From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67F8CC433EF for ; Thu, 14 Oct 2021 14:56:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4785D611AE for ; Thu, 14 Oct 2021 14:56:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231872AbhJNO6y (ORCPT ); Thu, 14 Oct 2021 10:58:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:43006 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232202AbhJNO6S (ORCPT ); Thu, 14 Oct 2021 10:58:18 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id DC21C61181; Thu, 14 Oct 2021 14:56:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1634223373; bh=w3OJtOJwclvrx5CNC2uLUqQBnmUtAI0KcB1fjYtYzxk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oPPL4+r1pBw94E9u8hR+jh8IL5iLwqlMgz7sKpmHaV0Ojynxz8YDhEKVE1yaFRqKB aieKLcSHM1HeOXsg0sDszQxE5wqfhMnTVsHLRzQQJVtIkCXPeSYD8Qi3DUrdsf+OTA udYYsO9bOYjGxR4cS3jUizLV5ijMxMwRvtdQMW4w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, YueHaibing , Johannes Berg , Sasha Levin Subject: [PATCH 4.9 22/25] mac80211: Drop frames from invalid MAC address in ad-hoc mode Date: Thu, 14 Oct 2021 16:53:53 +0200 Message-Id: <20211014145208.289512923@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211014145207.575041491@linuxfoundation.org> References: <20211014145207.575041491@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: YueHaibing [ Upstream commit a6555f844549cd190eb060daef595f94d3de1582 ] WARNING: CPU: 1 PID: 9 at net/mac80211/sta_info.c:554 sta_info_insert_rcu+0x121/0x12a0 Modules linked in: CPU: 1 PID: 9 Comm: kworker/u8:1 Not tainted 5.14.0-rc7+ #253 Workqueue: phy3 ieee80211_iface_work RIP: 0010:sta_info_insert_rcu+0x121/0x12a0 ... Call Trace: ieee80211_ibss_finish_sta+0xbc/0x170 ieee80211_ibss_work+0x13f/0x7d0 ieee80211_iface_work+0x37a/0x500 process_one_work+0x357/0x850 worker_thread+0x41/0x4d0 If an Ad-Hoc node receives packets with invalid source MAC address, it hits a WARN_ON in sta_info_insert_check(), this can spam the log. Signed-off-by: YueHaibing Link: https://lore.kernel.org/r/20210827144230.39944-1-yuehaibing@huawei.com Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/rx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index b40e71a5d795..3dc370ad23bf 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -3692,7 +3692,8 @@ static bool ieee80211_accept_frame(struct ieee80211_rx_data *rx) if (!bssid) return false; if (ether_addr_equal(sdata->vif.addr, hdr->addr2) || - ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2)) + ether_addr_equal(sdata->u.ibss.bssid, hdr->addr2) || + !is_valid_ether_addr(hdr->addr2)) return false; if (ieee80211_is_beacon(hdr->frame_control)) return true; -- 2.33.0