linux-kernel - [PATCH 5/5] GFS2: Fix crash during ACL deletion in acl max entry check in gfs2_set

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Message-Id: <1423564584-12488-6-git-send-email-swhiteho@redhat.com>
Date:	Tue, 10 Feb 2015 10:36:24 +0000
From:	Steven Whitehouse <swhiteho@...hat.com>
To:	linux-kernel@...r.kernel.org, cluster-devel@...hat.com
Cc:	Andrew Elble <aweits@....edu>,
	Steven Whitehouse <swhiteho@...hat.com>
Subject: [PATCH 5/5] GFS2: Fix crash during ACL deletion in acl max entry check in gfs2_set_acl()

From: Andrew Elble <aweits@....edu>

Fixes: e01580bf9e ("gfs2: use generic posix ACL infrastructure")
Reported-by: Eric Meddaugh <etmsys@....edu>
Tested-by: Eric Meddaugh <etmsys@....edu>
Signed-off-by: Andrew Elble <aweits@....edu>
Signed-off-by: Steven Whitehouse <swhiteho@...hat.com>

diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index 3088e2a..7b31430 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -73,7 +73,7 @@ int gfs2_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 
 	BUG_ON(name == NULL);
 
-	if (acl->a_count > GFS2_ACL_MAX_ENTRIES(GFS2_SB(inode)))
+	if (acl && acl->a_count > GFS2_ACL_MAX_ENTRIES(GFS2_SB(inode)))
 		return -E2BIG;
 
 	if (type == ACL_TYPE_ACCESS) {
-- 
1.8.3.1

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