From owner-svn-src-stable-11@freebsd.org Wed Sep 5 21:23:41 2018 Return-Path: Delivered-To: svn-src-stable-11@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 0ACF4FFD8E2; Wed, 5 Sep 2018 21:23:41 +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 TLSv1.2 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 B428A741D3; Wed, 5 Sep 2018 21:23:40 +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 951102B3A3; Wed, 5 Sep 2018 21:23:40 +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 w85LNeRG079590; Wed, 5 Sep 2018 21:23:40 GMT (envelope-from kib@FreeBSD.org) Received: (from kib@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w85LNeUw079589; Wed, 5 Sep 2018 21:23:40 GMT (envelope-from kib@FreeBSD.org) Message-Id: <201809052123.w85LNeUw079589@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: kib set sender to kib@FreeBSD.org using -f From: Konstantin Belousov Date: Wed, 5 Sep 2018 21:23:40 +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: r338482 - stable/11/libexec/rtld-elf X-SVN-Group: stable-11 X-SVN-Commit-Author: kib X-SVN-Commit-Paths: stable/11/libexec/rtld-elf X-SVN-Commit-Revision: 338482 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-11@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: SVN commit messages for only the 11-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 Sep 2018 21:23:41 -0000 Author: kib Date: Wed Sep 5 21:23:40 2018 New Revision: 338482 URL: https://svnweb.freebsd.org/changeset/base/338482 Log: MFC r324856: Don't call realpath(3) from libmap rtld code. Modified: stable/11/libexec/rtld-elf/libmap.c Directory Properties: stable/11/ (props changed) Modified: stable/11/libexec/rtld-elf/libmap.c ============================================================================== --- stable/11/libexec/rtld-elf/libmap.c Wed Sep 5 21:15:48 2018 (r338481) +++ stable/11/libexec/rtld-elf/libmap.c Wed Sep 5 21:23:40 2018 (r338482) @@ -36,6 +36,8 @@ struct lmp { static TAILQ_HEAD(lmc_list, lmc) lmc_head = TAILQ_HEAD_INITIALIZER(lmc_head); struct lmc { char *path; + dev_t dev; + ino_t ino; TAILQ_ENTRY(lmc) next; }; @@ -99,45 +101,45 @@ lmc_parse_file(char *path) struct lmc *p; struct stat st; int fd; - char *rpath; char *lm_map; - rpath = realpath(path, NULL); - if (rpath == NULL) - return; - TAILQ_FOREACH(p, &lmc_head, next) { - if (strcmp(p->path, rpath) == 0) { - free(rpath); + if (strcmp(p->path, path) == 0) return; - } } - fd = open(rpath, O_RDONLY | O_CLOEXEC); + fd = open(path, O_RDONLY | O_CLOEXEC); if (fd == -1) { - dbg("lm_parse_file: open(\"%s\") failed, %s", rpath, + dbg("lm_parse_file: open(\"%s\") failed, %s", path, rtld_strerror(errno)); - free(rpath); return; } if (fstat(fd, &st) == -1) { close(fd); - dbg("lm_parse_file: fstat(\"%s\") failed, %s", rpath, + dbg("lm_parse_file: fstat(\"%s\") failed, %s", path, rtld_strerror(errno)); - free(rpath); return; } + + TAILQ_FOREACH(p, &lmc_head, next) { + if (p->dev == st.st_dev && p->ino == st.st_ino) { + close(fd); + return; + } + } + lm_map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0); if (lm_map == (const char *)MAP_FAILED) { close(fd); - dbg("lm_parse_file: mmap(\"%s\") failed, %s", rpath, + dbg("lm_parse_file: mmap(\"%s\") failed, %s", path, rtld_strerror(errno)); - free(rpath); return; } close(fd); p = xmalloc(sizeof(struct lmc)); - p->path = rpath; + p->path = xstrdup(path); + p->dev = st.st_dev; + p->ino = st.st_ino; TAILQ_INSERT_HEAD(&lmc_head, p, next); lmc_parse(lm_map, st.st_size); munmap(lm_map, st.st_size); @@ -151,26 +153,19 @@ lmc_parse_dir(char *idir) struct lmc *p; char conffile[MAXPATHLEN]; char *ext; - char *rpath; - rpath = realpath(idir, NULL); - if (rpath == NULL) - return; - TAILQ_FOREACH(p, &lmc_head, next) { - if (strcmp(p->path, rpath) == 0) { - free(rpath); + if (strcmp(p->path, idir) == 0) return; - } } d = opendir(idir); - if (d == NULL) { - free(rpath); + if (d == NULL) return; - } p = xmalloc(sizeof(struct lmc)); - p->path = rpath; + p->path = xstrdup(idir); + p->dev = NODEV; + p->ino = 0; TAILQ_INSERT_HEAD(&lmc_head, p, next); while ((dp = readdir(d)) != NULL) {