diff options
| author | Yizhuo <yzhai003@ucr.edu> | 2019-01-30 12:33:30 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-04-22 13:05:54 -0400 |
| commit | 37d1e62b5bb3b1229d0c49f2ee45e67dc67274be (patch) | |
| tree | 98bd9bfc3b581371d916d6e6c51baed904fe72ec | |
| parent | 1e98a8400ae8712f2b2d52ed6c1c6231607ed854 (diff) | |
| download | linux-37d1e62b5bb3b1229d0c49f2ee45e67dc67274be.tar.gz linux-37d1e62b5bb3b1229d0c49f2ee45e67dc67274be.tar.bz2 linux-37d1e62b5bb3b1229d0c49f2ee45e67dc67274be.zip | |
media: ts2020: Variable "utmp" in function ts2020_set_tuner_rf() could be uninitialized
In function ts2020_set_tuner_rf(), local variable "utmp" could
be uninitialized if function regmap_read() returns -EINVAL.
However, this value is used in if statement and written to
the register, which is potentially unsafe.
Signed-off-by: Yizhuo <yzhai003@ucr.edu>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
| -rw-r--r-- | drivers/media/dvb-frontends/ts2020.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/ts2020.c b/drivers/media/dvb-frontends/ts2020.c index e5cd2cd414f4..0af9b335be12 100644 --- a/drivers/media/dvb-frontends/ts2020.c +++ b/drivers/media/dvb-frontends/ts2020.c @@ -180,6 +180,9 @@ static int ts2020_set_tuner_rf(struct dvb_frontend *fe) unsigned int utmp; ret = regmap_read(dev->regmap, 0x3d, &utmp); + if (ret) + return ret; + utmp &= 0x7f; if (utmp < 0x16) utmp = 0xa1; |