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[media] dvb: si21xx: buffer overflow in si21_writeregs()
"len" is user controlled and can be up to 255. Anything more than 59 will cause a buffer overflow so we need to add a test for that. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -236,6 +236,9 @@ static int si21_writeregs(struct si21xx_state *state, u8 reg1,
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.len = len + 1
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};
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if (len > sizeof(buf) - 1)
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return -EINVAL;
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msg.buf[0] = reg1;
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memcpy(msg.buf + 1, data, len);
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