From: Willem de Bruijn willemb@google.com
[ Upstream commit b85f628aa158a653c006e9c1405a117baef8c868 ]
CHECKSUM_COMPLETE signals that skb->csum stores the sum over the entire packet. It does not imply that an embedded l4 checksum field has been validated.
Fixes: 682f048bd494 ("af_packet: pass checksum validation status to the user") Signed-off-by: Willem de Bruijn willemb@google.com Link: https://lore.kernel.org/r/20221128161812.640098-1-willemdebruijn.kernel@gmai... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/packet/af_packet.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index b70b06e312bd..eaa030e2ad55 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -2243,8 +2243,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, if (skb->ip_summed == CHECKSUM_PARTIAL) status |= TP_STATUS_CSUMNOTREADY; else if (skb->pkt_type != PACKET_OUTGOING && - (skb->ip_summed == CHECKSUM_COMPLETE || - skb_csum_unnecessary(skb))) + skb_csum_unnecessary(skb)) status |= TP_STATUS_CSUM_VALID;
if (snaplen > res) @@ -3480,8 +3479,7 @@ static int packet_recvmsg(struct socket *sock, struct msghdr *msg, size_t len, if (skb->ip_summed == CHECKSUM_PARTIAL) aux.tp_status |= TP_STATUS_CSUMNOTREADY; else if (skb->pkt_type != PACKET_OUTGOING && - (skb->ip_summed == CHECKSUM_COMPLETE || - skb_csum_unnecessary(skb))) + skb_csum_unnecessary(skb)) aux.tp_status |= TP_STATUS_CSUM_VALID;
aux.tp_len = origlen;