autofs4 - fix dentry leak in autofs4_expire_direct()

There is a missing dput() when returning from autofs4_expire_direct()
when we see that the dentry is already a pending mount.

Signed-off-by: Ian Kent <raven@themaw.net>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c
index c896dd6..c403abc 100644 (file)
--- a/fs/autofs4/expire.c
+++ b/fs/autofs4/expire.c
@@ -290,10 +290,8 @@ struct dentry *autofs4_expire_direct(struct super_block *sb,
        spin_lock(&sbi->fs_lock);
        ino = autofs4_dentry_ino(root);
        /* No point expiring a pending mount */
-       if (ino->flags & AUTOFS_INF_PENDING) {
-               spin_unlock(&sbi->fs_lock);
-               return NULL;
-       }
+       if (ino->flags & AUTOFS_INF_PENDING)
+               goto out;
        if (!autofs4_direct_busy(mnt, root, timeout, do_now)) {
                struct autofs_info *ino = autofs4_dentry_ino(root);
                ino->flags |= AUTOFS_INF_EXPIRING;
@@ -301,6 +299,7 @@ struct dentry *autofs4_expire_direct(struct super_block *sb,
                spin_unlock(&sbi->fs_lock);
                return root;
        }
+out:
        spin_unlock(&sbi->fs_lock);
        dput(root);