* [PATCH] tc358743: limit msg.len to CEC_MAX_MSG_SIZE
@ 2022-08-24 7:00 Hans Verkuil
0 siblings, 0 replies; only message in thread
From: Hans Verkuil @ 2022-08-24 7:00 UTC (permalink / raw)
To: linux-media
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>
---
diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
index e18b8947ad7e..804b8ee8e4ab 100644
--- 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;
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2022-08-24 7:00 [PATCH] tc358743: limit msg.len to CEC_MAX_MSG_SIZE Hans Verkuil
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