From owner-svn-src-stable@freebsd.org Sun Mar 19 15:46:27 2017 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 2A494D136F3; Sun, 19 Mar 2017 15:46:27 +0000 (UTC) (envelope-from kib@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 mx1.freebsd.org (Postfix) with ESMTPS id C77B31648; Sun, 19 Mar 2017 15:46:26 +0000 (UTC) (envelope-from kib@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id v2JFkP6B098187; Sun, 19 Mar 2017 15:46:25 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id v2JFkPam098186; Sun, 19 Mar 2017 15:46:25 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201703191546.v2JFkPam098186@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Sun, 19 Mar 2017 15:46:25 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r315558 - stable/11/sys/kern X-SVN-Group: stable-11 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: 2.1.23 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: Sun, 19 Mar 2017 15:46:27 -0000 Author: kib Date: Sun Mar 19 15:46:25 2017 New Revision: 315558 URL: https://svnweb.freebsd.org/changeset/base/315558 Log: MFC r315157: Accept linkers representation for ELF segments with zero on-disk length. Modified: stable/11/sys/kern/imgact_elf.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/imgact_elf.c ============================================================================== --- stable/11/sys/kern/imgact_elf.c Sun Mar 19 15:44:08 2017 (r315557) +++ stable/11/sys/kern/imgact_elf.c Sun Mar 19 15:46:25 2017 (r315558) @@ -522,7 +522,8 @@ __elfN(load_section)(struct image_params * While I'm here, might as well check for something else that * is invalid: filsz cannot be greater than memsz. */ - if ((off_t)filsz + offset > imgp->attr->va_size || filsz > memsz) { + if ((filsz != 0 && (off_t)filsz + offset > imgp->attr->va_size) || + filsz > memsz) { uprintf("elf_load_section: truncated ELF file\n"); return (ENOEXEC); } @@ -538,7 +539,9 @@ __elfN(load_section)(struct image_params * early and copy the initialized data into that first page. We * choose the second. */ - if (memsz > filsz) + if (filsz == 0) + map_len = 0; + else if (memsz > filsz) map_len = trunc_page_ps(offset + filsz, pagesize) - file_addr; else map_len = round_page_ps(offset + filsz, pagesize) - file_addr; @@ -570,7 +573,8 @@ __elfN(load_section)(struct image_params * segment in the file is extended to provide bss. It's a neat idea * to try and save a page, but it's a pain in the behind to implement. */ - copy_len = (offset + filsz) - trunc_page_ps(offset + filsz, pagesize); + copy_len = filsz == 0 ? 0 : (offset + filsz) - trunc_page_ps(offset + + filsz, pagesize); map_addr = trunc_page_ps((vm_offset_t)vmaddr + filsz, pagesize); map_len = round_page_ps((vm_offset_t)vmaddr + memsz, pagesize) - map_addr;