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 516B7C43460 for ; Mon, 12 Apr 2021 16:30:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 31D906128E for ; Mon, 12 Apr 2021 16:30:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244004AbhDLQaL (ORCPT ); Mon, 12 Apr 2021 12:30:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:57190 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243743AbhDLQ1N (ORCPT ); Mon, 12 Apr 2021 12:27:13 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A486D61366; Mon, 12 Apr 2021 16:25:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618244709; bh=AW0bp1piLj4es0BhKJCmMFtIk8VNLiEF3VgcSgo9LV4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GbHR9ujYFF/2RUDhSnSiqzIYpnm4QdI1rAjILF3Z2t4K5fjWqXzq/Hn7rk3N2LXEy P/+3VN2y48GKdNj4XcIvhwDwknXnyPvh3+WeD14q+fYPve0r5PY4tWt+AKmKL6M7/D 24bSQSN/4iJsPb8jcrofCPBgDVdUIDX/B7zdVGcaoxGjZoakqIq7I0k0We8xvlwfDD OBqTVXpTdB+7pp/9LlL82SwPj6luA8v12Nc3Pe8IPgCsTHS0AVw7wXHjNqtOhIYxb0 pIUKzHM5UkpSweYlUdk1opFKDL5lANl4d1WNAXX85Egt13il1MkwwL6F+dcYgxOoIW tjbjeS3z8lR6A== 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 5.4 05/39] net: ieee802154: nl-mac: fix check on panid Date: Mon, 12 Apr 2021 12:24:27 -0400 Message-Id: <20210412162502.314854-5-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210412162502.314854-1-sashal@kernel.org> References: <20210412162502.314854-1-sashal@kernel.org> 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 6d091e419d3e..d19c40c684e8 100644 --- a/net/ieee802154/nl-mac.c +++ b/net/ieee802154/nl-mac.c @@ -551,9 +551,7 @@ 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]); @@ -562,6 +560,9 @@ 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