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| author | Xiaolei Wang <xiaolei.wang@windriver.com> | 2022-08-25 19:19:22 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-08-25 12:29:26 +0100 |
| commit | 78e1e867f44e6bdc72c0e6a2609a3407642fb30b (patch) | |
| tree | f088e67b2335028cd537da06bd49f59f9147c09b | |
| parent | c32f1ebfd26bece77141257864ed7b4720da1557 (diff) | |
| download | linux-78e1e867f44e6bdc72c0e6a2609a3407642fb30b.tar.bz2 | |
regulator: pfuze100: Fix the global-out-of-bounds access in pfuze100_regulator_probe()
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>
| -rw-r--r-- | drivers/regulator/pfuze100-regulator.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/regulator/pfuze100-regulator.c b/drivers/regulator/pfuze100-regulator.c index 6b617024a67d..d899d6e98fb8 100644 --- a/drivers/regulator/pfuze100-regulator.c +++ b/drivers/regulator/pfuze100-regulator.c @@ -766,7 +766,7 @@ 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) |