From: Mike Snitzer <snitzer@redhat.com>
Date: Thu, 22 Oct 2015 14:56:40 +0000 (-0400)
Subject: dm btree: fix leak of bufio-backed block in btree_split_beneath error path
X-Git-Tag: v3.2.73~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12d1c67b7b482bea0503fb9e42e9d257498b5c32;p=pandora-kernel.git

dm btree: fix leak of bufio-backed block in btree_split_beneath error path

commit 4dcb8b57df3593dcb20481d9d6cf79d1dc1534be upstream.

btree_split_beneath()'s error path had an outstanding FIXME that speaks
directly to the potential for _not_ cleaning up a previously allocated
bufio-backed block.

Fix this by releasing the previously allocated bufio block using
unlock_block().

Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <thornber@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
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