From: Paolo Abeni <pabeni@redhat.com>
Date: Tue, 25 May 2021 21:23:11 +0000 (-0700)
Subject: mptcp: drop unconditional pr_warn on bad opt
X-Git-Tag: v5.13-rc4~29^2~2^2~2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=3812ce895047afdb78dc750a236515416e0ccded;p=linux-platform-drivers-x86.git

mptcp: drop unconditional pr_warn on bad opt

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>
---

diff --git a/net/mptcp/options.c b/net/mptcp/options.c
index 99fc21406168..71c535f4e1ef 100644
--- a/net/mptcp/options.c
+++ b/net/mptcp/options.c
@@ -130,7 +130,6 @@ 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;