From owner-svn-src-stable@freebsd.org Fri Sep 4 00:42:06 2015 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D138D9C93F4; Fri, 4 Sep 2015 00:42:06 +0000 (UTC) (envelope-from delphij@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id C16D63E8; Fri, 4 Sep 2015 00:42:06 +0000 (UTC) (envelope-from delphij@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.70]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id t840g6Z0047064; Fri, 4 Sep 2015 00:42:06 GMT (envelope-from delphij@FreeBSD.org) Received: (from delphij@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id t840g6Mt047063; Fri, 4 Sep 2015 00:42:06 GMT (envelope-from delphij@FreeBSD.org) Message-Id: <201509040042.t840g6Mt047063@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: delphij set sender to delphij@FreeBSD.org using -f From: Xin LI Date: Fri, 4 Sep 2015 00:42:06 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r287447 - stable/9/usr.bin/bluetooth/btsockstat X-SVN-Group: stable-9 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Sep 2015 00:42:06 -0000 Author: delphij Date: Fri Sep 4 00:42:05 2015 New Revision: 287447 URL: https://svnweb.freebsd.org/changeset/base/287447 Log: MFC r287345: Drop group privileges after opening the kvm descriptor, otherwise, the code would not drop privileges as expected. While there also add checks for the drop and bail out immediately if we failed. Modified: stable/9/usr.bin/bluetooth/btsockstat/btsockstat.c Directory Properties: stable/9/usr.bin/bluetooth/ (props changed) Modified: stable/9/usr.bin/bluetooth/btsockstat/btsockstat.c ============================================================================== --- stable/9/usr.bin/bluetooth/btsockstat/btsockstat.c Fri Sep 4 00:41:29 2015 (r287446) +++ stable/9/usr.bin/bluetooth/btsockstat/btsockstat.c Fri Sep 4 00:42:05 2015 (r287447) @@ -154,9 +154,9 @@ main(int argc, char *argv[]) * Discard setgid privileges if not the running kernel so that * bad guys can't print interesting stuff from kernel memory. */ - if (memf != NULL) - setgid(getgid()); + if (setgid(getgid()) != 0) + err(1, "setgid"); kvmd = kopen(memf); if (kvmd == NULL) @@ -583,15 +583,9 @@ kopen(char const *memf) kvm_t *kvmd = NULL; char errbuf[_POSIX2_LINE_MAX]; - /* - * Discard setgid privileges if not the running kernel so that - * bad guys can't print interesting stuff from kernel memory. - */ - - if (memf != NULL) - setgid(getgid()); - kvmd = kvm_openfiles(NULL, memf, NULL, O_RDONLY, errbuf); + if (setgid(getgid()) != 0) + err(1, "setgid"); if (kvmd == NULL) { warnx("kvm_openfiles: %s", errbuf); return (NULL);