From: John Fastabend <john.fastabend@xxxxxxxxx>
[ Upstream commit cabede8b4f2b746232aa25730a0b752de1cb82ca ]
When converting a skb to msg->sg we forget to set the size after the
latest ktls/tls code conversion. This patch can be reached by doing
a redir into ingress path from BPF skb sock recv hook. Then trying to
read the size fails.
Fix this by setting the size.
Fixes: 604326b41a6fb ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: John Fastabend <john.fastabend@xxxxxxxxx>
Signed-off-by: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/core/skmsg.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 49d1efa329d7..93bffaad2135 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -411,6 +411,7 @@ static int sk_psock_skb_ingress(struct sk_psock *psock, struct sk_buff *skb)
sk_mem_charge(sk, skb->len);
copied = skb->len;
msg->sg.start = 0;
+ msg->sg.size = copied;
msg->sg.end = num_sge == MAX_MSG_FRAGS ? 0 : num_sge;
msg->skb = skb;
--
2.20.1
