[PATCH v10 03/27] ima: Return error code obtained from securityfs functions

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 v10 03/27] ima: Return error code obtained from securityfs functions
Date: Tue,  1 Feb 2022 15:37:11 -0500	[thread overview]
Message-ID: <20220201203735.164593-4-stefanb@linux.ibm.com> (raw)
In-Reply-To: <20220201203735.164593-1-stefanb@linux.ibm.com>

If an error occurs when creating a securityfs file, return the exact
error code to the caller.

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
---
 security/integrity/ima/ima_fs.c | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index 3ad8f7734208..cd1683dad3bf 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -452,47 +452,61 @@ static const struct file_operations ima_measure_policy_ops = {
 
 int __init ima_fs_init(void)
 {
+	int ret;
+
 	ima_dir = securityfs_create_dir("ima", integrity_dir);
 	if (IS_ERR(ima_dir))
-		return -1;
+		return PTR_ERR(ima_dir);
 
 	ima_symlink = securityfs_create_symlink("ima", NULL, "integrity/ima",
 						NULL);
-	if (IS_ERR(ima_symlink))
+	if (IS_ERR(ima_symlink)) {
+		ret = PTR_ERR(ima_symlink);
 		goto out;
+	}
 
 	binary_runtime_measurements =
 	    securityfs_create_file("binary_runtime_measurements",
 				   S_IRUSR | S_IRGRP, ima_dir, NULL,
 				   &ima_measurements_ops);
-	if (IS_ERR(binary_runtime_measurements))
+	if (IS_ERR(binary_runtime_measurements)) {
+		ret = PTR_ERR(binary_runtime_measurements);
 		goto out;
+	}
 
 	ascii_runtime_measurements =
 	    securityfs_create_file("ascii_runtime_measurements",
 				   S_IRUSR | S_IRGRP, ima_dir, NULL,
 				   &ima_ascii_measurements_ops);
-	if (IS_ERR(ascii_runtime_measurements))
+	if (IS_ERR(ascii_runtime_measurements)) {
+		ret = PTR_ERR(ascii_runtime_measurements);
 		goto out;
+	}
 
 	runtime_measurements_count =
 	    securityfs_create_file("runtime_measurements_count",
 				   S_IRUSR | S_IRGRP, ima_dir, NULL,
 				   &ima_measurements_count_ops);
-	if (IS_ERR(runtime_measurements_count))
+	if (IS_ERR(runtime_measurements_count)) {
+		ret = PTR_ERR(runtime_measurements_count);
 		goto out;
+	}
 
 	violations =
 	    securityfs_create_file("violations", S_IRUSR | S_IRGRP,
 				   ima_dir, NULL, &ima_htable_violations_ops);
-	if (IS_ERR(violations))
+	if (IS_ERR(violations)) {
+		ret = PTR_ERR(violations);
 		goto out;
+	}
 
 	ima_policy = securityfs_create_file("policy", POLICY_FILE_FLAGS,
 					    ima_dir, NULL,
 					    &ima_measure_policy_ops);
-	if (IS_ERR(ima_policy))
+	if (IS_ERR(ima_policy)) {
+		ret = PTR_ERR(ima_policy);
 		goto out;
+	}
 
 	return 0;
 out:
@@ -503,5 +517,6 @@ int __init ima_fs_init(void)
 	securityfs_remove(binary_runtime_measurements);
 	securityfs_remove(ima_symlink);
 	securityfs_remove(ima_dir);
-	return -1;
+
+	return ret;
 }
-- 
2.31.1

