IR/lirc: use memdup_user instead of copy_from_user
Commit Message
Inspired by 64047b94ede76e0c72ba8af98505e96d6a664519
Signed-off-by: Jarod Wilson <jarod@redhat.com>
---
drivers/media/IR/ir-lirc-codec.c | 11 +++--------
1 files changed, 3 insertions(+), 8 deletions(-)
@@ -74,14 +74,9 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char *buf,
if (count > LIRCBUF_SIZE || count % 2 == 0)
return -EINVAL;
- txbuf = kzalloc(sizeof(int) * LIRCBUF_SIZE, GFP_KERNEL);
- if (!txbuf)
- return -ENOMEM;
-
- if (copy_from_user(txbuf, buf, n)) {
- ret = -EFAULT;
- goto out;
- }
+ txbuf = memdup_user(buf, n);
+ if (IS_ERR(txbuf))
+ return PTR_ERR(txbuf);
ir_dev = lirc->ir_dev;
if (!ir_dev) {