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media: tc358743: limit msg.len to CEC_MAX_MSG_SIZE
author
Hans Verkuil
<hverkuil-cisco@xs4all.nl>
Wed, 24 Aug 2022 07:00:24 +0000
(09:00 +0200)
committer
Mauro Carvalho Chehab
<mchehab@kernel.org>
Tue, 30 Aug 2022 05:37:24 +0000
(07:37 +0200)
I expect that the hardware will have limited this to 16, but just in
case it hasn't, check for this corner case.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
drivers/media/i2c/tc358743.c
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diff --git
a/drivers/media/i2c/tc358743.c
b/drivers/media/i2c/tc358743.c
index
e18b894
..
804b8ee
100644
(file)
--- a/
drivers/media/i2c/tc358743.c
+++ b/
drivers/media/i2c/tc358743.c
@@
-964,6
+964,8
@@
static void tc358743_cec_handler(struct v4l2_subdev *sd, u16 intstatus,
v = i2c_rd32(sd, CECRCTR);
msg.len = v & 0x1f;
+ if (msg.len > CEC_MAX_MSG_SIZE)
+ msg.len = CEC_MAX_MSG_SIZE;
for (i = 0; i < msg.len; i++) {
v = i2c_rd32(sd, CECRBUF1 + i * 4);
msg.msg[i] = v & 0xff;