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From:   Chen Zhou <chenzhou10@huawei.com>
To:     <zohar@linux.ibm.com>, <dmitry.kasatkin@gmail.com>,
        <jmorris@namei.org>
CC:     <linux-integrity@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <chenzhou10@huawei.com>
Subject: [PATCH] ima: use kmemdup
Date:   Wed, 8 Jan 2020 19:25:13 +0800
Message-ID: <20200108112513.39715-1-chenzhou10@huawei.com>
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Sender: linux-kernel-owner@vger.kernel.org
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Fix memdup.cocci warnings:
./security/integrity/ima/ima_policy.c:268:10-17: WARNING opportunity for kmemdup

Use kmemdup rather than duplicating its implementation.

Signed-off-by: Chen Zhou <chenzhou10@huawei.com>
---
 security/integrity/ima/ima_policy.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index ef8dfd4..e31649c 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -265,7 +265,7 @@ static struct ima_rule_entry *ima_lsm_copy_rule(struct ima_rule_entry *entry)
 	struct ima_rule_entry *nentry;
 	int i, result;
 
-	nentry = kmalloc(sizeof(*nentry), GFP_KERNEL);
+	nentry = kmemdup(entry, sizeof(*nentry), GFP_KERNEL);
 	if (!nentry)
 		return NULL;
 
@@ -273,7 +273,6 @@ static struct ima_rule_entry *ima_lsm_copy_rule(struct ima_rule_entry *entry)
 	 * Immutable elements are copied over as pointers and data; only
 	 * lsm rules can change
 	 */
-	memcpy(nentry, entry, sizeof(*nentry));
 	memset(nentry->lsm, 0, sizeof_field(struct ima_rule_entry, lsm));
 
 	for (i = 0; i < MAX_LSM_RULES; i++) {
-- 
2.7.4