From owner-svn-src-all@freebsd.org Fri Jun 19 10:33:46 2020 Return-Path: Delivered-To: svn-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id AEA9D346F8A; Fri, 19 Jun 2020 10:33:46 +0000 (UTC) (envelope-from kib@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) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 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 49pFXB41Rrz3c1l; Fri, 19 Jun 2020 10:33:46 +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 mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 6C49119D1E; Fri, 19 Jun 2020 10:33:46 +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 05JAXk2f066652; Fri, 19 Jun 2020 10:33:46 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 05JAXkjo066651; Fri, 19 Jun 2020 10:33:46 GMT (envelope-from kib@FreeBSD.org) Message-Id: <202006191033.05JAXkjo066651@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Fri, 19 Jun 2020 10:33:46 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r362370 - stable/12/libexec/rtld-elf X-SVN-Group: stable-12 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/12/libexec/rtld-elf X-SVN-Commit-Revision: 362370 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.33 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: Fri, 19 Jun 2020 10:33:46 -0000 Author: kib Date: Fri Jun 19 10:33:45 2020 New Revision: 362370 URL: https://svnweb.freebsd.org/changeset/base/362370 Log: MFC r362128: rtld: set osrel when in the direct exec mode. Modified: stable/12/libexec/rtld-elf/rtld.c Directory Properties: stable/12/ (props changed) Modified: stable/12/libexec/rtld-elf/rtld.c ============================================================================== --- stable/12/libexec/rtld-elf/rtld.c Fri Jun 19 09:27:58 2020 (r362369) +++ stable/12/libexec/rtld-elf/rtld.c Fri Jun 19 10:33:45 2020 (r362370) @@ -384,8 +384,9 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entr const char *argv0, *binpath; caddr_t imgentry; char buf[MAXPATHLEN]; - int argc, fd, i, phnum, rtld_argc; - bool dir_enable, explicit_fd, search_in_path; + int argc, fd, i, mib[4], old_osrel, osrel, phnum, rtld_argc; + size_t sz; + bool dir_enable, direct_exec, explicit_fd, search_in_path; /* * On entry, the dynamic linker itself has not been relocated yet. @@ -423,6 +424,7 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entr main_argv = argv; trust = !issetugid(); + direct_exec = false; md_abi_variant_hook(aux_info); @@ -438,6 +440,21 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entr argv0); rtld_die(); } + direct_exec = true; + + /* + * Set osrel for us, it is later reset to the binary' + * value before first instruction of code from the binary + * is executed. + */ + mib[0] = CTL_KERN; + mib[1] = KERN_PROC; + mib[2] = KERN_PROC_OSREL; + mib[3] = getpid(); + osrel = __FreeBSD_version; + sz = sizeof(old_osrel); + (void)sysctl(mib, 4, &old_osrel, &sz, &osrel, sizeof(osrel)); + dbg("opening main program in direct exec mode"); if (argc >= 2) { rtld_argc = parse_args(argv, argc, &search_in_path, &fd, &argv0); @@ -767,6 +784,18 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_proc, Obj_Entr * init functions. */ pre_init(); + + if (direct_exec) { + /* Set osrel for direct-execed binary */ + mib[0] = CTL_KERN; + mib[1] = KERN_PROC; + mib[2] = KERN_PROC_OSREL; + mib[3] = getpid(); + osrel = obj_main->osrel; + sz = sizeof(old_osrel); + dbg("setting osrel to %d", osrel); + (void)sysctl(mib, 4, &old_osrel, &sz, &osrel, sizeof(osrel)); + } wlock_acquire(rtld_bind_lock, &lockstate);