From: Andreas Gruenbacher <agruenba@redhat.com>
Date: Fri, 17 Jun 2016 12:22:15 +0000 (-0500)
Subject: gfs2: Initialize iopen glock holder for new inodes
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1e875f5a95a28b5286165db9fa832b0773657ddb;p=linux-beck.git

gfs2: Initialize iopen glock holder for new inodes

In gfs2_init_inode_once, initialize inode->i_iopen_gh.gh_gl to NULL:
otherwise, when gfs2_inode_lookup fails, the iopen glock holder can
remain unset and iget_failed can end up accessing random memory.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
---

diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index f99f8e94de3f..615f67581cc2 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -45,6 +45,7 @@ static void gfs2_init_inode_once(void *foo)
 	memset(&ip->i_res, 0, sizeof(ip->i_res));
 	RB_CLEAR_NODE(&ip->i_res.rs_node);
 	ip->i_hash_cache = NULL;
+	ip->i_iopen_gh.gh_gl = NULL;
 }
 
 static void gfs2_init_glock_once(void *foo)