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 50DF9C433ED for ; Mon, 12 Apr 2021 16:33:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2399B611AD for ; Mon, 12 Apr 2021 16:33:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243978AbhDLQd5 (ORCPT ); Mon, 12 Apr 2021 12:33:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:56028 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244659AbhDLQ1J (ORCPT ); Mon, 12 Apr 2021 12:27:09 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 4263E61383; Mon, 12 Apr 2021 16:25:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1618244708; bh=BEKUve7Q4K3KJGHHL+3o/XCjgyiAbJpb2NxXrdbqF+0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IbjNAA33ZROGXiiJie0h5GKW9o6AC1y0hSvHaVfr2vAdVj9CkJo+fOwqLZ3i+JY1v oNhmqeXobk9J8Yynf5a4ir56gLyW3E3yovGFOn7UFmjiSiaETZjKbVjWo4OBeSJ0N1 w3EQkdUGqa3ze26924lxOxUk7DI2xtDKyqt5LIIi9cV/rOfgK0uuncjE/GYmrIj8SJ sv8gqlp6J7ghJtwLPpKFbTgAMb25cRtcV3XmxlV6nmYVFWVD4rHLZGA3fXeMYt4P2z ngB4UccUiYbvz3EplcTlP8Y7g0qcz2MOnSTJyeV3AKRr6hHy5eBSRbMtIPAaHO9xgP KgP9+3tPKbZ8g== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Alexander Aring , syzbot+368672e0da240db53b5f@syzkaller.appspotmail.com, Stefan Schmidt , Sasha Levin , linux-wpan@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 04/39] net: ieee802154: fix nl802154 del llsec devkey Date: Mon, 12 Apr 2021 12:24:26 -0400 Message-Id: <20210412162502.314854-4-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: linux-kernel@vger.kernel.org From: Alexander Aring [ Upstream commit 27c746869e1a135dffc2f2a80715bb7aa00445b4 ] 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: Sasha Levin --- net/ieee802154/nl802154.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c index 43003108be95..c398f1ac74b8 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -1932,7 +1932,8 @@ static int nl802154_del_llsec_devkey(struct sk_buff *skb, struct genl_info *info struct ieee802154_llsec_device_key key; __le64 extended_addr; - if (nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack)) + if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] || + nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack)) return -EINVAL; if (!attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]) -- 2.30.2