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authorGeliang Tang <geliangtang@gmail.com>2017-05-06 23:40:18 +0800
committerMimi Zohar <zohar@linux.vnet.ibm.com>2017-06-21 14:37:12 -0400
commitb4e280304ddb2fb5b6970524e901fc8ae8ec6337 (patch)
tree14f5444897b285b272ce18e8573f5f908e6b6683 /security/integrity
parent5d659f286d58d76064168c4cd7aad61a30d20c44 (diff)
ima: use memdup_user_nul
Use memdup_user_nul() helper instead of open-coding to simplify the code. Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Diffstat (limited to 'security/integrity')
-rw-r--r--security/integrity/ima/ima_fs.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index ca303e5d2b94..ad491c51e833 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -323,16 +323,11 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf,
if (*ppos != 0)
goto out;
- result = -ENOMEM;
- data = kmalloc(datalen + 1, GFP_KERNEL);
- if (!data)
+ data = memdup_user_nul(buf, datalen);
+ if (IS_ERR(data)) {
+ result = PTR_ERR(data);
goto out;
-
- *(data + datalen) = '\0';
-
- result = -EFAULT;
- if (copy_from_user(data, buf, datalen))
- goto out_free;
+ }
result = mutex_lock_interruptible(&ima_write_mutex);
if (result < 0)