From 996f6e12cfb33ff6c3e39b4511bb3b8bc564b342 Mon Sep 17 00:00:00 2001 From: WANG Cong Date: Wed, 26 Jul 2017 15:22:07 -0700 Subject: [PATCH] team: use a larger struct for mac address IPv6 tunnels use sizeof(struct in6_addr) as dev->addr_len, but in many places especially bonding, we use struct sockaddr to copy and set mac addr, this could lead to stack out-of-bounds access. Fix it by using a larger address storage like bonding. Reported-by: Andrey Konovalov Cc: Jiri Pirko Signed-off-by: Cong Wang Signed-off-by: David S. Miller --- drivers/net/team/team.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/team/team.c b/drivers/net/team/team.c index 4645704..ae53e89 100644 --- a/drivers/net/team/team.c +++ b/drivers/net/team/team.c @@ -60,11 +60,11 @@ static struct team_port *team_port_get_rtnl(const struct net_device *dev) static int __set_port_dev_addr(struct net_device *port_dev, const unsigned char *dev_addr) { - struct sockaddr addr; + struct sockaddr_storage addr; - memcpy(addr.sa_data, dev_addr, port_dev->addr_len); - addr.sa_family = port_dev->type; - return dev_set_mac_address(port_dev, &addr); + memcpy(addr.__data, dev_addr, port_dev->addr_len); + addr.ss_family = port_dev->type; + return dev_set_mac_address(port_dev, (struct sockaddr *)&addr); } static int team_port_set_orig_dev_addr(struct team_port *port) -- 2.7.4