diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-16 09:18:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-11-16 09:18:46 +0100 |
| commit | 93c69b2d17372463ae33b79b3002c22a208945b3 (patch) | |
| tree | 328d30d717710d830633337ada90a65d65095eda /net/ipv6/syncookies.c | |
| parent | ef84928cff589c6b42e16b3ef7d2d95469128c80 (diff) | |
| parent | 09162bc32c880a791c6c0668ce0745cf7958f576 (diff) | |
Merge 5.10-rc4 into char-misc-next
We need the char/misc fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv6/syncookies.c')
| -rw-r--r-- | net/ipv6/syncookies.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/ipv6/syncookies.c b/net/ipv6/syncookies.c index e796a64be308..9b6cae1e49d9 100644 --- a/net/ipv6/syncookies.c +++ b/net/ipv6/syncookies.c @@ -136,7 +136,7 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb) __u32 cookie = ntohl(th->ack_seq) - 1; struct sock *ret = sk; struct request_sock *req; - int mss; + int full_space, mss; struct dst_entry *dst; __u8 rcv_wscale; u32 tsoff = 0; @@ -241,7 +241,13 @@ struct sock *cookie_v6_check(struct sock *sk, struct sk_buff *skb) } req->rsk_window_clamp = tp->window_clamp ? :dst_metric(dst, RTAX_WINDOW); - tcp_select_initial_window(sk, tcp_full_space(sk), req->mss, + /* limit the window selection if the user enforce a smaller rx buffer */ + full_space = tcp_full_space(sk); + if (sk->sk_userlocks & SOCK_RCVBUF_LOCK && + (req->rsk_window_clamp > full_space || req->rsk_window_clamp == 0)) + req->rsk_window_clamp = full_space; + + tcp_select_initial_window(sk, full_space, req->mss, &req->rsk_rcv_wnd, &req->rsk_window_clamp, ireq->wscale_ok, &rcv_wscale, dst_metric(dst, RTAX_INITRWND)); |