
+        fi->last_name = NULL;
         fi->next_offset = 2;  /* compensate for . and .. */
         if (fi->dentry) {
                 dput(fi->dentry);