From patchwork Wed Aug 26 14:52:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Casey Schaufler X-Patchwork-Id: 11738943 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1EE3717C7 for ; Wed, 26 Aug 2020 15:14:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F12E720738 for ; Wed, 26 Aug 2020 15:14:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=yahoo.com header.i=@yahoo.com header.b="qbZhEYao" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726802AbgHZPOr (ORCPT ); Wed, 26 Aug 2020 11:14:47 -0400 Received: from sonic302-27.consmr.mail.ne1.yahoo.com ([66.163.186.153]:38071 "EHLO sonic302-27.consmr.mail.ne1.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727080AbgHZPOq (ORCPT ); Wed, 26 Aug 2020 11:14:46 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1598454884; bh=BaOyehg80wFOhSiPHeraW2IfHnvvM8nVE7eT/PRDJX8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From:Subject; b=qbZhEYaoYuDqKV2K2xEgbIMJrWBpxfVYsQfB7kD+0/7apnfI2FBr5HYlTkkzd55HcK6cHgi1kO6UzjjosL7RExwZVpgtSA1PNCGM0mBunD9slymuaKCW9yAYcSuufZ7rGHHe6uxJB87jzWKONQAgjFSUkaATDbykuB0tmT5iS1Hv5wJQRu8bkqMTXumCoG6SaJU2QETIGbuJ13SX6jRzC68d0gY8EDJX1vJQ/dzSb9S12g7gtjBJRocLieWUdWNm4w/aca2qMt1lQMowBTHubzApq4ViMRp4Sp/8cDPeXisPy4PEelaMht1msU0yvdig/ZO/KSug9WX2lZI1xc5t1g== X-YMail-OSG: C3e05QAVM1nQCu5XR23jPAh2OXK5.HwtF1zd_1VPSY2NsBDVFF6OKS0lO9U8nNO 8ChPKeCwgBVbwP6VYwdQy9EBOX8omVtTjW7E_2w2HaTQ7cQDdSduI_25G0SmikrcPYEIvvrO5g7a RFkvibTiAlF1hTQX11XswtsA_vuDulzaikRdEreP3oJ_Ty8p07_2l0yOfdP1FgCLM2SgKFDJdmK8 sXXGEH1BgmwUXPOACgvBRZP6WE0BHwbAvnaAJyZyhQwTigBKYgx3fDxlLvms8RXqI1.nRZB.lkqG 4d5UW3E56QrXh8DSEBkI2ypQIXKd7pkUBxFZIYwi06eVDIoM_njJcLVOncZQQri5D79zxrkDy3pr rxg1bcND3i2faHCeUAGUF3hVfU3uAQxHuQ.eNF82iRax8OO8Zbs6KyYDqSbW4DaYngfE9IsnIjpe 9bdm0qzKllOHPL.8wDae3bnV3MDq1cOYI2bnTquY9vDsrIgrKR8wK8RNs0UpXW6i4CcIQAxqDkmj ESblOXE2JVVmwzA.7i3PpHr84eW1p5Ll.TfQJw39IxjX5JWM20DEyQQClNuvLmwJhPlQTVmp2hwc IuvWb9BM7Fz1WW.zADAEGoX.qqtPTBU.Z0qeoED8x4am6JANT4NLvB2sKXCIs36f1.il35DzYbKY eT4e74LEa97jzdCDO9KCWySZi4M4q3UyoU.PG0tT_Z7URMSHXLl7SHfll9PdCu.k4CWQ.oQw7Iok wYJ2946z_8sX5J3JKfsIOrESQ16Gh2IUe4uEs.v.0llxbViPSZ5xlh3PzwEKF041EjRc087reY2v SCM7_jDegAskmEvucoCxX.tnToTOukHbm3VbZuYeB.OcSfJDSvWCtzFPMIfSeBDMihM8bo43mlFk F5jSe0yfOA5gcAqtivuL7xHSuYo6WBLra1weseuGRZeFITOwYSXMNdBlyk96pQK19nlwX2YfNkYI 2.wmoZnE2hCHPrxK_32d76sJWMB_i6rGqMZJyPkLeQb5Q0HuLF_w3xucztK5a8N9Qkd7BkT6VZ4y 82dw1nbIj_K5G7nZcp5LD3cP6asnThNx8o4kVtBD9czQKE6nrOKbdNc5Rc3T1CwiOvYwmZg_GKKW JzWyKIDM_ZceZ1QJpAb.ra4HxIHfB7R5gkxU7NWa1rhlyOerYgdYKr2P0paI1rixfhVroeIgOW6H obvCuNpyQBqH4IyO0vX8SA.DHm7yKyTe.q.tqmW3pmGe5eIs89gD1.M652va8._pLgqb4vLBQde3 1_zw3PKsdysXWGmVnNUdhctRI1PThgGRodKroWq3Y0bw3qzYLhXK5hqmh.MqtLbuH8.64Jj9hZZu Vp_m7OOgL4Q.RqYr_rpmOfjtIUhz3f_hC_zeERxhu6fX.j4kKctGGoPHwKPCF3HJ8da_ZSobeXIa 4p.Hqo9bzLeuE9Ue7v5fRZuvZ3AUKoisVe.ltpnhn9sJE3XZtBAhxRb1sBnSwjLk4AgkfLDcHlT8 DxKlbpMN9YdQa76cjZIIiWJmRZVMMFEDuewPcbg6GWtnjdzvrSjXlGe1hay4RkcdAoZRBdt2km9D yDCTSWAjHxVI1B4TrX.m8 Received: from sonic.gate.mail.ne1.yahoo.com by sonic302.consmr.mail.ne1.yahoo.com with HTTP; Wed, 26 Aug 2020 15:14:44 +0000 Received: by smtp422.mail.gq1.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID c941a296967fa92c3240eb0ee1b2c3e6; Wed, 26 Aug 2020 15:14:43 +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, sds@tycho.nsa.gov, linux-integrity@vger.kernel.org Subject: [PATCH v20 12/23] IMA: Change internal interfaces to use lsmblobs Date: Wed, 26 Aug 2020 07:52:36 -0700 Message-Id: <20200826145247.10029-13-casey@schaufler-ca.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200826145247.10029-1-casey@schaufler-ca.com> References: <20200826145247.10029-1-casey@schaufler-ca.com> MIME-Version: 1.0 Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: The IMA interfaces ima_get_action() and ima_match_policy() call LSM functions that use lsmblobs. Change the IMA functions to pass the lsmblob to be compatible with the LSM functions. Reviewed-by: Kees Cook Reviewed-by: John Johansen Acked-by: Stephen Smalley Signed-off-by: Casey Schaufler cc: linux-integrity@vger.kernel.org --- security/integrity/ima/ima.h | 11 +++++---- security/integrity/ima/ima_api.c | 10 ++++---- security/integrity/ima/ima_appraise.c | 6 ++--- security/integrity/ima/ima_main.c | 35 +++++++++++---------------- security/integrity/ima/ima_policy.c | 14 +++++------ 5 files changed, 34 insertions(+), 42 deletions(-) diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index d7fe1d5ee8c9..81b00d07490f 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -252,9 +252,9 @@ static inline void ima_process_queued_keys(void) {} #endif /* CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS */ /* 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, - struct ima_template_desc **template_desc, +int ima_get_action(struct inode *inode, const struct cred *cred, + struct lsmblob *blob, int mask, enum ima_hooks func, + int *pcr, struct ima_template_desc **template_desc, const char *keyring); int ima_must_measure(struct inode *inode, int mask, enum ima_hooks func); int ima_collect_measurement(struct integrity_iint_cache *iint, @@ -280,8 +280,9 @@ 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 lsmblob *blob, enum ima_hooks func, int mask, + int flags, int *pcr, struct ima_template_desc **template_desc, const char *keyring); void ima_init_policy(void); diff --git a/security/integrity/ima/ima_api.c b/security/integrity/ima/ima_api.c index 4f39fb93f278..e83fa1c32843 100644 --- a/security/integrity/ima/ima_api.c +++ b/security/integrity/ima/ima_api.c @@ -164,7 +164,7 @@ void ima_add_violation(struct file *file, const unsigned char *filename, * ima_get_action - appraise & measure decision based on policy. * @inode: pointer to the inode associated with the object being validated * @cred: pointer to credentials structure to validate - * @secid: secid of the task being validated + * @blob: LSM data of the task being validated * @mask: contains the permission mask (MAY_READ, MAY_WRITE, MAY_EXEC, * MAY_APPEND) * @func: caller identifier @@ -183,16 +183,16 @@ 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, - struct ima_template_desc **template_desc, +int ima_get_action(struct inode *inode, const struct cred *cred, + struct lsmblob *blob, int mask, enum ima_hooks func, + int *pcr, struct ima_template_desc **template_desc, const char *keyring) { 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, blob, func, mask, flags, pcr, template_desc, keyring); } diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 8a198fc98ffb..9c22d5410b81 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -60,10 +60,8 @@ int ima_must_appraise(struct inode *inode, int mask, enum ima_hooks func) return 0; security_task_getsecid(current, &blob); - /* scaffolding the .secid[0] */ - return ima_match_policy(inode, current_cred(), blob.secid[0], func, - mask, IMA_APPRAISE | IMA_HASH, NULL, NULL, - NULL); + return ima_match_policy(inode, current_cred(), &blob, func, mask, + IMA_APPRAISE | IMA_HASH, NULL, NULL, NULL); } static int ima_fix_xattr(struct dentry *dentry, diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 97b26c425ac5..4031590b91a6 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -188,8 +188,8 @@ 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 lsmblob *blob, char *buf, loff_t size, + int mask, enum ima_hooks func) { struct inode *inode = file_inode(file); struct integrity_iint_cache *iint = NULL; @@ -212,7 +212,7 @@ 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, blob, mask, func, &pcr, &template_desc, NULL); violation_check = ((func == FILE_CHECK || func == MMAP_CHECK) && (ima_policy_flag & IMA_MEASURE)); @@ -386,8 +386,7 @@ int ima_file_mmap(struct file *file, unsigned long prot) if (file && (prot & PROT_EXEC)) { security_task_getsecid(current, &blob); - /* scaffolding - until process_measurement changes */ - return process_measurement(file, current_cred(), blob.secid[0], + return process_measurement(file, current_cred(), &blob, NULL, 0, MAY_EXEC, MMAP_CHECK); } @@ -426,8 +425,7 @@ int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot) security_task_getsecid(current, &blob); inode = file_inode(vma->vm_file); - /* scaffolding */ - action = ima_get_action(NULL, current_cred(), blob.secid[0], 0, + action = ima_get_action(NULL, current_cred(), &blob, 0, MMAP_CHECK, &pcr, &template, 0); /* Is the mmap'ed file in policy? */ @@ -466,16 +464,14 @@ int ima_bprm_check(struct linux_binprm *bprm) struct lsmblob blob; security_task_getsecid(current, &blob); - /* scaffolding until process_measurement changes */ - ret = process_measurement(bprm->file, current_cred(), blob.secid[0], - NULL, 0, MAY_EXEC, BPRM_CHECK); + ret = process_measurement(bprm->file, current_cred(), &blob, NULL, 0, + MAY_EXEC, BPRM_CHECK); if (ret) return ret; security_cred_getsecid(bprm->cred, &blob); - /* scaffolding until process_measurement changes */ - return process_measurement(bprm->file, bprm->cred, blob.secid[0], - NULL, 0, MAY_EXEC, CREDS_CHECK); + return process_measurement(bprm->file, bprm->cred, &blob, NULL, 0, + MAY_EXEC, CREDS_CHECK); } /** @@ -493,8 +489,7 @@ int ima_file_check(struct file *file, int mask) struct lsmblob blob; security_task_getsecid(current, &blob); - /* scaffolding until process_measurement changes */ - return process_measurement(file, current_cred(), blob.secid[0], NULL, 0, + return process_measurement(file, current_cred(), &blob, NULL, 0, mask & (MAY_READ | MAY_WRITE | MAY_EXEC | MAY_APPEND), FILE_CHECK); } @@ -675,9 +670,8 @@ int ima_post_read_file(struct file *file, void *buf, loff_t size, func = read_idmap[read_id] ?: FILE_CHECK; security_task_getsecid(current, &blob); - /* scaffolding until process_measurement changes */ - return process_measurement(file, current_cred(), blob.secid[0], buf, - size, MAY_READ, func); + return process_measurement(file, current_cred(), &blob, buf, size, + MAY_READ, func); } /** @@ -775,9 +769,8 @@ void process_buffer_measurement(struct inode *inode, const void *buf, int size, */ if (func) { security_task_getsecid(current, &blob); - /* scaffolding */ - action = ima_get_action(inode, current_cred(), blob.secid[0], - 0, func, &pcr, &template, keyring); + action = ima_get_action(inode, current_cred(), &blob, 0, func, + &pcr, &template, keyring); if (!(action & IMA_MEASURE)) return; } diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index a86b35dad4fa..b057c758b430 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -446,7 +446,7 @@ static bool ima_match_keyring(struct ima_rule_entry *rule, * @rule: a pointer to a rule * @inode: a pointer to an inode * @cred: a pointer to a credentials structure for user validation - * @secid: the secid of the task to be validated + * @blob: the lsm data of the task to be validated * @func: LIM hook identifier * @mask: requested action (MAY_READ | MAY_WRITE | MAY_APPEND | MAY_EXEC) * @keyring: keyring name to check in policy for KEY_CHECK func @@ -454,7 +454,7 @@ static bool ima_match_keyring(struct ima_rule_entry *rule, * 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 lsmblob *blob, enum ima_hooks func, int mask, const char *keyring) { @@ -519,7 +519,6 @@ 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: - lsmblob_init(&lsmdata, secid); rc = ima_filter_rule_match(&lsmdata, rule->lsm[i].type, Audit_equal, rule->lsm[i].rules); @@ -562,7 +561,7 @@ 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 + * @blob: 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 @@ -577,8 +576,9 @@ 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 lsmblob *blob, enum ima_hooks func, int mask, + int flags, int *pcr, struct ima_template_desc **template_desc, const char *keyring) { @@ -594,7 +594,7 @@ 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, blob, func, mask, keyring)) continue;