upstream: [media] ds3000: fix reading array out of bound in ds3000_read_snr

An attempt was made to read dvbs2_snr_tab[80],
though dvbs2_snr_tab has only 80 elements.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/dvb-frontends/ds3000.c b/drivers/media/dvb-frontends/ds3000.c
index 22e8c20..9d0d034 100644 (file)
--- a/drivers/media/dvb-frontends/ds3000.c
+++ b/drivers/media/dvb-frontends/ds3000.c
@@ -616,7 +616,7 @@ static int ds3000_read_snr(struct dvb_frontend *fe, u16 *snr)
                        snr_reading = dvbs2_noise_reading / tmp;
                        if (snr_reading > 80)
                                snr_reading = 80;
-                       *snr = -(dvbs2_snr_tab[snr_reading] / 1000);
+                       *snr = -(dvbs2_snr_tab[snr_reading - 1] / 1000);
                }
                dprintk("%s: raw / cooked = 0x%02x / 0x%04x\n", __func__,
                                snr_reading, *snr);