From patchwork Fri Jun 24 14:39:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mauro Matteo Cascella X-Patchwork-Id: 12894728 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id ACBB9C433EF for ; Fri, 24 Jun 2022 14:49:42 +0000 (UTC) Received: from localhost ([::1]:43742 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o4kcv-0008PK-7q for qemu-devel@archiver.kernel.org; Fri, 24 Jun 2022 10:49:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51482) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4kUB-0002hq-S7 for qemu-devel@nongnu.org; Fri, 24 Jun 2022 10:40:40 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:20440) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o4kU8-0006Eu-Re for qemu-devel@nongnu.org; Fri, 24 Jun 2022 10:40:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1656081636; 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; bh=n/Ld4MJ8F58aU4WR8h84iq6VwsNtL3FBRQCaOyozcsY=; b=XHqOELnvIlpgFNuEyh12/KZsJ8MK84WZQaILp/jhutdqoi9BpWC6ZKVhKpvbqpTMPvH+bT NGSXbsuafZr4rXm+Rc9daAx+8fM2XofMCG2Ni6cHETvukPOH7n6q3kANw/Ae8nFG7wk+vH PTVFl5TchaLYc5D3e6G7Q7V/3udF/Xs= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-447-POzoTNMxNH2CjA4IOKVDTQ-1; Fri, 24 Jun 2022 10:40:33 -0400 X-MC-Unique: POzoTNMxNH2CjA4IOKVDTQ-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id AD3E01C05143; Fri, 24 Jun 2022 14:40:32 +0000 (UTC) Received: from f35-work.redhat.com (unknown [10.39.193.235]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 5FA45492C3B; Fri, 24 Jun 2022 14:40:31 +0000 (UTC) From: Mauro Matteo Cascella To: qemu-devel@nongnu.org Cc: mcascell@redhat.com, jiri@resnulli.us, jasowang@redhat.com, arayz_w@icloud.com Subject: [PATCH] hw/net/rocker: avoid NULL pointer dereference in of_dpa_cmd_add_l2_flood Date: Fri, 24 Jun 2022 16:39:12 +0200 Message-Id: <20220624143912.1234427-1-mcascell@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.9 Received-SPF: pass client-ip=170.10.129.124; envelope-from=mcascell@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" rocker_tlv_parse_nested could return early because of no group ids in the group_tlvs. In such case tlvs is NULL; tlvs[i + 1] in the next for-loop will deref the NULL pointer. Signed-off-by: Mauro Matteo Cascella Reported-by: --- hw/net/rocker/rocker_of_dpa.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/hw/net/rocker/rocker_of_dpa.c b/hw/net/rocker/rocker_of_dpa.c index b3b8c5bb6d..1611b79227 100644 --- a/hw/net/rocker/rocker_of_dpa.c +++ b/hw/net/rocker/rocker_of_dpa.c @@ -2039,6 +2039,11 @@ static int of_dpa_cmd_add_l2_flood(OfDpa *of_dpa, OfDpaGroup *group, rocker_tlv_parse_nested(tlvs, group->l2_flood.group_count, group_tlvs[ROCKER_TLV_OF_DPA_GROUP_IDS]); + if (!tlvs) { + err = -ROCKER_EINVAL; + goto err_out; + } + for (i = 0; i < group->l2_flood.group_count; i++) { group->l2_flood.group_ids[i] = rocker_tlv_get_le32(tlvs[i + 1]); }