[PATCH net-next] bridge: mrp: fix MRP_Test option TLV length
From: David Corvaglia <hidden>
Date: 2026-07-24 05:12:45
Also in:
bridge, lkml
Subsystem:
ethernet bridge, networking [general], the rest · Maintainers:
Nikolay Aleksandrov, Ido Schimmel, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
oui is a pointer, so sizeof(oui) is the pointer size. The MRA Option TLV thus advertises a wrong length (15 vs 10 on x86_64), causing misparsing of the frame on peers. Fix is to replace with sizeof(*oui). Signed-off-by: David Corvaglia <redacted> --- net/bridge/br_mrp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c
index 3f7126a7d720..179d2470b724 100644
--- a/net/bridge/br_mrp.c
+++ b/net/bridge/br_mrp.c@@ -215,7 +215,7 @@ static struct sk_buff *br_mrp_alloc_test_skb(struct br_mrp *mrp, struct br_mrp_oui_hdr *oui = NULL; u8 length; - length = sizeof(*sub_opt) + sizeof(*sub_tlv) + sizeof(oui) + + length = sizeof(*sub_opt) + sizeof(*sub_tlv) + sizeof(*oui) + MRP_OPT_PADDING; br_mrp_skb_tlv(skb, BR_MRP_TLV_HEADER_OPTION, length);
--
2.55.0