Bluetooth: Use memdup_user in le_auto_conn_write()

This patch does a small code simplification replacing the tipical
kmalloc-copy_from_user sequence by memdup_user() helper.

Cc: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 3 insertions, 8 deletions

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 1c6ffaa8902f..bfc6f810554e 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -955,14 +955,9 @@ static ssize_t le_auto_conn_write(struct file *file, const char __user *data,
         if (count < 3)
                 return -EINVAL;
 
-        buf = kzalloc(count, GFP_KERNEL);
-        if (!buf)
-                return -ENOMEM;
-
-        if (copy_from_user(buf, data, count)) {
-                err = -EFAULT;
-                goto done;
-        }
+        buf = memdup_user(data, count);
+        if (IS_ERR(buf))
+                return PTR_ERR(buf);
 
         if (memcmp(buf, "add", 3) == 0) {
                 n = sscanf(&buf[4], "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx %hhu %hhu",