From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:47566 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728831AbeIRE13 (ORCPT ); Tue, 18 Sep 2018 00:27:29 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jouni Malinen , Johannes Berg , Amit Pundir Subject: [PATCH 4.9 12/70] nl80211: fix null-ptr dereference on invalid mesh configuration Date: Tue, 18 Sep 2018 00:41:45 +0200 Message-Id: <20180917211650.245033837@linuxfoundation.org> In-Reply-To: <20180917211649.099135838@linuxfoundation.org> References: <20180917211649.099135838@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Johannes Berg commit 265698d7e6132a2d41471135534f4f36ad15b09c upstream. If TX rates are specified during mesh join, the channel must also be specified. Check the channel pointer to avoid a null pointer dereference if it isn't. Reported-by: Jouni Malinen Fixes: 8564e38206de ("cfg80211: add checks for beacon rate, extend to mesh") Signed-off-by: Johannes Berg Signed-off-by: Amit Pundir Signed-off-by: Greg Kroah-Hartman --- net/wireless/nl80211.c | 3 +++ 1 file changed, 3 insertions(+) --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -9481,6 +9481,9 @@ static int nl80211_join_mesh(struct sk_b if (err) return err; + if (!setup.chandef.chan) + return -EINVAL; + err = validate_beacon_tx_rate(rdev, setup.chandef.chan->band, &setup.beacon_rate); if (err)