From owner-svn-src-stable@FreeBSD.ORG Tue Jun 9 19:41:17 2015 Return-Path: Delivered-To: svn-src-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id B5512ECA; Tue, 9 Jun 2015 19:41:17 +0000 (UTC) (envelope-from asomers@FreeBSD.org) Received: from svn.freebsd.org (svn.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 A2FF71CEF; Tue, 9 Jun 2015 19:41:17 +0000 (UTC) (envelope-from asomers@FreeBSD.org) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.9/8.14.9) with ESMTP id t59JfHk4078315; Tue, 9 Jun 2015 19:41:17 GMT (envelope-from asomers@FreeBSD.org) Received: (from asomers@localhost) by svn.freebsd.org (8.14.9/8.14.9/Submit) id t59JfH36078314; Tue, 9 Jun 2015 19:41:17 GMT (envelope-from asomers@FreeBSD.org) Message-Id: <201506091941.t59JfH36078314@svn.freebsd.org> X-Authentication-Warning: svn.freebsd.org: asomers set sender to asomers@FreeBSD.org using -f From: Alan Somers Date: Tue, 9 Jun 2015 19:41:17 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r284191 - stable/10/sys/kern X-SVN-Group: stable-10 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: Tue, 09 Jun 2015 19:41:17 -0000 Author: asomers Date: Tue Jun 9 19:41:16 2015 New Revision: 284191 URL: https://svnweb.freebsd.org/changeset/base/284191 Log: MFC r283115 Properly null-terminate strings in a kernel dump header. A version string longer than 192 bytes will cause the version field of a dump header to overflow. strncpy doesn't null terminate it, so savecore will print a corrupted info file. Using strlcpy fixes the bug. Modified: stable/10/sys/kern/kern_shutdown.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/kern/kern_shutdown.c ============================================================================== --- stable/10/sys/kern/kern_shutdown.c Tue Jun 9 19:22:13 2015 (r284190) +++ stable/10/sys/kern/kern_shutdown.c Tue Jun 9 19:41:16 2015 (r284191) @@ -882,16 +882,16 @@ mkdumpheader(struct kerneldumpheader *kd { bzero(kdh, sizeof(*kdh)); - strncpy(kdh->magic, magic, sizeof(kdh->magic)); - strncpy(kdh->architecture, MACHINE_ARCH, sizeof(kdh->architecture)); + strlcpy(kdh->magic, magic, sizeof(kdh->magic)); + strlcpy(kdh->architecture, MACHINE_ARCH, sizeof(kdh->architecture)); kdh->version = htod32(KERNELDUMPVERSION); kdh->architectureversion = htod32(archver); kdh->dumplength = htod64(dumplen); kdh->dumptime = htod64(time_second); kdh->blocksize = htod32(blksz); - strncpy(kdh->hostname, prison0.pr_hostname, sizeof(kdh->hostname)); - strncpy(kdh->versionstring, version, sizeof(kdh->versionstring)); + strlcpy(kdh->hostname, prison0.pr_hostname, sizeof(kdh->hostname)); + strlcpy(kdh->versionstring, version, sizeof(kdh->versionstring)); if (panicstr != NULL) - strncpy(kdh->panicstring, panicstr, sizeof(kdh->panicstring)); + strlcpy(kdh->panicstring, panicstr, sizeof(kdh->panicstring)); kdh->parity = kerneldump_parity(kdh); }