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| author | Colin Ian King <colin.king@canonical.com> | 2020-10-07 14:16:28 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-03-22 17:41:39 +0100 |
| commit | 9baa3d64e8e2373ddd11c346439e5dfccb2cbb0d (patch) | |
| tree | b9610c4af8810da0216fddf667ddbdb866d61785 /drivers/media/tuners | |
| parent | dfe59c78f4cc1924031e1be3120feb3f126da8ed (diff) | |
| download | linux-9baa3d64e8e2373ddd11c346439e5dfccb2cbb0d.tar.bz2 | |
media: m88rs6000t: avoid potential out-of-bounds reads on arrays
There a 3 array for-loops that don't check the upper bounds of the
index into arrays and this may lead to potential out-of-bounds
reads. Fix this by adding array size upper bounds checks to be
full safe.
Addresses-Coverity: ("Out-of-bounds read")
Link: https://lore.kernel.org/linux-media/20201007121628.20676-1-colin.king@canonical.com
Fixes: 333829110f1d ("[media] m88rs6000t: add new dvb-s/s2 tuner for integrated chip M88RS6000")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'drivers/media/tuners')
| -rw-r--r-- | drivers/media/tuners/m88rs6000t.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/media/tuners/m88rs6000t.c b/drivers/media/tuners/m88rs6000t.c index b3505f402476..8647c50b66e5 100644 --- a/drivers/media/tuners/m88rs6000t.c +++ b/drivers/media/tuners/m88rs6000t.c @@ -525,7 +525,7 @@ static int m88rs6000t_get_rf_strength(struct dvb_frontend *fe, u16 *strength) PGA2_cri = PGA2_GC >> 2; PGA2_crf = PGA2_GC & 0x03; - for (i = 0; i <= RF_GC; i++) + for (i = 0; i <= RF_GC && i < ARRAY_SIZE(RFGS); i++) RFG += RFGS[i]; if (RF_GC == 0) @@ -537,12 +537,12 @@ static int m88rs6000t_get_rf_strength(struct dvb_frontend *fe, u16 *strength) if (RF_GC == 3) RFG += 100; - for (i = 0; i <= IF_GC; i++) + for (i = 0; i <= IF_GC && i < ARRAY_SIZE(IFGS); i++) IFG += IFGS[i]; TIAG = TIA_GC * TIA_GS; - for (i = 0; i <= BB_GC; i++) + for (i = 0; i <= BB_GC && i < ARRAY_SIZE(BBGS); i++) BBG += BBGS[i]; PGA2G = PGA2_cri * PGA2_cri_GS + PGA2_crf * PGA2_crf_GS; |