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From e10601e6ce2a74fa525c6322a126edac22a63abb Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri, 5 Sep 2014 09:09:28 -0300
Subject: [PATCH] [media] ttusb-dec: buffer overflow in ioctl
We need to add a limit check here so we don't overflow the buffer.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
UpstreamStatus: Backport
Reference: http://git.kernel.org/cgit/linux/kernel/git/torvalds/
linux.git/commit/?id=f2e323ec96077642d397bb1c355def536d489d16
Signed-off-by: Shrikant Bobade <Shrikant_Bobade@mentor.com>
---
drivers/media/usb/ttusb-dec/ttusbdecfe.c | 3 +++
1 file changed, 3 insertions(+)
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,
--
1.7.9.5
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