Commit 821117dc authored by Alyssa Milburn's avatar Alyssa Milburn Committed by Mauro Carvalho Chehab

[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: default avatarAlyssa Milburn <amilburn@zall.org>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent e8357cde
...@@ -33,6 +33,9 @@ static int digitv_ctrl_msg(struct dvb_usb_device *d, ...@@ -33,6 +33,9 @@ static int digitv_ctrl_msg(struct dvb_usb_device *d,
wo = (rbuf == NULL || rlen == 0); /* write-only */ wo = (rbuf == NULL || rlen == 0); /* write-only */
if (wlen > 4 || rlen > 4)
return -EIO;
memset(st->sndbuf, 0, 7); memset(st->sndbuf, 0, 7);
memset(st->rcvbuf, 0, 7); memset(st->rcvbuf, 0, 7);
......
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