From patchwork Tue Nov 30 16:06:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 12647699 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 5505AC433FE for ; Tue, 30 Nov 2021 16:08:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243708AbhK3QL2 (ORCPT ); Tue, 30 Nov 2021 11:11:28 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:20054 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243464AbhK3QLA (ORCPT ); Tue, 30 Nov 2021 11:11:00 -0500 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1AUFkTrA019625; Tue, 30 Nov 2021 16:07:20 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=sdx2ghYnAySCVdipD9SeJ9FQ4PSdwB9xcnyBgKS1RQg=; b=b2jzwkoax/NlfDsFt8M+s9kSdjUdKT/bzRAmJ1X/MTcnxl+S3Ol3uQFE16Q2utJgKO+z G8bieucN4+e0IZq2lvylEff+1MGDYpoFgt9sLxvhba8g4h0PgPxvS4V7iwqihd7YA7fw c1E1gEshX+NyENNJyxwH43z1QrDaZ8cxsDzUeRTti6Tbxibow8ywnD+sEYPM4vYEZyWM geOBwG5tuZATlW951yMbagD/FVlr+CZ9U8fBWE+C6IRZC4jh+ZedC5GTbkCR+KLHnVM8 SvYlw1w4E010Zs3UsftjI8ks9xnFP8vv1eKz11DG2zH/M/VvrYMV8udN5Yp+HW12KOYS MA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3cnpw4ghx1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 30 Nov 2021 16:07:20 +0000 Received: from m0098396.ppops.net (m0098396.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 1AUFlKQ2025596; Tue, 30 Nov 2021 16:07:19 GMT Received: from ppma01dal.us.ibm.com (83.d6.3fa9.ip4.static.sl-reverse.com [169.63.214.131]) by mx0a-001b2d01.pphosted.com with ESMTP id 3cnpw4ghw1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 30 Nov 2021 16:07:19 +0000 Received: from pps.filterd (ppma01dal.us.ibm.com [127.0.0.1]) by ppma01dal.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 1AUG3aah031982; Tue, 30 Nov 2021 16:07:17 GMT Received: from b01cxnp23034.gho.pok.ibm.com (b01cxnp23034.gho.pok.ibm.com [9.57.198.29]) by ppma01dal.us.ibm.com with ESMTP id 3ckcabr03r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 30 Nov 2021 16:07:17 +0000 Received: from b01ledav003.gho.pok.ibm.com (b01ledav003.gho.pok.ibm.com [9.57.199.108]) by b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 1AUG7B5Z50921840 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 30 Nov 2021 16:07:11 GMT Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5741DB205F; Tue, 30 Nov 2021 16:07:11 +0000 (GMT) Received: from b01ledav003.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3E75EB2089; Tue, 30 Nov 2021 16:07:11 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b01ledav003.gho.pok.ibm.com (Postfix) with ESMTP; Tue, 30 Nov 2021 16:07:11 +0000 (GMT) From: Stefan Berger To: linux-integrity@vger.kernel.org Cc: zohar@linux.ibm.com, serge@hallyn.com, christian.brauner@ubuntu.com, containers@lists.linux.dev, dmitry.kasatkin@gmail.com, ebiederm@xmission.com, krzysztof.struczynski@huawei.com, roberto.sassu@huawei.com, mpeters@redhat.com, lhinds@redhat.com, lsturman@redhat.com, puiterwi@redhat.com, jejb@linux.ibm.com, jamjoom@us.ibm.com, linux-kernel@vger.kernel.org, paul@paul-moore.com, rgb@redhat.com, linux-security-module@vger.kernel.org, jmorris@namei.org, Stefan Berger Subject: [RFC 05/20] ima: Move IMA's keys queue related variables into ima_namespace Date: Tue, 30 Nov 2021 11:06:39 -0500 Message-Id: <20211130160654.1418231-6-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211130160654.1418231-1-stefanb@linux.ibm.com> References: <20211130160654.1418231-1-stefanb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: aM3h58fkw26NaYqI84b0aLqHP-FBVxuC X-Proofpoint-ORIG-GUID: WgmfUvO_AqdjuaP4Z3IG3HkDZ5iYw32D X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.0.607.475 definitions=2021-11-30_09,2021-11-28_01,2020-04-07_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 bulkscore=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 malwarescore=0 phishscore=0 adultscore=0 impostorscore=0 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2111300084 Precedence: bulk List-ID: Move variables from keys queue into ima_namespace. Some variables have to be initialized before ima_init() runs, so statically initialize them for the init_ima_ns. Since only init_ima_ns uses the queued keys there's no need to free the list of queued keys when tearing down IMA namespaces. Signed-off-by: Stefan Berger --- include/linux/ima.h | 11 ++++++ security/integrity/ima/ima.h | 9 ++--- security/integrity/ima/ima_asymmetric_keys.c | 5 +-- security/integrity/ima/ima_init_ima_ns.c | 5 +++ security/integrity/ima/ima_ns.c | 6 ++++ security/integrity/ima/ima_queue_keys.c | 37 +++++++------------- 6 files changed, 43 insertions(+), 30 deletions(-) diff --git a/include/linux/ima.h b/include/linux/ima.h index 4b5dada581e4..977df9155cde 100644 --- a/include/linux/ima.h +++ b/include/linux/ima.h @@ -219,6 +219,17 @@ struct ima_namespace { struct kmem_cache *ns_status_cache; #ifdef CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS + /* + * Flag to indicate whether a key can be processed + * right away or should be queued for processing later. + */ + bool ima_process_keys; + + /* + * To synchronize access to the list of keys that need to be measured + */ + struct mutex ima_keys_lock; + struct list_head ima_keys; /* * If custom IMA policy is not loaded then keys queued up * for measurement should be freed. This worker is used diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 9edab9050dc7..97eb03376855 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -250,14 +250,15 @@ struct ima_key_entry { char *keyring_name; }; void ima_init_key_queue(struct ima_namespace *ns); -bool ima_should_queue_key(void); -bool ima_queue_key(struct key *keyring, const void *payload, +bool ima_should_queue_key(struct ima_namespace *ns); +bool ima_queue_key(struct ima_namespace *ns, struct key *keyring, const void *payload, size_t payload_len); void ima_process_queued_keys(struct ima_namespace *ns); void ima_keys_handler(struct work_struct *work); #else -static inline bool ima_should_queue_key(void) { return false; } -static inline bool ima_queue_key(struct key *keyring, +static inline bool ima_should_queue_key(struct ima_namespace *ns) { return false; } +static inline bool ima_queue_key(struct ima_namespace *ns, + struct key *keyring, const void *payload, size_t payload_len) { return false; } static inline void ima_process_queued_keys(struct ima_namespace *ns) {} diff --git a/security/integrity/ima/ima_asymmetric_keys.c b/security/integrity/ima/ima_asymmetric_keys.c index f6aa0b47a772..b20e82eda8f4 100644 --- a/security/integrity/ima/ima_asymmetric_keys.c +++ b/security/integrity/ima/ima_asymmetric_keys.c @@ -30,6 +30,7 @@ void ima_post_key_create_or_update(struct key *keyring, struct key *key, const void *payload, size_t payload_len, unsigned long flags, bool create) { + struct ima_namespace *ns = get_current_ns(); bool queued = false; /* Only asymmetric keys are handled by this hook. */ @@ -39,8 +40,8 @@ void ima_post_key_create_or_update(struct key *keyring, struct key *key, if (!payload || (payload_len == 0)) return; - if (ima_should_queue_key()) - queued = ima_queue_key(keyring, payload, payload_len); + if (ima_should_queue_key(ns)) + queued = ima_queue_key(ns, keyring, payload, payload_len); if (queued) return; diff --git a/security/integrity/ima/ima_init_ima_ns.c b/security/integrity/ima/ima_init_ima_ns.c index 3bc2d3611739..7b66fe598789 100644 --- a/security/integrity/ima/ima_init_ima_ns.c +++ b/security/integrity/ima/ima_init_ima_ns.c @@ -45,5 +45,10 @@ int __init ima_ns_init(void) struct ima_namespace init_ima_ns = { .kref = KREF_INIT(1), .user_ns = &init_user_ns, +#ifdef CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS + .ima_process_keys = false, + .ima_keys_lock = __MUTEX_INITIALIZER(init_ima_ns.ima_keys_lock), + .ima_keys = LIST_HEAD_INIT(init_ima_ns.ima_keys), +#endif }; EXPORT_SYMBOL(init_ima_ns); diff --git a/security/integrity/ima/ima_ns.c b/security/integrity/ima/ima_ns.c index 1c23dc1b8100..4de4a93bc009 100644 --- a/security/integrity/ima/ima_ns.c +++ b/security/integrity/ima/ima_ns.c @@ -38,6 +38,12 @@ static struct ima_namespace *create_ima_ns(struct user_namespace *user_ns) if (err) goto fail_free; +#ifdef CONFIG_IMA_QUEUE_EARLY_BOOT_KEYS + ns->ima_process_keys = false; + mutex_init(&ns->ima_keys_lock); + INIT_LIST_HEAD(&ns->ima_keys); +#endif + return ns; fail_free: diff --git a/security/integrity/ima/ima_queue_keys.c b/security/integrity/ima/ima_queue_keys.c index fcaa1645dba3..9e5e9a178253 100644 --- a/security/integrity/ima/ima_queue_keys.c +++ b/security/integrity/ima/ima_queue_keys.c @@ -14,17 +14,6 @@ #include #include "ima.h" -/* - * Flag to indicate whether a key can be processed - * right away or should be queued for processing later. - */ -static bool ima_process_keys; - -/* - * To synchronize access to the list of keys that need to be measured - */ -static DEFINE_MUTEX(ima_keys_lock); -static LIST_HEAD(ima_keys); /* * This worker function frees keys that may still be @@ -95,7 +84,7 @@ static struct ima_key_entry *ima_alloc_key_entry(struct key *keyring, return entry; } -bool ima_queue_key(struct key *keyring, const void *payload, +bool ima_queue_key(struct ima_namespace *ns, struct key *keyring, const void *payload, size_t payload_len) { bool queued = false; @@ -105,12 +94,12 @@ bool ima_queue_key(struct key *keyring, const void *payload, if (!entry) return false; - mutex_lock(&ima_keys_lock); - if (!ima_process_keys) { - list_add_tail(&entry->list, &ima_keys); + mutex_lock(&ns->ima_keys_lock); + if (!ns->ima_process_keys) { + list_add_tail(&entry->list, &ns->ima_keys); queued = true; } - mutex_unlock(&ima_keys_lock); + mutex_unlock(&ns->ima_keys_lock); if (!queued) ima_free_key_entry(entry); @@ -129,7 +118,7 @@ void ima_process_queued_keys(struct ima_namespace *ns) struct ima_key_entry *entry, *tmp; bool process = false; - if (ima_process_keys) + if (ns->ima_process_keys) return; /* @@ -138,12 +127,12 @@ void ima_process_queued_keys(struct ima_namespace *ns) * First one setting the ima_process_keys flag to true will * process the queued keys. */ - mutex_lock(&ima_keys_lock); - if (!ima_process_keys) { - ima_process_keys = true; + mutex_lock(&ns->ima_keys_lock); + if (!ns->ima_process_keys) { + ns->ima_process_keys = true; process = true; } - mutex_unlock(&ima_keys_lock); + mutex_unlock(&ns->ima_keys_lock); if (!process) return; @@ -151,7 +140,7 @@ void ima_process_queued_keys(struct ima_namespace *ns) if (!ns->timer_expired) cancel_delayed_work_sync(&ns->ima_keys_delayed_work); - list_for_each_entry_safe(entry, tmp, &ima_keys, list) { + list_for_each_entry_safe(entry, tmp, &ns->ima_keys, list) { if (!ns->timer_expired) process_buffer_measurement(&init_user_ns, NULL, entry->payload, @@ -165,7 +154,7 @@ void ima_process_queued_keys(struct ima_namespace *ns) } } -inline bool ima_should_queue_key(void) +inline bool ima_should_queue_key(struct ima_namespace *ns) { - return !ima_process_keys; + return !ns->ima_process_keys; }