6.12-stable review patch. If anyone has any objections, please let me know.
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From: Álvaro Fernández Rojas noltari@gmail.com
[ Upstream commit efdddc4484859082da6c7877ed144c8121c8ea55 ]
BRCM_LEG_PORT_ID was incorrectly used for pskb_may_pull length. The correct check is BRCM_LEG_TAG_LEN + VLAN_HLEN, or 10 bytes.
Fixes: 964dbf186eaa ("net: dsa: tag_brcm: add support for legacy tags") Signed-off-by: Álvaro Fernández Rojas noltari@gmail.com Reviewed-by: Florian Fainelli florian.fainelli@broadcom.com Link: https://patch.msgid.link/20250529124406.2513779-1-noltari@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/dsa/tag_brcm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c index 8c3c068728e51..fe75821623a4f 100644 --- a/net/dsa/tag_brcm.c +++ b/net/dsa/tag_brcm.c @@ -257,7 +257,7 @@ static struct sk_buff *brcm_leg_tag_rcv(struct sk_buff *skb, int source_port; u8 *brcm_tag;
- if (unlikely(!pskb_may_pull(skb, BRCM_LEG_PORT_ID))) + if (unlikely(!pskb_may_pull(skb, BRCM_LEG_TAG_LEN + VLAN_HLEN))) return NULL;
brcm_tag = dsa_etype_header_pos_rx(skb);