[git:media_stage/master] media: dw2102: fix a potential buffer overflow

[Mauro Carvalho Chehab]

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Subject: media: dw2102: fix a potential buffer overflow
Author:  Mauro Carvalho Chehab <mche...@kernel.org>
Date:    Mon Apr 29 15:15:05 2024 +0100

As pointed by smatch:
         drivers/media/usb/dvb-usb/dw2102.c:802 su3000_i2c_transfer() error: 
__builtin_memcpy() '&state->data[4]' too small (64 vs 67)

That seemss to be due to a wrong copy-and-paste.

Fixes: 0e148a522b84 ("media: dw2102: Don't translate i2c read into write")

Reported-by: Hans Verkuil <hverk...@xs4all.nl>
Reviewed-by: Hans Verkuil <hverk...@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mche...@kernel.org>

 drivers/media/usb/dvb-usb/dw2102.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

---

diff --git a/drivers/media/usb/dvb-usb/dw2102.c 
b/drivers/media/usb/dvb-usb/dw2102.c
index 03b411ad64bb..79e2ccf974c9 100644
--- a/drivers/media/usb/dvb-usb/dw2102.c
+++ b/drivers/media/usb/dvb-usb/dw2102.c
@@ -789,7 +789,7 @@ static int su3000_i2c_transfer(struct i2c_adapter *adap, 
struct i2c_msg msg[],
 
                        if (msg[j].flags & I2C_M_RD) {
                                /* single read */
-                               if (1 + msg[j].len > sizeof(state->data)) {
+                               if (4 + msg[j].len > sizeof(state->data)) {
                                        warn("i2c rd: len=%d is too big!\n", 
msg[j].len);
                                        num = -EOPNOTSUPP;
                                        break;