From owner-svn-src-all@freebsd.org Mon Sep 30 04:54:03 2019 Return-Path: Delivered-To: svn-src-all@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 38E1AFB45D; Mon, 30 Sep 2019 04:54:03 +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 46hVRb0dBgz4Nfs; Mon, 30 Sep 2019 04:54:03 +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 EDE9B2551B; Mon, 30 Sep 2019 04:54:02 +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 x8U4s2Ec019210; Mon, 30 Sep 2019 04:54:02 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x8U4s2Mc019209; Mon, 30 Sep 2019 04:54:02 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <201909300454.x8U4s2Mc019209@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Mon, 30 Sep 2019 04:54:02 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-releng@freebsd.org Subject: svn commit: r352886 - releng/12.1/sys/netinet X-SVN-Group: releng X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: releng/12.1/sys/netinet X-SVN-Commit-Revision: 352886 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Sep 2019 04:54:03 -0000 Author: tuexen Date: Mon Sep 30 04:54:02 2019 New Revision: 352886 URL: https://svnweb.freebsd.org/changeset/base/352886 Log: MFS r352508: Don't write to memory outside of the allocated array for SACK blocks. PR: 240837 Approved by: re (delphij@) Obtained from: rrs@ Sponsored by: Netflix, Inc. Modified: releng/12.1/sys/netinet/tcp_sack.c Directory Properties: releng/12.1/ (props changed) Modified: releng/12.1/sys/netinet/tcp_sack.c ============================================================================== --- releng/12.1/sys/netinet/tcp_sack.c Mon Sep 30 03:35:48 2019 (r352885) +++ releng/12.1/sys/netinet/tcp_sack.c Mon Sep 30 04:54:02 2019 (r352886) @@ -235,7 +235,7 @@ tcp_update_dsack_list(struct tcpcb *tp, tcp_seq rcv_st saved_blks[n].start = mid_blk.start; saved_blks[n++].end = mid_blk.end; } - for (j = 0; (j < tp->rcv_numsacks) && (j < MAX_SACK_BLKS-1); j++) { + for (j = 0; (j < tp->rcv_numsacks) && (n < MAX_SACK_BLKS); j++) { if (((SEQ_LT(tp->sackblks[j].end, mid_blk.start) || SEQ_GT(tp->sackblks[j].start, mid_blk.end)) && (SEQ_GT(tp->sackblks[j].start, tp->rcv_nxt))))