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 X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A578AC433ED for ; Mon, 12 Apr 2021 16:32:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7644561288 for ; Mon, 12 Apr 2021 16:32:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244288AbhDLQci (ORCPT ); Mon, 12 Apr 2021 12:32:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:35662 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245184AbhDLQ3z (ORCPT ); Mon, 12 Apr 2021 12:29:55 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 846CC6135C; Mon, 12 Apr 2021 16:25:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618244755; bh=nkH7xThCyOmnPCpcc/xlAl5WT+HcSRCGoCaTMMxeiEA=; h=From:To:Cc:Subject:Date:From; b=HmaMrQ/ohn/mnVLGUxQY+AcaP1Rg6S4+bmy+9+Fl342gUIyM3iHtQIKOMXaCmRyNs A41LSap4Wb+Vw0EiGrlXv3cesyVaHxJZe1y1kv6t49Gu/J/62Uew4Un+maBq/QY7Tq IFKN1FdinYxHaBBAJJwZjofqZOi5zfmoIH6aaLE9mIGJdLlJlz9y6VujZz43sUUX1Q //ST1LGqKbp956/nBRrd/WrTAUunZjrFNaDiqm83hZVNltdy8wAclyPO6NfzUoDCAv A54YgV7z8EHKR0DEQ7COH6X6ZEplvsszYn0eWLsqt4w48KAYxNsTYdyGL83fHyetbd nCnV3rUZ2EGfw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alexander Aring , syzbot+d4c07de0144f6f63be3a@syzkaller.appspotmail.com, Stefan Schmidt , Sasha Levin , linux-wpan@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 4.19 01/28] net: ieee802154: nl-mac: fix check on panid Date: Mon, 12 Apr 2021 12:25:26 -0400 Message-Id: <20210412162553.315227-1-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Alexander Aring [ Upstream commit 6f7f657f24405f426212c09260bf7fe8a52cef33 ] This patch fixes a null pointer derefence for panid handle by move the check for the netlink variable directly before accessing them. Reported-by: syzbot+d4c07de0144f6f63be3a@syzkaller.appspotmail.com Signed-off-by: Alexander Aring Link: https://lore.kernel.org/r/20210228151817.95700-4-aahringo@redhat.com Signed-off-by: Stefan Schmidt Signed-off-by: Sasha Levin --- net/ieee802154/nl-mac.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/net/ieee802154/nl-mac.c b/net/ieee802154/nl-mac.c index d3cbb3258718..c0930b9fe848 100644 --- a/net/ieee802154/nl-mac.c +++ b/net/ieee802154/nl-mac.c @@ -559,9 +559,7 @@ ieee802154_llsec_parse_key_id(struct genl_info *info, desc->mode = nla_get_u8(info->attrs[IEEE802154_ATTR_LLSEC_KEY_MODE]); if (desc->mode == IEEE802154_SCF_KEY_IMPLICIT) { - if (!info->attrs[IEEE802154_ATTR_PAN_ID] && - !(info->attrs[IEEE802154_ATTR_SHORT_ADDR] || - info->attrs[IEEE802154_ATTR_HW_ADDR])) + if (!info->attrs[IEEE802154_ATTR_PAN_ID]) return -EINVAL; desc->device_addr.pan_id = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_PAN_ID]); @@ -570,6 +568,9 @@ ieee802154_llsec_parse_key_id(struct genl_info *info, desc->device_addr.mode = IEEE802154_ADDR_SHORT; desc->device_addr.short_addr = nla_get_shortaddr(info->attrs[IEEE802154_ATTR_SHORT_ADDR]); } else { + if (!info->attrs[IEEE802154_ATTR_HW_ADDR]) + return -EINVAL; + desc->device_addr.mode = IEEE802154_ADDR_LONG; desc->device_addr.extended_addr = nla_get_hwaddr(info->attrs[IEEE802154_ATTR_HW_ADDR]); } -- 2.30.2