From e10601e6ce2a74fa525c6322a126edac22a63abb Mon Sep 17 00:00:00 2001 From: Dan Carpenter 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 Signed-off-by: Mauro Carvalho Chehab UpstreamStatus: Backport Reference: http://git.kernel.org/cgit/linux/kernel/git/torvalds/ linux.git/commit/?id=f2e323ec96077642d397bb1c355def536d489d16 Signed-off-by: Shrikant Bobade --- 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