Commit 821117dc authored Apr 01, 2017 by Alyssa Milburn Committed by Mauro Carvalho Chehab Apr 18, 2017

[media] digitv: limit messages to buffer size



Return an error rather than memcpy()ing beyond the end of the buffer.
Internal callers use appropriate sizes, but digitv_i2c_xfer may not.

Signed-off-by: Alyssa Milburn <amilburn@zall.org>
Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

parent e8357cde

drivers/media/usb/dvb-usb/digitv.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -33,6 +33,9 @@ static int digitv_ctrl_msg(struct dvb_usb_device *d,

		wo = (rbuf == NULL \|\| rlen == 0); /* write-only */

		if (wlen > 4 \|\| rlen > 4)
		return -EIO;

		memset(st->sndbuf, 0, 7);
		memset(st->rcvbuf, 0, 7);