Messages in this thread | | | From | "Hennerich, Michael" <> | Subject | RE: [PATCH -next 1/2] power: supply: adp5061: fix out-of-bounds read in adp5061_get_chg_type() | Date | Mon, 5 Sep 2022 11:46:59 +0000 |
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> -----Original Message----- > From: Wei Yongjun <weiyongjun1@huawei.com> > Sent: Samstag, 27. August 2022 09:32 > To: Hennerich, Michael <Michael.Hennerich@analog.com>; Sebastian > Reichel <sre@kernel.org> > Cc: Wei Yongjun <weiyongjun1@huawei.com>; linux-pm@vger.kernel.org; > linux-kernel@vger.kernel.org > Subject: [PATCH -next 1/2] power: supply: adp5061: fix out-of-bounds read in > adp5061_get_chg_type() > > > ADP5061_CHG_STATUS_1_CHG_STATUS is masked with 0x07, which means > a length of 8, but adp5061_chg_type array size is 4, may end up reading 4 > elements beyond the end of the adp5061_chg_type[] array. > > Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Michael Hennerich <michael.hennerich@analog.com>
> --- > drivers/power/supply/adp5061.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/drivers/power/supply/adp5061.c > b/drivers/power/supply/adp5061.c index 003557043ab3..daee1161c305 > 100644 > --- a/drivers/power/supply/adp5061.c > +++ b/drivers/power/supply/adp5061.c > @@ -427,11 +427,11 @@ static int adp5061_get_chg_type(struct > adp5061_state *st, > if (ret < 0) > return ret; > > - chg_type = > adp5061_chg_type[ADP5061_CHG_STATUS_1_CHG_STATUS(status1)]; > - if (chg_type > ADP5061_CHG_FAST_CV) > + chg_type = ADP5061_CHG_STATUS_1_CHG_STATUS(status1); > + if (chg_type >= ARRAY_SIZE(adp5061_chg_type)) > val->intval = POWER_SUPPLY_STATUS_UNKNOWN; > else > - val->intval = chg_type; > + val->intval = adp5061_chg_type[chg_type]; > > return ret; > } > -- > 2.34.1
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