The eth_addr member is passed to ether_addr functions that require
2-byte alignment, therefore the member must be properly aligned
to avoid unaligned accesses.
The problem is in place since the initial merge of multicast to unicast:
commit 6db6f0eae6052b70885562e1733896647ec1d807 bridge: multicast to unicast
Fixes: 6db6f0eae605 ("bridge: multicast to unicast")
Cc: Roopa Prabhu <roopa@xxxxxxxxxxxxxxxxxxx>
Cc: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Jakub Kicinski <kuba@xxxxxxxxxx>
Cc: Felix Fietkau <nbd@xxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Martitz <t.martitz@xxxxxx>
---
net/bridge/br_private.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 7501be4eeba0..2130fe0194e6 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -217,8 +217,8 @@ struct net_bridge_port_group {
struct rcu_head rcu;
struct timer_list timer;
struct br_ip addr;
+ unsigned char eth_addr[ETH_ALEN] __aligned(2);
unsigned char flags;
- unsigned char eth_addr[ETH_ALEN];
};
struct net_bridge_mdb_entry {
--
2.27.0
