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Date: Fri, 31 Jul 2015 12:38:38 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Mauro Carvalho Chehab <mchehab@....samsung.com> Subject: [PATCH 4.1 067/267] [media] cx24117: fix a buffer overflow when checking userspace params 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mauro Carvalho Chehab <mchehab@....samsung.com> commit 82e3b88b679049f043fe9b03991d6d66fc0a43c8 upstream. The maximum size for a DiSEqC command is 6, according to the userspace API. However, the code allows to write up much more values: drivers/media/dvb-frontends/cx24116.c:983 cx24116_send_diseqc_msg() error: buffer overflow 'd->msg' 6 <= 23 Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/media/dvb-frontends/cx24117.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/media/dvb-frontends/cx24117.c +++ b/drivers/media/dvb-frontends/cx24117.c @@ -1043,7 +1043,7 @@ static int cx24117_send_diseqc_msg(struc dev_dbg(&state->priv->i2c->dev, ")\n"); /* Validate length */ - if (d->msg_len > 15) + if (d->msg_len > sizeof(d->msg)) return -EINVAL; /* DiSEqC message */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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