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authorJohn Fastabend <john.fastabend@gmail.com>2019-05-13 07:19:55 -0700
committerDaniel Borkmann <daniel@iogearbox.net>2019-05-14 01:31:43 +0200
commitcabede8b4f2b746232aa25730a0b752de1cb82ca (patch)
treee258b4fb9bfab58874ce7af66f37af4e50f3d949
parentc42253cc88206fd0e9868c8b2fd7f9e79f9e0e03 (diff)
bpf: sockmap fix msg->sg.size account on ingress skb
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@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
-rw-r--r--net/core/skmsg.c1
1 files changed, 1 insertions, 0 deletions
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;