From 51486b900ee92856b977eacfc5bfbe6565028070 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 23 Oct 2014 13:26:21 -0400 Subject: fix inode leaks on d_splice_alias() failure exits d_splice_alias() callers expect it to either stash the inode reference into a new alias, or drop the inode reference. That makes it possible to just return d_splice_alias() result from ->lookup() instance, without any extra housekeeping required. Unfortunately, that should include the failure exits. If d_splice_alias() returns an error, it leaves the dentry it has been given negative and thus it *must* drop the inode reference. Easily fixed, but it goes way back and will need backporting. Cc: stable@vger.kernel.org Signed-off-by: Al Viro --- fs/dcache.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'fs/dcache.c') diff --git a/fs/dcache.c b/fs/dcache.c index d5a23fd0da90..3ffef7f4e5cd 100644 --- a/fs/dcache.c +++ b/fs/dcache.c @@ -2673,11 +2673,13 @@ struct dentry *d_splice_alias(struct inode *inode, struct dentry *dentry) if (!IS_ROOT(new)) { spin_unlock(&inode->i_lock); dput(new); + iput(inode); return ERR_PTR(-EIO); } if (d_ancestor(new, dentry)) { spin_unlock(&inode->i_lock); dput(new); + iput(inode); return ERR_PTR(-EIO); } write_seqlock(&rename_lock); -- cgit v1.2.3