From patchwork Thu Apr 15 14:47:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 422436 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, URIBL_BLOCKED, 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 1767EC43460 for ; Thu, 15 Apr 2021 14:50:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E93EC613CD for ; Thu, 15 Apr 2021 14:50:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233887AbhDOOuk (ORCPT ); Thu, 15 Apr 2021 10:50:40 -0400 Received: from mail.kernel.org ([198.145.29.99]:37724 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233788AbhDOOuS (ORCPT ); Thu, 15 Apr 2021 10:50:18 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 941146137D; Thu, 15 Apr 2021 14:49:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618498195; bh=5OkA6JiwflRrDvlnY8MM9WRQeCcCTJQsr90Sya2fHKw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ujYWL3iVb+BD1jcfYL/wlPZrH6ws0VmVtUarMslPYuRd8NlW5NLg8G83k/bMXogJC bgbAxtXr4b4HUzmGvuRKLrYQ2WHOgac104SNnzz3BqduBn+s9RHEqN3a7LJszuvQ28 4WFNLhB/CoFLmX0bS4A+8PgSPKWW92fg62htXP8M= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+ac5c11d2959a8b3c4806@syzkaller.appspotmail.com, Alexander Aring , Stefan Schmidt Subject: [PATCH 4.4 28/38] net: ieee802154: fix nl802154 del llsec key Date: Thu, 15 Apr 2021 16:47:22 +0200 Message-Id: <20210415144414.251777565@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210415144413.352638802@linuxfoundation.org> References: <20210415144413.352638802@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alexander Aring commit 37feaaf5ceb2245e474369312bb7b922ce7bce69 upstream. This patch fixes a nullpointer dereference if NL802154_ATTR_SEC_KEY is not set by the user. If this is the case nl802154 will return -EINVAL. Reported-by: syzbot+ac5c11d2959a8b3c4806@syzkaller.appspotmail.com Signed-off-by: Alexander Aring Link: https://lore.kernel.org/r/20210221174321.14210-1-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 @@ -1577,7 +1577,8 @@ static int nl802154_del_llsec_key(struct struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1]; struct ieee802154_llsec_key_id id; - if (nla_parse_nested(attrs, NL802154_KEY_ATTR_MAX, + if (!info->attrs[NL802154_ATTR_SEC_KEY] || + nla_parse_nested(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy)) return -EINVAL;