hwmon: (corsair-cpro) Validate the size of the received input buffer

Add buffer_recv_size to store the size of the received bytes.
Validate buffer_recv_size in send_usb_cmd().

Reported-by:  <syzbot+3bbbade4e1a7ab45ca3b@syzkaller.appspotmail.com>
Closes: https://lore.kernel.org/linux-hwmon/61233ba1-e5ad-4d7a-ba31-3b5d0adcffcc@roeck-us.net


Fixes: 40c3a445 ("hwmon: add Corsair Commander Pro driver")
Signed-off-by: Marius Zachmann <mail@mariuszachmann.de>
Link: https://lore.kernel.org/r/20250619132817.39764-5-mail@mariuszachmann.de


Signed-off-by: Guenter Roeck <linux@roeck-us.net>