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=-16.0 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, URIBL_BLOCKED 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 24D05C433E6 for ; Sun, 21 Feb 2021 17:45:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E196E64EE9 for ; Sun, 21 Feb 2021 17:45:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230088AbhBURpF (ORCPT ); Sun, 21 Feb 2021 12:45:05 -0500 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:50957 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230036AbhBURpD (ORCPT ); Sun, 21 Feb 2021 12:45:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1613929417; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=veEkBduKmRsVQSCI1fPx3giWU2w1iYFYp57+YGlkdNg=; b=bQdwpE6ATxhpMj81fq6NTEMRNsW8UhxKEq59mKq1wh7N/z1ARa+fz1ygk+KDmfCJLtCvFT LpHQy+jcTgFeDoRYe+CftqNGH8bUDCivp2nkY8ER53ItkEWwssW1PUaVRkk6CZNeE1Rl2Z iNsVqbk1HLKt+1ELYFnUApmKCTwPyig= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-547-8tz9E9PcOk-MA-rHgGBbnA-1; Sun, 21 Feb 2021 12:43:35 -0500 X-MC-Unique: 8tz9E9PcOk-MA-rHgGBbnA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 9AE446EE20; Sun, 21 Feb 2021 17:43:33 +0000 (UTC) Received: from carbon.redhat.com (ovpn-112-235.rdu2.redhat.com [10.10.112.235]) by smtp.corp.redhat.com (Postfix) with ESMTP id 31C311346F; Sun, 21 Feb 2021 17:43:33 +0000 (UTC) From: Alexander Aring To: stefan@datenfreihafen.org Cc: linux-wpan@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH wpan 2/4] net: ieee802154: fix nl802154 del llsec dev Date: Sun, 21 Feb 2021 12:43:19 -0500 Message-Id: <20210221174321.14210-2-aahringo@redhat.com> In-Reply-To: <20210221174321.14210-1-aahringo@redhat.com> References: <20210221174321.14210-1-aahringo@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Precedence: bulk List-ID: X-Mailing-List: linux-wpan@vger.kernel.org This patch fixes a nullpointer dereference if NL802154_ATTR_SEC_DEVICE is not set by the user. If this is the case nl802154 will return -EINVAL. Reported-by: syzbot+d946223c2e751d136c94@syzkaller.appspotmail.com Signed-off-by: Alexander Aring --- 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 2f0a138bd5eb..063b12cba71f 100644 --- a/net/ieee802154/nl802154.c +++ b/net/ieee802154/nl802154.c @@ -1758,7 +1758,8 @@ static int nl802154_del_llsec_dev(struct sk_buff *skb, struct genl_info *info) struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1]; __le64 extended_addr; - if (nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVICE], nl802154_dev_policy, info->extack)) + if (!info->attrs[NL802154_ATTR_SEC_DEVICE] || + nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVICE], nl802154_dev_policy, info->extack)) return -EINVAL; if (!attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]) -- 2.26.2