From patchwork Thu Feb 28 22:18:28 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Casey Schaufler X-Patchwork-Id: 10834001 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 209C0188E for ; Thu, 28 Feb 2019 22:20:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 133652F34F for ; Thu, 28 Feb 2019 22:20:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 07B182F606; Thu, 28 Feb 2019 22:20:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4EF2B2F3D6 for ; Thu, 28 Feb 2019 22:20:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730134AbfB1WUZ (ORCPT ); Thu, 28 Feb 2019 17:20:25 -0500 Received: from sonic315-15.consmr.mail.gq1.yahoo.com ([98.137.65.39]:42092 "EHLO sonic315-15.consmr.mail.gq1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729839AbfB1WUI (ORCPT ); Thu, 28 Feb 2019 17:20:08 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1551392406; bh=rTF09SnAjSsZdv1RDo3fHsuRZG2IUT0yBUCiFtcq8Ts=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From:Subject; b=Rhp57v+xFZgBVQ8XJ0sikrLmgPlZU6Cs4aKY/aWQSdZmzg6+ipD89NZ0pHIcS05RFT+bPxaiDrRabI5tu41f47SgTsYnC8VEDu4MUlPgzxsNSuY83udAvCL4VuQRFAFyeNWGaeqdiojWGYfsYlW/XHrKGRRVxSOit06SX2qKfBw74rGT/zkRhJEwmTABuDzFIccpRrlUDLGrNfDrdHoIt4ewiXB4YVFb++rvvrs27kEaKmLUi1C3UiCmNET0qYpY5gg4IcJrujRJgrYtaAZHVzO3/sVq/mS3skL5ssNGYKC+VAraMLbLdZGLQWQCWwOKVPDbzwjGyNZnanMBXORvcA== X-YMail-OSG: e2d.LFwVM1nuYBrWVpRYyXAVBSfaiJr9YbASGiJBgRvZw8CVgSTerUeGoq4LKbV holMZA8GNOH6HSjDrgptWC79jLed_oKB3EmJMhMR65LEOUnRRfBJOBoAhOcE4Grh1Q_b4tbUY_9W NhDSIzVaaANiYRLkkgQsQebSOcsTcxje2rSSHAUpULQ2Ijm.KG.ZDf4BROS9EAJUzSzpVTSqU8M0 WU3oHA9Orjy6DMC9Ua07o6we_UVeS_u1KN_VVz2xlecD_NXdMwJc09Nt1dd_0UEvZJw9e9ZiY3AQ kkgo2r_yEJWr.bZXdtjbP9R6xHfH_pbZOkR_vBlx3bSpo.yw659JeTEZTlaWUnvAFK4Za5OWeuCe TjlkAhDXjfx9aKb.TnVxTOQvDiPIfbKIYvZc7q1uFYHkdECRESmRpIGmo_WI4QxZtQHtAcltLzJa RER884OzKlW8nmsBufh_86Gcb7zZxkppGNLjvTJDp06cG4fnk6QECTiJPN.IZ_xghsV4AUMOtztu r9o5a013nEKMSDVIce7slp2Rgw08kRbOIKNKlBfYXx4CwaVpfkDkQKdwInj2uf9xwbm5_vxPFhBT HQjwOHqyXUfmIqms3oI60KK3dvV__4SGRd0_ActKtFsxBz0bPmR3EkroNBiGNNtTswm6U7ak.fS2 Q.uy4b2Hx.OmuFYyJkxV6chO6LyRwyemTdnYFjBMNgQvGD.2LiOCd4_kWIMkbyAtWywcH Received: from sonic.gate.mail.ne1.yahoo.com by sonic315.consmr.mail.gq1.yahoo.com with HTTP; Thu, 28 Feb 2019 22:20:06 +0000 Received: from c-67-169-65-224.hsd1.ca.comcast.net (EHLO localhost.localdomain) ([67.169.65.224]) by smtp409.mail.gq1.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID e8fded081226753664bb344863181a7a; Thu, 28 Feb 2019 22:20:03 +0000 (UTC) From: Casey Schaufler To: jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: keescook@chromium.org, john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com Subject: [PATCH 32/97] IMA: Clean out lsm_export scaffolding Date: Thu, 28 Feb 2019 14:18:28 -0800 Message-Id: <20190228221933.2551-33-casey@schaufler-ca.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20190228221933.2551-1-casey@schaufler-ca.com> References: <20190228221933.2551-1-casey@schaufler-ca.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Clean out the scaffolding used in the lsm_export transition. This requires changing some of the IMA internal interfaces from u32 to struct lsm_export pointers. Signed-off-by: Casey Schaufler --- security/integrity/ima/ima.h | 10 ++++++---- security/integrity/ima/ima_api.c | 9 +++++---- security/integrity/ima/ima_appraise.c | 4 +--- security/integrity/ima/ima_main.c | 25 ++++++++----------------- security/integrity/ima/ima_policy.c | 14 +++++++------- 5 files changed, 27 insertions(+), 35 deletions(-) diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index cc12f3449a72..2edaf4c41300 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -191,8 +191,9 @@ enum ima_hooks { }; /* LIM API function definitions */ -int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid, - int mask, enum ima_hooks func, int *pcr); +int ima_get_action(struct inode *inode, const struct cred *cred, + struct lsm_export *l, int mask, enum ima_hooks func, + int *pcr); int ima_must_measure(struct inode *inode, int mask, enum ima_hooks func); int ima_collect_measurement(struct integrity_iint_cache *iint, struct file *file, void *buf, loff_t size, @@ -212,8 +213,9 @@ void ima_free_template_entry(struct ima_template_entry *entry); const char *ima_d_path(const struct path *path, char **pathbuf, char *filename); /* IMA policy related functions */ -int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, - enum ima_hooks func, int mask, int flags, int *pcr); +int ima_match_policy(struct inode *inode, const struct cred *cred, + struct lsm_export *l, enum ima_hooks func, int mask, + int flags, int *pcr); void ima_init_policy(void); void ima_update_policy(void); void ima_update_policy_flag(void); diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c index c7505fb122d4..7e493af96134 100644 --- a/security/integrity/ima/ima_api.c +++ b/security/integrity/ima/ima_api.c @@ -159,7 +159,7 @@ void ima_add_violation(struct file *file, const unsigned char *filename, * ima_get_action - appraise & measure decision based on policy. * @inode: pointer to inode to measure * @cred: pointer to credentials structure to validate - * @secid: secid of the task being validated + * @l: LAM data of the task being validated * @mask: contains the permission mask (MAY_READ, MAY_WRITE, MAY_EXEC, * MAY_APPEND) * @func: caller identifier @@ -175,14 +175,15 @@ void ima_add_violation(struct file *file, const unsigned char *filename, * Returns IMA_MEASURE, IMA_APPRAISE mask. * */ -int ima_get_action(struct inode *inode, const struct cred *cred, u32 secid, - int mask, enum ima_hooks func, int *pcr) +int ima_get_action(struct inode *inode, const struct cred *cred, + struct lsm_export *l, int mask, enum ima_hooks func, + int *pcr) { int flags = IMA_MEASURE | IMA_AUDIT | IMA_APPRAISE | IMA_HASH; flags &= ima_policy_flag; - return ima_match_policy(inode, cred, secid, func, mask, flags, pcr); + return ima_match_policy(inode, cred, l, func, mask, flags, pcr); } /* diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index d0580a1f157e..b2203ff2bef5 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -50,15 +50,13 @@ bool is_ima_appraise_enabled(void) */ int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func) { - u32 secid; struct lsm_export le; if (!ima_appraise) return 0; security_task_getsecid(current, &le); - lsm_export_secid(&le, &secid); - return ima_match_policy(inode, current_cred(), secid, func, mask, + return ima_match_policy(inode, current_cred(), &le, func, mask, IMA_APPRAISE | IMA_HASH, NULL); } diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 7efc806eb5ab..c3186ae42371 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -169,8 +169,8 @@ void ima_file_free(struct file *file) } static int process_measurement(struct file *file, const struct cred *cred, - u32 secid, char *buf, loff_t size, int mask, - enum ima_hooks func) + struct lsm_export *l, char *buf, loff_t size, + int mask, enum ima_hooks func) { struct inode *inode = file_inode(file); struct integrity_iint_cache *iint = NULL; @@ -192,7 +192,7 @@ static int process_measurement(struct file *file, const struct cred *cred, * bitmask based on the appraise/audit/measurement policy. * Included is the appraise submask. */ - action = ima_get_action(inode, cred, secid, mask, func, &pcr); + action = ima_get_action(inode, cred, l, mask, func, &pcr); violation_check = ((func == FILE_CHECK || func == MMAP_CHECK) && (ima_policy_flag & IMA_MEASURE)); if (!action && !violation_check) @@ -335,13 +335,11 @@ static int process_measurement(struct file *file, const struct cred *cred, */ int ima_file_mmap(struct file *file, unsigned long prot) { - u32 secid; struct lsm_export le; if (file && (prot & PROT_EXEC)) { security_task_getsecid(current, &le); - lsm_export_secid(&le, &secid); - return process_measurement(file, current_cred(), secid, NULL, + return process_measurement(file, current_cred(), &le, NULL, 0, MAY_EXEC, MMAP_CHECK); } @@ -364,19 +362,16 @@ int ima_file_mmap(struct file *file, unsigned long prot) int ima_bprm_check(struct linux_binprm *bprm) { int ret; - u32 secid; struct lsm_export le; security_task_getsecid(current, &le); - lsm_export_secid(&le, &secid); - ret = process_measurement(bprm->file, current_cred(), secid, NULL, 0, + ret = process_measurement(bprm->file, current_cred(), &le, NULL, 0, MAY_EXEC, BPRM_CHECK); if (ret) return ret; security_cred_getsecid(bprm->cred, &le); - lsm_export_secid(&le, &secid); - return process_measurement(bprm->file, bprm->cred, secid, NULL, 0, + return process_measurement(bprm->file, bprm->cred, &le, NULL, 0, MAY_EXEC, CREDS_CHECK); } @@ -392,12 +387,10 @@ int ima_bprm_check(struct linux_binprm *bprm) */ int ima_file_check(struct file *file, int mask) { - u32 secid; struct lsm_export le; security_task_getsecid(current, &le); - lsm_export_secid(&le, &secid); - return process_measurement(file, current_cred(), secid, NULL, 0, + return process_measurement(file, current_cred(), &le, NULL, 0, mask & (MAY_READ | MAY_WRITE | MAY_EXEC | MAY_APPEND), FILE_CHECK); } @@ -475,7 +468,6 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, enum kernel_read_file_id read_id) { enum ima_hooks func; - u32 secid; struct lsm_export le; if (!file && read_id == READING_FIRMWARE) { @@ -499,8 +491,7 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, func = read_idmap[read_id] ?: FILE_CHECK; security_task_getsecid(current, &le); - lsm_export_secid(&le, &secid); - return process_measurement(file, current_cred(), secid, buf, size, + return process_measurement(file, current_cred(), &le, buf, size, MAY_READ, func); } diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 6f05e96e5db0..b5d12db3cfb3 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -286,7 +286,7 @@ static void ima_lsm_update_rules(void) * Returns true on rule match, false on failure. */ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode, - const struct cred *cred, u32 secid, + const struct cred *cred, struct lsm_export *l, enum ima_hooks func, int mask) { int i; @@ -346,8 +346,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode, case LSM_SUBJ_USER: case LSM_SUBJ_ROLE: case LSM_SUBJ_TYPE: - lsm_export_to_all(&le, secid); - rc = security_filter_rule_match(&le, + rc = security_filter_rule_match(l, rule->lsm[i].type, Audit_equal, rule->lsm[i].rule, @@ -396,7 +395,7 @@ static int get_subaction(struct ima_rule_entry *rule, enum ima_hooks func) * @inode: pointer to an inode for which the policy decision is being made * @cred: pointer to a credentials structure for which the policy decision is * being made - * @secid: LSM secid of the task to be validated + * @l: LSM data of the task to be validated * @func: IMA hook identifier * @mask: requested action (MAY_READ | MAY_WRITE | MAY_APPEND | MAY_EXEC) * @pcr: set the pcr to extend @@ -408,8 +407,9 @@ static int get_subaction(struct ima_rule_entry *rule, enum ima_hooks func) * list when walking it. Reads are many orders of magnitude more numerous * than writes so ima_match_policy() is classical RCU candidate. */ -int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, - enum ima_hooks func, int mask, int flags, int *pcr) +int ima_match_policy(struct inode *inode, const struct cred *cred, + struct lsm_export *l, enum ima_hooks func, int mask, + int flags, int *pcr) { struct ima_rule_entry *entry; int action = 0, actmask = flags | (flags << 1); @@ -420,7 +420,7 @@ int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, if (!(entry->action & actmask)) continue; - if (!ima_match_rules(entry, inode, cred, secid, func, mask)) + if (!ima_match_rules(entry, inode, cred, l, func, mask)) continue; action |= entry->flags & IMA_ACTION_FLAGS;