linux-kernel - [PATCH 1/1] ima: remove unnecessary i

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Date:	Wed, 11 Jun 2014 20:51:37 +0300
From:	Dmitry Kasatkin <d.kasatkin@...sung.com>
To:	zohar@...ux.vnet.ibm.com, linux-security-module@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, dmitry.kasatkin@...il.com,
	Dmitry Kasatkin <d.kasatkin@...sung.com>
Subject: [PATCH 1/1] ima: remove unnecessary i_mutex locking

I think i_mutex locking is absolutely unnecessary here.
It is uselessly taken here even when IMA policy is empty and
IMA is effectively disabled.

Signed-off-by: Dmitry Kasatkin <d.kasatkin@...sung.com>
---
 security/integrity/ima/ima_main.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 09baa33..cf1c369 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -88,8 +88,6 @@ static void ima_rdwr_violation_check(struct file *file)
 	if (!S_ISREG(inode->i_mode) || !ima_initialized)
 		return;
 
-	mutex_lock(&inode->i_mutex);	/* file metadata: permissions, xattr */
-
 	if (mode & FMODE_WRITE) {
 		if (atomic_read(&inode->i_readcount) && IS_IMA(inode)) {
 			struct integrity_iint_cache *iint;
@@ -104,8 +102,6 @@ static void ima_rdwr_violation_check(struct file *file)
 			send_writers = true;
 	}
 
-	mutex_unlock(&inode->i_mutex);
-
 	if (!send_tomtou && !send_writers)
 		return;
 
-- 
1.9.1

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