linux-kernel - [PATCH] integrity: add error handling for kmem_cache

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Date:   Tue, 12 Jun 2018 12:27:03 +0800
From:   Zhouyang Jia <jiazhouyang09@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Zhouyang Jia <jiazhouyang09@...il.com>,
        James Morris <jmorris@...ei.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Matthew Garrett <mjg59@...gle.com>,
        Jeff Layton <jlayton@...hat.com>,
        Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] integrity: add error handling for kmem_cache_create

When kmem_cache_create fails, the lack of error-handling code may
cause unexpected results.

This patch adds error-handling code after calling kmem_cache_create.

Signed-off-by: Zhouyang Jia <jiazhouyang09@...il.com>
---
 security/integrity/iint.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/security/integrity/iint.c b/security/integrity/iint.c
index 149faa8..c074fd8 100644
--- a/security/integrity/iint.c
+++ b/security/integrity/iint.c
@@ -172,6 +172,9 @@ 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;
 }
 security_initcall(integrity_iintcache_init);
-- 
2.7.4