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=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham 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 CC080C433ED for ; Mon, 12 Apr 2021 08:45:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A0EC61221 for ; Mon, 12 Apr 2021 08:45:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237770AbhDLIpQ (ORCPT ); Mon, 12 Apr 2021 04:45:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:36662 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229676AbhDLIpA (ORCPT ); Mon, 12 Apr 2021 04:45:00 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1C7EA60241; Mon, 12 Apr 2021 08:44:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618217082; bh=X1kcx40bGh+D7ygjon3boNqFWqh7TZUG20V0nr5TVkQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IAhzZPTErEOZu3V2x5qZbwz8CZivbEJjBHSjV8NZJ/Iur3ItMXpKWxqX5dKEVIHjB Us9b86FijNhSRIXNj9M0iA+QVKPji/BZO5atUyJwjLGIHSogDn+gre1Awla7YTQ5RK 4NdEMHJjf2LsR5zmiMdxK6T32HrJH8HgQKvy0ZqY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+368672e0da240db53b5f@syzkaller.appspotmail.com, Alexander Aring , Stefan Schmidt Subject: [PATCH 4.19 62/66] net: ieee802154: fix nl802154 del llsec devkey Date: Mon, 12 Apr 2021 10:41:08 +0200 Message-Id: <20210412084000.129439698@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210412083958.129944265@linuxfoundation.org> References: <20210412083958.129944265@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: stable@vger.kernel.org From: Alexander Aring commit 27c746869e1a135dffc2f2a80715bb7aa00445b4 upstream. This patch fixes a nullpointer dereference if NL802154_ATTR_SEC_DEVKEY is not set by the user. If this is the case nl802154 will return -EINVAL. Reported-by: syzbot+368672e0da240db53b5f@syzkaller.appspotmail.com Signed-off-by: Alexander Aring Link: https://lore.kernel.org/r/20210221174321.14210-4-aahringo@redhat.com Signed-off-by: Stefan Schmidt Signed-off-by: Greg Kroah-Hartman --- net/ieee802154/nl802154.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -1943,7 +1943,8 @@ static int nl802154_del_llsec_devkey(str struct ieee802154_llsec_device_key key; __le64 extended_addr; - if (nla_parse_nested(attrs, NL802154_DEVKEY_ATTR_MAX, + if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] || + nla_parse_nested(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack)) return -EINVAL;