From patchwork Wed Dec 8 22:18:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 12665347 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 10502C43219 for ; Wed, 8 Dec 2021 22:18:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240695AbhLHWWS (ORCPT ); Wed, 8 Dec 2021 17:22:18 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:47300 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240627AbhLHWWM (ORCPT ); Wed, 8 Dec 2021 17:22:12 -0500 Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1B8KXah2017412; Wed, 8 Dec 2021 22:18:27 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=xyy/62S2WuL5SQas3SuJCQFiQYhPgxAGgROqP3TXoiY=; b=LUaWjD8Fmg8Te1nn7NDbLTxX7fxQ3Q55cHCYReI8DKyydSonV8Axa3CHnwjTb381g3nU cLHm7C5jW4WvgkNlppdK7Tf0VVeQ66Gn6aptLvOaPE7vrCsR4m6o8otl3GB3vbdw2ydb pY7kUxyJeOStC+tnw+Zuo7H0KtgjAwS/z3XYUndCo+y7GI4K0IYXuwe+O4Dpc91OB/KW ATKHxA+wh2atEx97kD0Ve7bGYvo/0nb6xH30jeIJAVa53x86e7O9pazpatdxnu+DvuUP /v+4ukrXWq/7UbOoWIQUOQ95vZs9is0zqEQqNbel38ffeyEzSAhugx2TAG8LmEFAo/US AQ== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 3cu10a4yq5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 08 Dec 2021 22:18:27 +0000 Received: from m0127361.ppops.net (m0127361.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 1B8MHWh5037590; Wed, 8 Dec 2021 22:18:26 GMT Received: from ppma04dal.us.ibm.com (7a.29.35a9.ip4.static.sl-reverse.com [169.53.41.122]) by mx0a-001b2d01.pphosted.com with ESMTP id 3cu10a4yq1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 08 Dec 2021 22:18:26 +0000 Received: from pps.filterd (ppma04dal.us.ibm.com [127.0.0.1]) by ppma04dal.us.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 1B8MC6UP003558; Wed, 8 Dec 2021 22:18:25 GMT Received: from b01cxnp22035.gho.pok.ibm.com (b01cxnp22035.gho.pok.ibm.com [9.57.198.25]) by ppma04dal.us.ibm.com with ESMTP id 3cqyybqh1d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 08 Dec 2021 22:18:25 +0000 Received: from b01ledav001.gho.pok.ibm.com (b01ledav001.gho.pok.ibm.com [9.57.199.106]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 1B8MIO3p23527882 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 8 Dec 2021 22:18:24 GMT Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 390652805C; Wed, 8 Dec 2021 22:18:24 +0000 (GMT) Received: from b01ledav001.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1908F28060; Wed, 8 Dec 2021 22:18:24 +0000 (GMT) Received: from sbct-3.pok.ibm.com (unknown [9.47.158.153]) by b01ledav001.gho.pok.ibm.com (Postfix) with ESMTP; Wed, 8 Dec 2021 22:18:24 +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: [PATCH v5 05/16] ima: Move IMA's keys queue related variables into ima_namespace Date: Wed, 8 Dec 2021 17:18:07 -0500 Message-Id: <20211208221818.1519628-6-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211208221818.1519628-1-stefanb@linux.ibm.com> References: <20211208221818.1519628-1-stefanb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: lFffXfttmj3Ne1obf2MRAaaaMfy0V3v3 X-Proofpoint-ORIG-GUID: P3VHKaT4FVONWNJVSHZzqjNHKa6ym2pg X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2021-12-08_08,2021-12-08_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 malwarescore=0 lowpriorityscore=0 phishscore=0 impostorscore=0 clxscore=1015 suspectscore=0 spamscore=0 mlxlogscore=999 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112080121 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 529defe4d272..0ce58c17cb25 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 75ef17d52b5b..144b30ceefb0 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 000dbde2f264..1ee724bab714 100644 --- a/security/integrity/ima/ima_ns.c +++ b/security/integrity/ima/ima_ns.c @@ -38,6 +38,12 @@ int 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 + user_ns->ima_ns = ns; return 0; diff --git a/security/integrity/ima/ima_queue_keys.c b/security/integrity/ima/ima_queue_keys.c index ed5923dfe71b..4c69178b1ffe 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 @@ -100,7 +89,7 @@ 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; @@ -110,12 +99,12 @@ 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); @@ -134,7 +123,7 @@ 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; /* @@ -143,12 +132,12 @@ 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; @@ -159,7 +148,7 @@ void ima_process_queued_keys(struct ima_namespace *ns) put_user_ns(ns->user_ns); } - 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, @@ -173,7 +162,7 @@ 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; }