[PATCH 1/3] ima_fs: One check less in ima_write_policy() after error detection

[SF Markus Elfring <elfring@users.sourceforge.net>]

From: Markus Elfring <elfring@users.sourceforge.net>
Date: Tue, 24 Jan 2017 20:30:55 +0100

Move the jump label directly before the desired assignment for the
variable "valid_policy" at the end so that the variable "result" will not
be checked once more after it was determined that a received input
parameter was not zero or a memory allocation failed.
Use the identifier "reset_validity" instead of the label "out".

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
---
 security/integrity/ima/ima_fs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index ca303e5d2b94..c1c8d34d111d 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -321,12 +321,12 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf,
 	/* No partial writes. */
 	result = -EINVAL;
 	if (*ppos != 0)
-		goto out;
+		goto reset_validity;
 
 	result = -ENOMEM;
 	data = kmalloc(datalen + 1, GFP_KERNEL);
 	if (!data)
-		goto out;
+		goto reset_validity;
 
 	*(data + datalen) = '\0';
 
@@ -353,8 +353,8 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf,
 	mutex_unlock(&ima_write_mutex);
 out_free:
 	kfree(data);
-out:
 	if (result < 0)
+reset_validity:
 		valid_policy = 0;
 
 	return result;
-- 
2.11.0