From owner-svn-src-stable-11@freebsd.org Thu May 7 02:16:25 2020 Return-Path: Delivered-To: svn-src-stable-11@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 94C1D2E83CF; Thu, 7 May 2020 02:16:25 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49HcX93RMlz4bvj; Thu, 7 May 2020 02:16:25 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 7115C962B; Thu, 7 May 2020 02:16:25 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 0472GPn0087985; Thu, 7 May 2020 02:16:25 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 0472GPVN087984; Thu, 7 May 2020 02:16:25 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <202005070216.0472GPVN087984@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Thu, 7 May 2020 02:16:25 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r360746 - stable/11/sys/netinet X-SVN-Group: stable-11 X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: stable/11/sys/netinet X-SVN-Commit-Revision: 360746 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-11@freebsd.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: SVN commit messages for only the 11-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 May 2020 02:16:25 -0000 Author: tuexen Date: Thu May 7 02:16:25 2020 New Revision: 360746 URL: https://svnweb.freebsd.org/changeset/base/360746 Log: MFC r353303: Improve SCTP packet handling Validate length before use it, not vice versa. r353060 should have contained this... This fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18070 Modified: stable/11/sys/netinet/sctp_asconf.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet/sctp_asconf.c ============================================================================== --- stable/11/sys/netinet/sctp_asconf.c Thu May 7 02:13:28 2020 (r360745) +++ stable/11/sys/netinet/sctp_asconf.c Thu May 7 02:16:25 2020 (r360746) @@ -332,11 +332,11 @@ sctp_process_asconf_delete_ip(struct sockaddr *src, #endif aparam_length = ntohs(aph->ph.param_length); - ph = (struct sctp_paramhdr *)(aph + 1); - param_type = ntohs(ph->param_type); if (aparam_length < sizeof(struct sctp_asconf_paramhdr) + sizeof(struct sctp_paramhdr)) { return (NULL); } + ph = (struct sctp_paramhdr *)(aph + 1); + param_type = ntohs(ph->param_type); #if defined(INET) || defined(INET6) param_length = ntohs(ph->param_length); if (param_length + sizeof(struct sctp_asconf_paramhdr) != aparam_length) {