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regulator: pfuze100: Fix the global-out-of-bounds access in pfuze100_regulator_probe()

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[ 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@windriver.com>
Link: https://lore.kernel.org/r/20220825111922.1368055-1-xiaolei.wang@windriver.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiaolei Wang 2022-08-25 19:19:22 +08:00 committed by Greg Kroah-Hartman
parent 17a21341d9
commit da01ec04a0
1 changed files with 1 additions and 1 deletions
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2
drivers/regulator/pfuze100-regulator.c
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@ -788,7 +788,7 @@ static int pfuze100_regulator_probe(struct i2c_client *client,
((pfuze_chip->chip_id == PFUZE3000) ? "3000" : "3001"))));
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)