From: Stefan Berger <stefanb@linux.ibm.com>
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 <stefanb@linux.ibm.com>
Subject: [PATCH v6 16/17] ima: Move dentry into ima_namespace and others onto stack
Date: Fri, 10 Dec 2021 14:47:35 -0500 [thread overview]
Message-ID: <20211210194736.1538863-17-stefanb@linux.ibm.com> (raw)
In-Reply-To: <20211210194736.1538863-1-stefanb@linux.ibm.com>
Move the policy file dentry into the ima_namespace for reuse by
virtualized SecurityFS and for being able to remove it from
the filesystem. Move the other dentries onto the stack.
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
---
include/linux/ima.h | 2 ++
security/integrity/ima/ima_fs.c | 33 +++++++++++++++++++--------------
2 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/include/linux/ima.h b/include/linux/ima.h
index ca300306a715..cc950ccbf157 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -273,6 +273,8 @@ struct ima_namespace {
struct mutex ima_write_mutex;
unsigned long ima_fs_flags;
int valid_policy;
+
+ struct dentry *policy_dentry;
};
extern struct ima_namespace init_ima_ns;
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index 090ee85bfa3a..84b3bf2f1454 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -405,14 +405,6 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf,
return result;
}
-static struct dentry *ima_dir;
-static struct dentry *ima_symlink;
-static struct dentry *binary_runtime_measurements;
-static struct dentry *ascii_runtime_measurements;
-static struct dentry *runtime_measurements_count;
-static struct dentry *violations;
-static struct dentry *ima_policy;
-
enum ima_fs_flags {
IMA_FS_BUSY,
};
@@ -485,8 +477,8 @@ static int ima_release_policy(struct inode *inode, struct file *file)
ima_update_policy(ns);
#if !defined(CONFIG_IMA_WRITE_POLICY) && !defined(CONFIG_IMA_READ_POLICY)
- securityfs_remove(ima_policy);
- ima_policy = NULL;
+ securityfs_remove(ns->policy_dentry);
+ ns->policy_dentry = NULL;
#elif defined(CONFIG_IMA_WRITE_POLICY)
clear_bit(IMA_FS_BUSY, &ns->ima_fs_flags);
#elif defined(CONFIG_IMA_READ_POLICY)
@@ -503,8 +495,16 @@ static const struct file_operations ima_measure_policy_ops = {
.llseek = generic_file_llseek,
};
-int __init ima_fs_init(void)
+static int __init ima_fs_ns_init(struct user_namespace *user_ns)
{
+ struct ima_namespace *ns = user_ns->ima_ns;
+ struct dentry *ima_dir;
+ struct dentry *ima_symlink = NULL;
+ struct dentry *binary_runtime_measurements = NULL;
+ struct dentry *ascii_runtime_measurements = NULL;
+ struct dentry *runtime_measurements_count = NULL;
+ struct dentry *violations = NULL;
+
ima_dir = securityfs_create_dir("ima", integrity_dir);
if (IS_ERR(ima_dir))
return -1;
@@ -541,20 +541,25 @@ int __init ima_fs_init(void)
if (IS_ERR(violations))
goto out;
- ima_policy = securityfs_create_file("policy", POLICY_FILE_FLAGS,
+ ns->policy_dentry = securityfs_create_file("policy", POLICY_FILE_FLAGS,
ima_dir, NULL,
&ima_measure_policy_ops);
- if (IS_ERR(ima_policy))
+ if (IS_ERR(ns->policy_dentry))
goto out;
return 0;
out:
+ securityfs_remove(ns->policy_dentry);
securityfs_remove(violations);
securityfs_remove(runtime_measurements_count);
securityfs_remove(ascii_runtime_measurements);
securityfs_remove(binary_runtime_measurements);
securityfs_remove(ima_symlink);
securityfs_remove(ima_dir);
- securityfs_remove(ima_policy);
return -1;
}
+
+int __init ima_fs_init(void)
+{
+ return ima_fs_ns_init(&init_user_ns);
+}
--
2.31.1
next prev parent reply other threads:[~2021-12-10 19:48 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-10 19:47 [PATCH v6 00/17] ima: Namespace IMA with audit support in IMA-ns Stefan Berger
2021-12-10 19:47 ` [PATCH v6 01/17] ima: Add IMA namespace support Stefan Berger
2021-12-13 21:11 ` Stefan Berger
2021-12-15 19:41 ` Mimi Zohar
2021-12-15 21:10 ` Mimi Zohar
2021-12-16 2:34 ` Stefan Berger
2021-12-10 19:47 ` [PATCH v6 02/17] ima: Define ns_status for storing namespaced iint data Stefan Berger
2021-12-15 21:12 ` Mimi Zohar
2021-12-16 2:37 ` Stefan Berger
2021-12-16 3:53 ` Mimi Zohar
2021-12-16 4:00 ` Stefan Berger
2021-12-10 19:47 ` [PATCH v6 03/17] ima: Namespace audit status flags Stefan Berger
2021-12-15 21:15 ` Mimi Zohar
2021-12-16 2:38 ` Stefan Berger
2021-12-16 3:54 ` Mimi Zohar
2021-12-10 19:47 ` [PATCH v6 04/17] ima: Move delayed work queue and variables into ima_namespace Stefan Berger
2021-12-10 19:47 ` [PATCH v6 05/17] ima: Move IMA's keys queue related " Stefan Berger
2021-12-10 19:47 ` [PATCH v6 06/17] ima: Move policy " Stefan Berger
2021-12-13 21:15 ` Stefan Berger
2021-12-10 19:47 ` [PATCH v6 07/17] ima: Move ima_htable " Stefan Berger
2021-12-10 19:47 ` [PATCH v6 08/17] ima: Move measurement list related variables " Stefan Berger
2021-12-10 19:47 ` [PATCH v6 09/17] ima: Only accept AUDIT rules for IMA non-init_ima_ns namespaces for now Stefan Berger
2021-12-10 19:47 ` [PATCH v6 10/17] ima: Implement hierarchical processing of file accesses Stefan Berger
2021-12-10 19:47 ` [PATCH v6 11/17] securityfs: Only use simple_pin_fs/simple_release_fs for init_user_ns Stefan Berger
2021-12-10 19:47 ` [PATCH v6 12/17] securityfs: Extend securityfs with namespacing support Stefan Berger
2021-12-11 10:50 ` Christian Brauner
2021-12-11 22:31 ` Stefan Berger
2021-12-10 19:47 ` [PATCH v6 13/17] ima: Move some IMA policy and filesystem related variables into ima_namespace Stefan Berger
2021-12-10 19:47 ` [PATCH v6 14/17] ima: Tie opened SecurityFS files to the IMA namespace it belongs to Stefan Berger
2021-12-11 11:00 ` Christian Brauner
2021-12-11 22:33 ` Stefan Berger
2021-12-10 19:47 ` [PATCH v6 15/17] ima: Use mac_admin_ns_capable() to check corresponding capability Stefan Berger
2021-12-11 15:29 ` Serge E. Hallyn
2021-12-11 16:05 ` James Bottomley
2021-12-11 19:22 ` Serge E. Hallyn
2021-12-11 20:12 ` James Bottomley
2021-12-10 19:47 ` Stefan Berger [this message]
2021-12-10 19:47 ` [PATCH v6 17/17] ima: Setup securityfs for IMA namespace Stefan Berger
2021-12-15 21:31 ` Mimi Zohar
2021-12-16 2:41 ` Stefan Berger
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