* [patch] [media] ttusb-dec: buffer overflow in ioctl
@ 2014-09-05 12:09 Dan Carpenter
0 siblings, 0 replies; only message in thread
From: Dan Carpenter @ 2014-09-05 12:09 UTC (permalink / raw)
To: Mauro Carvalho Chehab; +Cc: linux-media, kernel-janitors
We need to add a limit check here so we don't overflow the buffer.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/media/usb/ttusb-dec/ttusbdecfe.c b/drivers/media/usb/ttusb-dec/ttusbdecfe.c
index 5c45c9d..9c29552 100644
--- a/drivers/media/usb/ttusb-dec/ttusbdecfe.c
+++ b/drivers/media/usb/ttusb-dec/ttusbdecfe.c
@@ -156,6 +156,9 @@ static int ttusbdecfe_dvbs_diseqc_send_master_cmd(struct dvb_frontend* fe, struc
0x00, 0x00, 0x00, 0x00,
0x00, 0x00 };
+ if (cmd->msg_len > sizeof(b) - 4)
+ return -EINVAL;
+
memcpy(&b[4], cmd->msg, cmd->msg_len);
state->config->send_command(fe, 0x72,
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2014-09-05 12:09 [patch] [media] ttusb-dec: buffer overflow in ioctl Dan Carpenter
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