From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 23 Oct 2014 17:26:21 +0000 (-0400)
Subject: fix inode leaks on d_splice_alias() failure exits
X-Git-Tag: fixes-against-v3.18-rc2~5^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=51486b900ee92856b977eacfc5bfbe6565028070;p=pandora-kernel.git

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 <viro@zeniv.linux.org.uk>
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