Commit 37b9dd0d authored by Andrey Konovalov's avatar Andrey Konovalov Committed by Greg Kroah-Hartman
Browse files

usb: raw-gadget: do not limit transfer length 



Drop the check on the maximum transfer length in Raw Gadget for both
control and non-control transfers.

Limiting the transfer length causes a problem with emulating USB devices
whose full configuration descriptor exceeds PAGE_SIZE in length.

Overall, there does not appear to be any reason to enforce any kind of
transfer length limit on the Raw Gadget side for either control or
non-control transfers, so let's just drop the related check.

Cc: stable <stable@kernel.org>
Fixes: f2c2e717 ("usb: gadget: add raw-gadget interface")
Signed-off-by: default avatarAndrey Konovalov <andreyknvl@gmail.com>
Link: https://patch.msgid.link/a6024e8eab679043e9b8a5defdb41c4bda62f02b.1761085528.git.andreyknvl@gmail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2bbd38fc

drivers/usb/gadget/legacy/raw_gadget.c

+0 −2
Original line number Diff line number Diff line
@@ -667,8 +667,6 @@ static void *raw_alloc_io_data(struct usb_raw_ep_io *io, void __user *ptr, 
		return ERR_PTR(-EINVAL);

	if (!usb_raw_io_flags_valid(io->flags))

		return ERR_PTR(-EINVAL);

	if (io->length > PAGE_SIZE)

		return ERR_PTR(-EINVAL);

	if (get_from_user)

		data = memdup_user(ptr + sizeof(*io), io->length);

	else {