From owner-svn-src-stable-12@freebsd.org Sun Apr 7 19:02:34 2019 Return-Path: Delivered-To: svn-src-stable-12@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 10F941567E8C; Sun, 7 Apr 2019 19:02:34 +0000 (UTC) (envelope-from jah@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 9DB336D9BE; Sun, 7 Apr 2019 19:02:33 +0000 (UTC) (envelope-from jah@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 7A8C51861B; Sun, 7 Apr 2019 19:02:33 +0000 (UTC) (envelope-from jah@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x37J2X0k017585; Sun, 7 Apr 2019 19:02:33 GMT (envelope-from jah@FreeBSD.org) Received: (from jah@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x37J2Xmv017584; Sun, 7 Apr 2019 19:02:33 GMT (envelope-from jah@FreeBSD.org) Message-Id: <201904071902.x37J2Xmv017584@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jah set sender to jah@FreeBSD.org using -f From: "Jason A. Harmening" Date: Sun, 7 Apr 2019 19:02:33 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r346019 - stable/12/sys/compat/freebsd32 X-SVN-Group: stable-12 X-SVN-Commit-Author: jah X-SVN-Commit-Paths: stable/12/sys/compat/freebsd32 X-SVN-Commit-Revision: 346019 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 9DB336D9BE X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.95)[-0.950,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 07 Apr 2019 19:02:34 -0000 Author: jah Date: Sun Apr 7 19:02:33 2019 New Revision: 346019 URL: https://svnweb.freebsd.org/changeset/base/346019 Log: MFC r345741: freebsd32: fix padding of computed control message length for recvmsg() Each control message region must be aligned on a 4-byte boundary on 32-bit architectures. The 32-bit compat shim for recvmsg() gets the actual layout right, but doesn't pad the payload length when computing msg_controllen for the output message header. If a control message contains an unaligned payload, such as the 1-byte TTL field in the example attached to PR 236737, this can produce control message payload boundaries that extend beyond the boundary reported by msg_controllen. PR: 236737 Modified: stable/12/sys/compat/freebsd32/freebsd32_misc.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/compat/freebsd32/freebsd32_misc.c ============================================================================== --- stable/12/sys/compat/freebsd32/freebsd32_misc.c Sun Apr 7 18:39:55 2019 (r346018) +++ stable/12/sys/compat/freebsd32/freebsd32_misc.c Sun Apr 7 19:02:33 2019 (r346019) @@ -1183,8 +1183,8 @@ freebsd32_copy_msg_out(struct msghdr *msg, struct mbuf cm = NULL; } - msg->msg_controllen += FREEBSD32_ALIGN(sizeof(*cm)) + - datalen_out; + msg->msg_controllen += + FREEBSD32_CMSG_SPACE(datalen_out); } } if (len == 0 && m != NULL) {