diff options
| author | Karan Sanghavi <karansanghvi98@gmail.com> | 2025-02-20 17:34:36 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-10 14:39:24 +0200 |
| commit | 7a40b52d4442178bee0cf1c36bc450ab951cef0f (patch) | |
| tree | 535e165eba10a9eccb4468eb55a018e6baba0f1d | |
| parent | 967570b52826741f51d5ebdbeff264e425c426ce (diff) | |
iio: light: Add check for array bounds in veml6075_read_int_time_ms
[ Upstream commit ee735aa33db16c1fb5ebccbaf84ad38f5583f3cc ]
The array contains only 5 elements, but the index calculated by
veml6075_read_int_time_index can range from 0 to 7,
which could lead to out-of-bounds access. The check prevents this issue.
Coverity Issue
CID 1574309: (#1 of 1): Out-of-bounds read (OVERRUN)
overrun-local: Overrunning array veml6075_it_ms of 5 4-byte
elements at element index 7 (byte offset 31) using
index int_index (which evaluates to 7)
This is hardening against potentially broken hardware. Good to have
but not necessary to backport.
Fixes: 3b82f43238ae ("iio: light: add VEML6075 UVA and UVB light sensor driver")
Signed-off-by: Karan Sanghavi <karansanghvi98@gmail.com>
Reviewed-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/Z7dnrEpKQdRZ2qFU@Emma
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/iio/light/veml6075.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/iio/light/veml6075.c b/drivers/iio/light/veml6075.c index 05d4c0e9015d..859891e8f115 100644 --- a/drivers/iio/light/veml6075.c +++ b/drivers/iio/light/veml6075.c @@ -195,13 +195,17 @@ static int veml6075_read_uv_direct(struct veml6075_data *data, int chan, static int veml6075_read_int_time_index(struct veml6075_data *data) { - int ret, conf; + int ret, conf, int_index; ret = regmap_read(data->regmap, VEML6075_CMD_CONF, &conf); if (ret < 0) return ret; - return FIELD_GET(VEML6075_CONF_IT, conf); + int_index = FIELD_GET(VEML6075_CONF_IT, conf); + if (int_index >= ARRAY_SIZE(veml6075_it_ms)) + return -EINVAL; + + return int_index; } static int veml6075_read_int_time_ms(struct veml6075_data *data, int *val) |