From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bl2nam02on0115.outbound.protection.outlook.com ([104.47.38.115]:21822 "EHLO NAM02-BL2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753009AbeBCSD5 (ORCPT ); Sat, 3 Feb 2018 13:03:57 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Johannes Berg , Sasha Levin Subject: [PATCH AUTOSEL for 4.14 088/110] mac80211: mesh: drop frames appearing to be from us Date: Sat, 3 Feb 2018 18:01:25 +0000 Message-ID: <20180203180015.29073-88-alexander.levin@microsoft.com> References: <20180203180015.29073-1-alexander.levin@microsoft.com> In-Reply-To: <20180203180015.29073-1-alexander.levin@microsoft.com> Content-Language: en-US Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org List-ID: From: Johannes Berg [ Upstream commit 736a80bbfda709fb3631f5f62056f250a38e5804 ] If there are multiple mesh stations with the same MAC address, they will both get confused and start throwing warnings. Obviously in this case nothing can actually work anyway, so just drop frames that look like they're from ourselves early on. Reported-by: Gui Iribarren Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/rx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index 70e9d2ca8bbe..4daafb07602f 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -3632,6 +3632,8 @@ static bool ieee80211_accept_frame(struct ieee80211_r= x_data *rx) } return true; case NL80211_IFTYPE_MESH_POINT: + if (ether_addr_equal(sdata->vif.addr, hdr->addr2)) + return false; if (multicast) return true; return ether_addr_equal(sdata->vif.addr, hdr->addr1); --=20 2.11.0