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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>
This commit is contained in:
Geliang Tang 2017-05-06 23:40:18 +08:00 committed by Mimi Zohar
parent 5d659f286d
commit b4e280304d
1 changed files with 4 additions and 9 deletions
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13
security/integrity/ima/ima_fs.c
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@ -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)