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| author | Xiaolei Wang <xiaolei.wang@windriver.com> | 2022-08-25 14:19:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-09-28 11:56:48 +0300 |
| commit | 8f4ef1ee2fd2129b04a63b21a393622d14ded8e6 (patch) | |
| tree | 76cef32ac9491bec19d904d8c15c06953f75e9ce /drivers/regulator | |
| parent | 2161c2571cb088f2d476001e4ff07d6a87a68009 (diff) | |
| download | linux-8f4ef1ee2fd2129b04a63b21a393622d14ded8e6.tar.xz | |
regulator: pfuze100: Fix the global-out-of-bounds access in pfuze100_regulator_probe()
[ 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>
Diffstat (limited to 'drivers/regulator')
| -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 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) |