From 8931221411f9ff950de8fd686dc5ab881394cb9a Mon Sep 17 00:00:00 2001 From: Ian Kent Date: Tue, 18 Jan 2011 12:06:10 +0800 Subject: [PATCH] vfs - fix dentry ref count in do_lookup() There is a ref count problem in fs/namei.c:do_lookup(). When walking in ref-walk mode, if follow_managed() returns a fail we need to drop dentry and possibly vfsmount. Clean up properly, as we do in the other caller of follow_managed(). Signed-off-by: Ian Kent Signed-off-by: Al Viro --- fs/namei.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/namei.c b/fs/namei.c index b753192d8c3f..7d77f24d32a9 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1272,8 +1272,10 @@ static int do_lookup(struct nameidata *nd, struct qstr *name, path->mnt = mnt; path->dentry = dentry; err = follow_managed(path, nd->flags); - if (unlikely(err < 0)) + if (unlikely(err < 0)) { + path_put_conditional(path, nd); return err; + } *inode = path->dentry->d_inode; return 0;