when packet is enqueued with nfqueue and GSO is enabled, checksum
calculation has to take into account the protocol, as SCTP uses a
32 bits CRC checksum.
Signed-off-by: Antonio Ojea <aojea@xxxxxxxxxx>
---
V1 -> V2: add a helper function to process the checksum
V2 -> V3: use tabs instead of whitespaces
net/netfilter/nfnetlink_queue.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index 00f4bd21c59b..13802907ddb8 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -538,6 +538,14 @@ static int nfqnl_put_bridge(struct nf_queue_entry *entry, struct sk_buff *skb)
return -1;
}
+static int nf_queue_checksum_help(struct sk_buff *entskb)
+{
+ if (skb_csum_is_sctp(entskb))
+ return skb_crc32c_csum_help(entskb);
+
+ return skb_checksum_help(entskb);
+}
+
static struct sk_buff *
nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
struct nf_queue_entry *entry,
@@ -600,7 +608,7 @@ nfqnl_build_packet_message(struct net *net, struct nfqnl_instance *queue,
case NFQNL_COPY_PACKET:
if (!(queue->flags & NFQA_CFG_F_GSO) &&
entskb->ip_summed == CHECKSUM_PARTIAL &&
- skb_checksum_help(entskb))
+ nf_queue_checksum_help(entskb))
return NULL;
data_len = READ_ONCE(queue->copy_range);
--
2.45.0.118.g7fe29c98d7-goog
