From owner-svn-src-all@freebsd.org Sat Mar 30 23:43:59 2019 Return-Path: Delivered-To: svn-src-all@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 33C721568340; Sat, 30 Mar 2019 23:43:59 +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 A20D785132; Sat, 30 Mar 2019 23:43:58 +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 7A9691E33D; Sat, 30 Mar 2019 23:43:58 +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 x2UNhwwn028506; Sat, 30 Mar 2019 23:43:58 GMT (envelope-from jah@FreeBSD.org) Received: (from jah@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x2UNhw5m028505; Sat, 30 Mar 2019 23:43:58 GMT (envelope-from jah@FreeBSD.org) Message-Id: <201903302343.x2UNhw5m028505@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jah set sender to jah@FreeBSD.org using -f From: "Jason A. Harmening" Date: Sat, 30 Mar 2019 23:43:58 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r345741 - head/sys/compat/freebsd32 X-SVN-Group: head X-SVN-Commit-Author: jah X-SVN-Commit-Paths: head/sys/compat/freebsd32 X-SVN-Commit-Revision: 345741 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: A20D785132 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.94 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.999,0]; NEURAL_HAM_SHORT(-0.95)[-0.946,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: svn-src-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: Sat, 30 Mar 2019 23:43:59 -0000 Author: jah Date: Sat Mar 30 23:43:58 2019 New Revision: 345741 URL: https://svnweb.freebsd.org/changeset/base/345741 Log: 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 Reported by: Yuval Pavel Zholkover Reviewed by: markj MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D19768 Modified: head/sys/compat/freebsd32/freebsd32_misc.c Modified: head/sys/compat/freebsd32/freebsd32_misc.c ============================================================================== --- head/sys/compat/freebsd32/freebsd32_misc.c Sat Mar 30 21:04:08 2019 (r345740) +++ head/sys/compat/freebsd32/freebsd32_misc.c Sat Mar 30 23:43:58 2019 (r345741) @@ -1160,8 +1160,8 @@ 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) {