From: Jeremy Kerr Date: Fri, 29 Aug 2025 07:40:23 +0000 (+0800) Subject: net: mctp: usb: initialise mac header in RX path X-Git-Tag: v6.16.6~121 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d6c3e9bfe7350f4fe32c90148e9a0071aa215863;p=thirdparty%2Fkernel%2Fstable.git net: mctp: usb: initialise mac header in RX path [ Upstream commit e27e34bc99413a29cafae02ad572ea3c9beba2ce ] We're not currently setting skb->mac_header on ingress, and the netdev core rx path expects it. Without it, we'll hit a warning on DEBUG_NETDEV from commit 1e4033b53db4 ("net: skb_reset_mac_len() must check if mac_header was set") Initialise the mac_header to refer to the USB transport header. Fixes: 0791c0327a6e ("net: mctp: Add MCTP USB transport driver") Signed-off-by: Jeremy Kerr Link: https://patch.msgid.link/20250829-mctp-usb-mac-header-v1-1-338ad725e183@codeconstruct.com.au Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- diff --git a/drivers/net/mctp/mctp-usb.c b/drivers/net/mctp/mctp-usb.c index 775a386d0aca1..36ccc53b17975 100644 --- a/drivers/net/mctp/mctp-usb.c +++ b/drivers/net/mctp/mctp-usb.c @@ -183,6 +183,7 @@ static void mctp_usb_in_complete(struct urb *urb) struct mctp_usb_hdr *hdr; u8 pkt_len; /* length of MCTP packet, no USB header */ + skb_reset_mac_header(skb); hdr = skb_pull_data(skb, sizeof(*hdr)); if (!hdr) break;