ecryptfs: use memdup_user()
Remove open-coded memdup_user().
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index a67fea6..dda3c58 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -418,18 +418,13 @@
if (count == 0)
goto out;
- data = kmalloc(count, GFP_KERNEL);
- if (!data) {
- printk(KERN_ERR "%s: Out of memory whilst attempting to "
- "kmalloc([%zd], GFP_KERNEL)\n", __func__, count);
+
+ data = memdup_user(buf, count);
+ if (IS_ERR(data)) {
+ printk(KERN_ERR "%s: memdup_user returned error [%ld]\n",
+ __func__, PTR_ERR(data));
goto out;
}
- rc = copy_from_user(data, buf, count);
- if (rc) {
- printk(KERN_ERR "%s: copy_from_user returned error [%d]\n",
- __func__, rc);
- goto out_free;
- }
sz = count;
i = 0;
switch (data[i++]) {