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authorJiri Pirko <jiri@mellanox.com>2016-08-25 19:30:52 +0300
committerDavid S. Miller <davem@davemloft.net>2016-08-26 23:08:59 +0300
commitc15e07b02bf0450bc8e60f2cc51cb42daa371417 (patch)
tree8010de31c89d096b98d8f34535c49270f1d29097 /drivers/net/team
parentc234af5875ffeab39d5a2c4230a477a35987a484 (diff)
downloadlinux-c15e07b02bf0450bc8e60f2cc51cb42daa371417.tar.xz
team: loadbalance: push lacpdus to exact delivery
When team is in bridge and LACP is utilized, LACPDU packets are pushed to userspace using raw socket and there they are processed. However, since 8626c56c8279b, LACPDU skbs are dropped by bridge rx_handler so they never reach packet handlers in rx path. Fix this by explicity treat LACPDUs to be pushed to exact delivery in team rx_handler. Reported-by: Ido Schimmel <idosch@mellanox.com> Fixes: 8626c56c8279b ("bridge: fix potential use-after-free when hook returns QUEUE or STOLEN verdict") Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/team')
-rw-r--r--drivers/net/team/team_mode_loadbalance.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/team/team_mode_loadbalance.c b/drivers/net/team/team_mode_loadbalance.c
index cdb19b385d42..b228bea7931f 100644
--- a/drivers/net/team/team_mode_loadbalance.c
+++ b/drivers/net/team/team_mode_loadbalance.c
@@ -14,9 +14,23 @@
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
#include <linux/filter.h>
#include <linux/if_team.h>
+static rx_handler_result_t lb_receive(struct team *team, struct team_port *port,
+ struct sk_buff *skb)
+{
+ if (unlikely(skb->protocol == htons(ETH_P_SLOW))) {
+ /* LACPDU packets should go to exact delivery */
+ const unsigned char *dest = eth_hdr(skb)->h_dest;
+
+ if (is_link_local_ether_addr(dest) && dest[5] == 0x02)
+ return RX_HANDLER_EXACT;
+ }
+ return RX_HANDLER_ANOTHER;
+}
+
struct lb_priv;
typedef struct team_port *lb_select_tx_port_func_t(struct team *,
@@ -652,6 +666,7 @@ static const struct team_mode_ops lb_mode_ops = {
.port_enter = lb_port_enter,
.port_leave = lb_port_leave,
.port_disabled = lb_port_disabled,
+ .receive = lb_receive,
.transmit = lb_transmit,
};