From patchwork Mon Apr 18 14:59:22 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Casey Schaufler X-Patchwork-Id: 12816748 X-Patchwork-Delegate: paul@paul-moore.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 829C9C433EF for ; Mon, 18 Apr 2022 15:37:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345284AbiDRPkD (ORCPT ); Mon, 18 Apr 2022 11:40:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49542 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345461AbiDRPj0 (ORCPT ); Mon, 18 Apr 2022 11:39:26 -0400 Received: from sonic313-14.consmr.mail.ne1.yahoo.com (sonic313-14.consmr.mail.ne1.yahoo.com [66.163.185.37]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1F2BFB1E0 for ; Mon, 18 Apr 2022 08:03:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1650294188; bh=79dycniNE/psTMJPgnE9vt2X02zCvlolhDZ5Y1SzfAg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From:Subject:Reply-To; b=YvVaG6lZs/N49z8askMRaYzreE1K28eqZJJIgb99Tht6cprp6ugN/UWy3+YfK434TOgt8uMcp5Q3J22Lqz0TBdIPzGwTB62e1OtfpkUaAf4lnFe2SgTEUcKR26D3WjAAe7KV93MJSQHxtGkgbyMW+sUV8RIBbAOx9n5srUvGS5G77XeLLLLReTWxwVMgLYvHYftELs5CL1M3VEy9bBmGxfVkam//X2e4SHYHKcrEfASK1nx0pW1Hg7kJQv7CLHPZNYvAOUkn9VpR7D0iQWhdkRfWKF1OnmVaGkSNOgbVTPh5VNgjQUbXFFfCzOnsumxPK8CmzFH0LDNlH1odF6rLSQ== X-SONIC-DKIM-SIGN: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1650294188; bh=+lOKv10An49eve281wsstkGJB0oKVPkdcnSoFclbd0J=; h=X-Sonic-MF:From:To:Subject:Date:From:Subject; b=bL2jWqeTUACUvzLNcCPnqX1bZ8hCiOKKqQ2WSXDFmywOYoLyQ6PPVh+ldykxBGBTAM7homIt0T0DDVsys/+DSEv7FeTkXt730/TKmyII4YnftQYPWDi8tiWs2TEK9ReiLbphNEq7/8/fVyzaz1IYkcMrGx7aPI2fS2Z0J3OCy7DdjVW2qotvBNXnJG6jVbf5T6mH5sdh5ZHFbSAqiulfqKcPZPxNEJudSyLMTqAnBtAmxZuw+s53qEFQch9c9Ob68zDEkW7qOelaW035dopjYI5cihFhNg8pd/vneQhqSvldOSk6jjxBApqdri58LmA2p7J/3AgAn/NMKgbnMqJ8wQ== X-YMail-OSG: aZbeNU8VM1k3Tt5kDO1poy0mamdMLGcRqiPFESfoEbwQu7SZhmzM7BLxhG3H7l8 I53D2LX6kjnvGIrGUsdqrpKvKfMAcUW8neryWKruMzcyk8IjAimwoum8WuK4VhS6aIt_3V7B_w1R yd4C_aDkdcP2wL2FaXX16yfeFt0Ob66517WnY41TUMVDIR3geCYUEOrw60tRi278Dzt1yLmig0T8 RB0FwJhURbADE1zySAQ9iuXlmU.bITfyMJThz884nZuGvL4c.fWTfnOG4YewFmvWCLkfOQ8DAI8B mwTuuD8T0nZ35exAF5BuleT5sTNWoiNdP_YsfN9lsUPrMxDbqspmxAHXyXCnEwR6YbbCqxlmVpqP 05xIADNNaM0gzf1VmD5ubgn50wEl3eMJgPmroQ0Fydg1lcFb3NUFS2Qv5.cvlb05FjVrtdfn8jr4 UAZ7HreNjYHd1n_XLtUjtG1p5bNjOfExVz10_YRO4AYVLMtn9vG6IoyiVPxrkV4nLTwwhx7JByvN aBK5EiS5UnfxsBlIbdbO7wqZpPyapsghP3aATjgJFSIvlR3kNZcAmJUQbytCM1tELxj0OG9FeGWU VhypKI45hhfZvE3sAmD9hdgL3K8dFwYz061h4aB5o.8d4i3rHHtRfN0S5nYNstRWXL2a7AzXRmw4 vlAt16rEC4RPeabXomN.6jshK7DNimhWFSW5.CNUFgzgLs2.BNeAi6dtHjurCVLMsIalohVnlJvQ 4Pz2UIFz7cTExn33J3uTkPxGUMNS0P4p_bOWKC5ADkbgCqnWPHrpgfMtq11MhHR9gc_olabtERua zy5UJeyc0d2u.9d76Tm5iugjEL3lIHR0RmyOG4.1XEZnC.L4i9JSBBgMDhVeoqf4nysCScPH2CgJ oPXa8EOHXWlfn6Phn3mdSYvSUAOyvm3wVoxS3wAQUAUOZJWoi6Po0hSy1bsyYKyYOvgHGthnBSY2 Lv9NkojGQlM8h3OXYfU28ohC.wbFn65sjNYnbZFvdOC0.rBN_B4uBMRmmulEDbdMmGALEDee.PMB SwUQcsiNee7TVO8x48bVdgDWCLPQDnDWlIgqvc7eUzJEjBttAEEH5ChQut8qjdvSJT5YnMhaPa1W 8wYrRyXe00hOji4KToNuR4GoFD4U4rENqe_1N0El2eQyvoky.q97BIY7ibDd74kYFadEq5T4lbjF ESFJd50lDIsb6fF9CUwHH8M2p_ApzMWE2jkX_5EJjvokan3LdpZy0NWB3QA6zpzHOjNlaVX3bPP0 EalAeVXLq_OxNwFFyS4HY5XC6Mqoofcku6yQe.ekLipn7J5sLhBGIc7SBtr8xhWj7kO5bOVmuaKs 91272x1UnsxCdKzvEf3.cCTQqNfrKuBMDUFNntcHyfbC1oFfTxw5cELb70_9Kx5SQnhziJnzUQ1C yvp2Zg.Y18Y5wIGHqUGyuKzsEaL4g3ARvJMJfRyAxWceljBikWajm.70JSggIM648smqxAv4f0ZB V01uB39Z7UXPs6KR55W9RrRaxHMPAL1JDYnURQGxuzhxyRMElxoBiT5QuP8vuU1jK1PL.C7LiKzH YabeFi.J4wIF9mVwTKcNWU_T._7ZHEanWOLNDLGdrYwPebbQ0s4ro2plde7v0NmQXkXwE8gtVmHs 67kjhHSljYXXKhXQxjkRlLzDwwpkhTI5eCsaTnBWXvoHV076CiXl01pG2vGH8UT7VlOnxWMCm7IU kUSvihfIDCwkvDduQhRl374nErFlHPVGwVkqFOY5ivG4x.0WMJEfWSmg44D8NMTH8NuYQ..Jsl9O 3x6jag5ucaZ_56a.D.AOh5_.CsxSYDu2zfyjiLmYLiLl5vxv7bTw.PJXD3XhjtsTMQY4sUixTgQv MYWS6E0Tnml4Jxke3PAE.9PSlWFANH9L7rX.UnhZUeUqP7rfw3voRi6QNjmGYmMEY9rrmMNgSvcV je.zYMKNZX986O27AVB5yniuYl1VVzcL0ZtmwrOnzs3PHGchaRDERx6Ee6d97VPWACfVC_TOovto 19kVjTN4i4kGM3H7VXLtAemDhT2YdhOlaHcGYJc0EgSqXN6qPOe9QLZYFl4DvECFaEObdU7ziV_i ndUu6GdQWcA.J.Q4xATf9Voxq.oDhg9C8tsiY091eX9ilXWfJDMLepz8qVZUWDZJpZMVY9vEe9EJ i4maplZPoI9ocNenDnFEkB2LYeiX09vbKhIEzw9gqFKL8uLyWAmMuonNb9AzMEs.BUjBJ5A3Ua8m bMfQnEDwQmzBd5k_W3fIRFzeklrDB5cpBFgXAUpcG2_ImzKbci9.XwJDwWPcroeUJ3KEMLP0- X-Sonic-MF: Received: from sonic.gate.mail.ne1.yahoo.com by sonic313.consmr.mail.ne1.yahoo.com with HTTP; Mon, 18 Apr 2022 15:03:08 +0000 Received: by hermes--canary-production-bf1-5f49dbcd6-b5q4c (VZM Hermes SMTP Server) with ESMTPA ID e12cdaa14792a510c07372742bad7207; Mon, 18 Apr 2022 15:03:03 +0000 (UTC) From: Casey Schaufler To: casey.schaufler@intel.com, jmorris@namei.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org Cc: casey@schaufler-ca.com, linux-audit@redhat.com, keescook@chromium.org, john.johansen@canonical.com, penguin-kernel@i-love.sakura.ne.jp, paul@paul-moore.com, stephen.smalley.work@gmail.com, linux-kernel@vger.kernel.org Subject: [PATCH v35 06/29] LSM: Use lsmblob in security_audit_rule_match Date: Mon, 18 Apr 2022 07:59:22 -0700 Message-Id: <20220418145945.38797-7-casey@schaufler-ca.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220418145945.38797-1-casey@schaufler-ca.com> References: <20220418145945.38797-1-casey@schaufler-ca.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: selinux@vger.kernel.org Change the secid parameter of security_audit_rule_match to a lsmblob structure pointer. Pass the entry from the lsmblob structure for the approprite slot to the LSM hook. Change the users of security_audit_rule_match to use the lsmblob instead of a u32. The scaffolding function lsmblob_init() fills the blob with the value of the old secid, ensuring that it is available to the appropriate module hook. The sources of the secid, security_task_getsecid() and security_inode_getsecid(), will be converted to use the blob structure later in the series. At the point the use of lsmblob_init() is dropped. Signed-off-by: Casey Schaufler Acked-by: Paul Moore Cc: linux-audit@redhat.com Reviewed-by: John Johansen --- include/linux/security.h | 5 +++-- kernel/auditfilter.c | 6 ++++-- kernel/auditsc.c | 16 +++++++++++----- security/security.c | 5 +++-- 4 files changed, 21 insertions(+), 11 deletions(-) diff --git a/include/linux/security.h b/include/linux/security.h index 3666eddad59a..ee5d14dac65f 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -1955,7 +1955,7 @@ static inline int security_key_getsecurity(struct key *key, char **_buffer) int security_audit_rule_init(u32 field, u32 op, char *rulestr, struct audit_lsm_rules *lsmrules); int security_audit_rule_known(struct audit_krule *krule); -int security_audit_rule_match(u32 secid, u32 field, u32 op, +int security_audit_rule_match(struct lsmblob *blob, u32 field, u32 op, struct audit_lsm_rules *lsmrules); void security_audit_rule_free(struct audit_lsm_rules *lsmrules); @@ -1972,7 +1972,8 @@ static inline int security_audit_rule_known(struct audit_krule *krule) return 0; } -static inline int security_audit_rule_match(u32 secid, u32 field, u32 op, +static inline int security_audit_rule_match(struct lsmblob *blob, + u32 field, u32 op, struct audit_lsm_rules *lsmrules) { return 0; diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c index de75bd6ad866..15cd4fe35e9c 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -1337,6 +1337,7 @@ int audit_filter(int msgtype, unsigned int listtype) for (i = 0; i < e->rule.field_count; i++) { struct audit_field *f = &e->rule.fields[i]; + struct lsmblob blob; pid_t pid; u32 sid; @@ -1369,8 +1370,9 @@ int audit_filter(int msgtype, unsigned int listtype) case AUDIT_SUBJ_CLR: if (f->lsm_str) { security_current_getsecid_subj(&sid); - result = security_audit_rule_match(sid, - f->type, f->op, + lsmblob_init(&blob, sid); + result = security_audit_rule_match( + &blob, f->type, f->op, &f->lsm_rules); } break; diff --git a/kernel/auditsc.c b/kernel/auditsc.c index d272b5cf18a8..a9d5bfa37cb3 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -468,6 +468,7 @@ static int audit_filter_rules(struct task_struct *tsk, const struct cred *cred; int i, need_sid = 1; u32 sid; + struct lsmblob blob; unsigned int sessionid; if (ctx && rule->prio <= ctx->prio) @@ -678,8 +679,10 @@ static int audit_filter_rules(struct task_struct *tsk, security_current_getsecid_subj(&sid); need_sid = 0; } - result = security_audit_rule_match(sid, f->type, - f->op, &f->lsm_rules); + lsmblob_init(&blob, sid); + result = security_audit_rule_match(&blob, + f->type, f->op, + &f->lsm_rules); } break; case AUDIT_OBJ_USER: @@ -692,15 +695,17 @@ static int audit_filter_rules(struct task_struct *tsk, if (f->lsm_str) { /* Find files that match */ if (name) { + lsmblob_init(&blob, name->osid); result = security_audit_rule_match( - name->osid, + &blob, f->type, f->op, &f->lsm_rules); } else if (ctx) { list_for_each_entry(n, &ctx->names_list, list) { + lsmblob_init(&blob, n->osid); if (security_audit_rule_match( - n->osid, f->type, f->op, + &blob, f->type, f->op, &f->lsm_rules)) { ++result; break; @@ -710,7 +715,8 @@ static int audit_filter_rules(struct task_struct *tsk, /* Find ipc objects that match */ if (!ctx || ctx->type != AUDIT_IPC) break; - if (security_audit_rule_match(ctx->ipc.osid, + lsmblob_init(&blob, ctx->ipc.osid); + if (security_audit_rule_match(&blob, f->type, f->op, &f->lsm_rules)) ++result; diff --git a/security/security.c b/security/security.c index 9e0139b0d346..ced1c76a380f 100644 --- a/security/security.c +++ b/security/security.c @@ -2703,7 +2703,7 @@ void security_audit_rule_free(struct audit_lsm_rules *lsmrules) } } -int security_audit_rule_match(u32 secid, u32 field, u32 op, +int security_audit_rule_match(struct lsmblob *blob, u32 field, u32 op, struct audit_lsm_rules *lsmrules) { struct security_hook_list *hp; @@ -2714,7 +2714,8 @@ int security_audit_rule_match(u32 secid, u32 field, u32 op, continue; if (lsmrules->rule[hp->lsmid->slot] == NULL) continue; - rc = hp->hook.audit_rule_match(secid, field, op, + rc = hp->hook.audit_rule_match(blob->secid[hp->lsmid->slot], + field, op, &lsmrules->rule[hp->lsmid->slot]); if (rc) return rc;