From owner-svn-src-head@freebsd.org Thu Nov 1 18:19:11 2018 Return-Path: Delivered-To: svn-src-head@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 A38C210FAD12; Thu, 1 Nov 2018 18:19:11 +0000 (UTC) (envelope-from trasz@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5706384123; Thu, 1 Nov 2018 18:19:11 +0000 (UTC) (envelope-from trasz@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 1EB391F59D; Thu, 1 Nov 2018 18:19:11 +0000 (UTC) (envelope-from trasz@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wA1IJB82005303; Thu, 1 Nov 2018 18:19:11 GMT (envelope-from trasz@FreeBSD.org) Received: (from trasz@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wA1IJABJ005300; Thu, 1 Nov 2018 18:19:10 GMT (envelope-from trasz@FreeBSD.org) Message-Id: <201811011819.wA1IJABJ005300@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: trasz set sender to trasz@FreeBSD.org using -f From: Edward Tomasz Napierala Date: Thu, 1 Nov 2018 18:19:10 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r340015 - head/usr.sbin/nscd X-SVN-Group: head X-SVN-Commit-Author: trasz X-SVN-Commit-Paths: head/usr.sbin/nscd X-SVN-Commit-Revision: 340015 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 01 Nov 2018 18:19:11 -0000 Author: trasz Date: Thu Nov 1 18:19:10 2018 New Revision: 340015 URL: https://svnweb.freebsd.org/changeset/base/340015 Log: Unbreak nscd(8). Without this change the CMSG gets truncated. Reviewed by: des MFC after: 2 weeks Sponsored by: Chalmers University of Technology Differential Revision: https://reviews.freebsd.org/D17452 Modified: head/usr.sbin/nscd/nscdcli.c head/usr.sbin/nscd/query.c Modified: head/usr.sbin/nscd/nscdcli.c ============================================================================== --- head/usr.sbin/nscd/nscdcli.c Thu Nov 1 17:45:29 2018 (r340014) +++ head/usr.sbin/nscd/nscdcli.c Thu Nov 1 18:19:10 2018 (r340015) @@ -138,14 +138,14 @@ send_credentials(struct nscd_connection_ *connection, struct msghdr cred_hdr; struct iovec iov; - struct { + union { struct cmsghdr hdr; - struct cmsgcred creds; + char cred[CMSG_SPACE(sizeof(struct cmsgcred))]; } cmsg; TRACE_IN(send_credentials); memset(&cmsg, 0, sizeof(cmsg)); - cmsg.hdr.cmsg_len = sizeof(cmsg); + cmsg.hdr.cmsg_len = CMSG_LEN(sizeof(struct cmsgcred)); cmsg.hdr.cmsg_level = SOL_SOCKET; cmsg.hdr.cmsg_type = SCM_CREDS; @@ -153,7 +153,7 @@ send_credentials(struct nscd_connection_ *connection, cred_hdr.msg_iov = &iov; cred_hdr.msg_iovlen = 1; cred_hdr.msg_control = &cmsg; - cred_hdr.msg_controllen = sizeof(cmsg); + cred_hdr.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred)); iov.iov_base = &type; iov.iov_len = sizeof(int); Modified: head/usr.sbin/nscd/query.c ============================================================================== --- head/usr.sbin/nscd/query.c Thu Nov 1 17:45:29 2018 (r340014) +++ head/usr.sbin/nscd/query.c Thu Nov 1 18:19:10 2018 (r340015) @@ -160,7 +160,7 @@ on_query_startup(struct query_state *qstate) struct cmsgcred *cred; int elem_type; - struct { + union { struct cmsghdr hdr; char cred[CMSG_SPACE(sizeof(struct cmsgcred))]; } cmsg; @@ -171,8 +171,8 @@ on_query_startup(struct query_state *qstate) memset(&cred_hdr, 0, sizeof(struct msghdr)); cred_hdr.msg_iov = &iov; cred_hdr.msg_iovlen = 1; - cred_hdr.msg_control = (caddr_t)&cmsg; - cred_hdr.msg_controllen = CMSG_LEN(sizeof(struct cmsgcred)); + cred_hdr.msg_control = &cmsg; + cred_hdr.msg_controllen = CMSG_SPACE(sizeof(struct cmsgcred)); memset(&iov, 0, sizeof(struct iovec)); iov.iov_base = &elem_type; @@ -183,7 +183,8 @@ on_query_startup(struct query_state *qstate) return (-1); } - if (cmsg.hdr.cmsg_len < CMSG_LEN(sizeof(struct cmsgcred)) + if (cred_hdr.msg_controllen < CMSG_LEN(sizeof(struct cmsgcred)) + || cmsg.hdr.cmsg_len < CMSG_LEN(sizeof(struct cmsgcred)) || cmsg.hdr.cmsg_level != SOL_SOCKET || cmsg.hdr.cmsg_type != SCM_CREDS) { TRACE_OUT(on_query_startup);