linux-kernel - [PATCH] integrity: iint: Optimize integrity_iintcache_init and integrity_inode

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Date:   Tue, 18 Oct 2022 15:26:11 +0800
From:   Li zeming <zeming@...china.com>
To:     zohar@...ux.ibm.com, dmitry.kasatkin@...il.com,
        paul@...l-moore.com, jmorris@...ei.org, serge@...lyn.com
Cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, Li zeming <zeming@...china.com>
Subject: [PATCH] integrity: iint: Optimize integrity_iintcache_init and integrity_inode_free function

These functions are optimized as follows.
1. Remove void * variable foo cast type.
2. iint_cache Added memory allocation check.

Signed-off-by: Li zeming <zeming@...china.com>
---
 security/integrity/iint.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/security/integrity/iint.c b/security/integrity/iint.c
index 8638976f7990..7c902b92482e 100644
--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -160,7 +160,7 @@ void integrity_inode_free(struct inode *inode)
 
 static void init_once(void *foo)
 {
-	struct integrity_iint_cache *iint = (struct integrity_iint_cache *) foo;
+	struct integrity_iint_cache *iint = foo;
 
 	memset(iint, 0, sizeof(*iint));
 	iint->ima_file_status = INTEGRITY_UNKNOWN;
@@ -177,6 +177,9 @@ static int __init integrity_iintcache_init(void)
 	iint_cache =
 	    kmem_cache_create("iint_cache", sizeof(struct integrity_iint_cache),
 			      0, SLAB_PANIC, init_once);
+	if (!iint_cache)
+		return -ENOMEM;
+
 	return 0;
 }
 DEFINE_LSM(integrity) = {
-- 
2.18.2