mptcp: drop unconditional pr_warn on bad opt

commit 3812ce895047afdb78dc750a236515416e0ccded upstream.

This is a left-over of early day. A malicious peer can flood
the kernel logs with useless messages, just drop it.

Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index a044dd4..91034a2 100644 (file)
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -127,7 +127,6 @@ static void mptcp_parse_option(const struct sk_buff *skb,
                        memcpy(mp_opt->hmac, ptr, MPTCPOPT_HMAC_LEN);
                        pr_debug("MP_JOIN hmac");
                } else {
-                       pr_warn("MP_JOIN bad option size");
                        mp_opt->mp_join = 0;
                }
                break;