[Bridge] [patch] bridge: make buffer larger in br_setlink()

Dan Carpenter dan.carpenter at oracle.com
Fri Dec 7 06:18:54 UTC 2012

__IFLA_BRPORT_MAX is one larger than IFLA_BRPORT_MAX.  We pass
IFLA_BRPORT_MAX to nla_parse_nested() so we need IFLA_BRPORT_MAX + 1
elements.  Also Smatch complains that we read past the end of the array
when in br_set_port_flag() when it's called with IFLA_BRPORT_FAST_LEAVE.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>
Only needed in linux-next.

diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 850b7d1..cfc5cfe 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -239,7 +239,7 @@ int br_setlink(struct net_device *dev, struct nlmsghdr *nlh)
 	struct ifinfomsg *ifm;
 	struct nlattr *protinfo;
 	struct net_bridge_port *p;
-	struct nlattr *tb[IFLA_BRPORT_MAX];
+	struct nlattr *tb[__IFLA_BRPORT_MAX];
 	int err;
 	ifm = nlmsg_data(nlh);

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