From: Xiaolei Wang <xiaolei.wang@xxxxxxxxxxxxx> [ Upstream commit 78e1e867f44e6bdc72c0e6a2609a3407642fb30b ] The pfuze_chip::regulator_descs is an array of size PFUZE100_MAX_REGULATOR, the pfuze_chip::pfuze_regulators is the pointer to the real regulators of a specific device. The number of real regulator is supposed to be less than the PFUZE100_MAX_REGULATOR, so we should use the size of 'regulator_num * sizeof(struct pfuze_regulator)' in memcpy(). This fixes the out of bounds access bug reported by KASAN. Signed-off-by: Xiaolei Wang <xiaolei.wang@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20220825111922.1368055-1-xiaolei.wang@xxxxxxxxxxxxx Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/regulator/pfuze100-regulator.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c index 587a6bf9037b..6b9c29d6825d 100644 --- a/drivers/regulator/pfuze100-regulator.c +++ b/drivers/regulator/pfuze100-regulator.c @@ -614,7 +614,7 @@ static int pfuze100_regulator_probe(struct i2c_client *client, ((pfuze_chip->chip_id == PFUZE200) ? "200" : "3000")); memcpy(pfuze_chip->regulator_descs, pfuze_chip->pfuze_regulators, - sizeof(pfuze_chip->regulator_descs)); + regulator_num * sizeof(struct pfuze_regulator)); ret = pfuze_parse_regulators_dt(pfuze_chip); if (ret) -- 2.35.1
