From patchwork Fri Jul 30 19:47:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 44524 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id AA325384F00D for ; Fri, 30 Jul 2021 19:52:33 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org AA325384F00D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1627674753; bh=d2gw2IJoPqhx9T4jHSH/E9BB7eWzXbb/GLzysopG29A=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=UP4KazKA/kDKz2Ct5lq0+cMZuJ0JXTSUY6RNxMosXJm6/JzcBabp44Xek3x7KfZOb t6C9cshsoM+S1Luo6hwgZzS+TWvfms5K8wYBBgZHTfxWL/HBo3uLHowT5UAzsEKIfz 5AuJpXYyTsBucNdIYKpfYq8tmU1wxy4DCDd+vmCA= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by sourceware.org (Postfix) with ESMTPS id DC8C6398203B for ; Fri, 30 Jul 2021 19:47:37 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org DC8C6398203B Received: by mail-pl1-x629.google.com with SMTP id d1so12362018pll.1 for ; Fri, 30 Jul 2021 12:47:37 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=d2gw2IJoPqhx9T4jHSH/E9BB7eWzXbb/GLzysopG29A=; b=nPb29Sj9PYGuK18Lp70f1zncLcKsKIxKz1vVgqWOIKJgaDFyiJdArbeKUtPsJD/p6b yKlhPLEVBHMZ969YSC3b4jKIi6a9+EMo31+CLWYzXAAknJ+nJE2Y2tXmCm/w3S1sAcQj yGvHFN9ucrx0QW5L7pF/q3vFyv48z4dDG4NzhMR8jV3Nquzd7mbbTT32IpUDtZGojTal URWYNpNuHN4+iW6+qhu035h5mnFVDSlfYN5pUP5WUhbe1juFozFlxs0yvEaz8Q2NqX5z VniBDuUNoSyNy5bsPcbu891ZGXi63fhUbVHL86K9UpXGomqoidH/OXSQPMEvC5gfmIqe llqQ== X-Gm-Message-State: AOAM532Td3vhZIygOt9hCzAw2FB2+Tsukj4gdm2piPOccHDIb3MV7KFh 2HYObZV9rRTKVfDqm06UNx5Tnv+VzlKq8Q== X-Google-Smtp-Source: ABdhPJwS0hhpnbiDrx21ldQd822sgds8WlnTYpLV/lCaTwcYhvjGdibzCQZiZbFKHtP64Vv30GA4iQ== X-Received: by 2002:a17:902:b717:b029:11a:fae3:ba7c with SMTP id d23-20020a170902b717b029011afae3ba7cmr2574281pls.28.1627674456797; Fri, 30 Jul 2021 12:47:36 -0700 (PDT) Received: from birita.. ([2804:431:c7cb:43e2:6c33:fd81:e602:d33]) by smtp.gmail.com with ESMTPSA id c12sm3041426pfl.56.2021.07.30.12.47.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Jul 2021 12:47:36 -0700 (PDT) To: libc-alpha@sourceware.org Subject: [PATCH v3 06/20] elf: Add _dl_audit_objopen Date: Fri, 30 Jul 2021 16:47:01 -0300 Message-Id: <20210730194715.881900-7-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210730194715.881900-1-adhemerval.zanella@linaro.org> References: <20210730194715.881900-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-12.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Netto Reply-To: Adhemerval Zanella Cc: John Mellor-Crummey Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" It consolidates the code required to call la_objopen() audit callback. No function change, checked on x86_64-linux-gnu. --- elf/Makefile | 3 ++- elf/dl-audit.c | 42 ++++++++++++++++++++++++++++++++++++++ elf/dl-load.c | 17 +-------------- elf/rtld.c | 23 ++------------------- sysdeps/generic/ldsodefs.h | 5 +++++ 5 files changed, 52 insertions(+), 38 deletions(-) create mode 100644 elf/dl-audit.c diff --git a/elf/Makefile b/elf/Makefile index 78ab9f2228..c6c97efd8c 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -35,7 +35,8 @@ dl-routines = $(addprefix dl-,load lookup object reloc deps \ execstack open close trampoline \ exception sort-maps lookup-direct \ call-libc-early-init write \ - thread_gscope_wait tls_init_tp) + thread_gscope_wait tls_init_tp \ + audit) ifeq (yes,$(use-ldconfig)) dl-routines += dl-cache endif diff --git a/elf/dl-audit.c b/elf/dl-audit.c new file mode 100644 index 0000000000..24d8557f18 --- /dev/null +++ b/elf/dl-audit.c @@ -0,0 +1,42 @@ +/* Audit common functions. + Copyright (C) 2021 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + . */ + +#include + +#ifdef SHARED +void +_dl_audit_objopen (struct link_map *l, Lmid_t nsid, bool check_audit) +{ + if (__glibc_likely (GLRO(dl_naudit) == 0) + || (check_audit && GL(dl_ns)[l->l_ns]._ns_loaded->l_auditing)) + return; + + struct audit_ifaces *afct = GLRO(dl_audit); + for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt) + { + if (afct->objopen != NULL) + { + struct auditstate *state = link_map_audit_state (l, cnt); + state->bindflags = afct->objopen (l, nsid, &state->cookie); + l->l_audit_any_plt |= state->bindflags != 0; + } + + afct = afct->next; + } +} +#endif diff --git a/elf/dl-load.c b/elf/dl-load.c index 433a59191a..c0b68638c0 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -1512,22 +1512,7 @@ cannot enable executable stack as shared object requires"); #ifdef SHARED /* Auditing checkpoint: we have a new object. */ - if (__glibc_unlikely (GLRO(dl_naudit) > 0) - && !GL(dl_ns)[l->l_ns]._ns_loaded->l_auditing) - { - struct audit_ifaces *afct = GLRO(dl_audit); - for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt) - { - if (afct->objopen != NULL) - { - struct auditstate *state = link_map_audit_state (l, cnt); - state->bindflags = afct->objopen (l, nsid, &state->cookie); - l->l_audit_any_plt |= state->bindflags != 0; - } - - afct = afct->next; - } - } + _dl_audit_objopen (l, nsid, true); #endif return l; diff --git a/elf/rtld.c b/elf/rtld.c index 1312378b5f..8008570f82 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -1057,25 +1057,6 @@ ERROR: audit interface '%s' requires version %d (maximum supported version %d); dlmargs.map->l_dont_set_tls_static = 1; } -/* Notify the the audit modules that the object MAP has already been - loaded. */ -static void -notify_audit_modules_of_loaded_object (struct link_map *map) -{ - struct audit_ifaces *afct = GLRO(dl_audit); - for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt) - { - if (afct->objopen != NULL) - { - struct auditstate *state = link_map_audit_state (map, cnt); - state->bindflags = afct->objopen (map, LM_ID_BASE, &state->cookie); - map->l_audit_any_plt |= state->bindflags != 0; - } - - afct = afct->next; - } -} - /* Load all audit modules. */ static void load_audit_modules (struct link_map *main_map, struct audit_list *audit_list) @@ -1094,8 +1075,8 @@ load_audit_modules (struct link_map *main_map, struct audit_list *audit_list) program and the dynamic linker itself). */ if (GLRO(dl_naudit) > 0) { - notify_audit_modules_of_loaded_object (main_map); - notify_audit_modules_of_loaded_object (&GL(dl_rtld_map)); + _dl_audit_objopen (main_map, LM_ID_BASE, false); + _dl_audit_objopen (&GL(dl_rtld_map), LM_ID_BASE, false); } } diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 9c15259236..3432bcd693 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -1346,6 +1346,11 @@ link_map_audit_state (struct link_map *l, size_t index) return &base[index]; } } + +/* Call the la_objopen() from the audit modules for the link_map L on the + namespace identification NSID. If CHECK_AUDIT is set it will also check + if main mapping of the namespace is an audit modules. */ +void _dl_audit_objopen (struct link_map *l, Lmid_t nsid, bool check_audit); #endif /* SHARED */ #if PTHREAD_IN_LIBC && defined SHARED