hwmon: qpnp-adc-voltage: Add scale_type checks



Add checks for potential out of bound array overflow
for scale_type index used for reverse scaling.

Change-Id: I73a28505b7f7145790f3e2ad0e9f1781d54a3019
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>

parent c5564588

drivers/hwmon/qpnp-adc-voltage.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1804,7 +1804,9 @@ int32_t qpnp_vadc_channel_monitor(struct qpnp_vadc_chip *chip,
		}

		scale_type = vadc->adc->adc_channels[idx].adc_scale_fn;
		if (scale_type >= SCALE_RSCALE_NONE) {
		if ((scale_type >= SCALE_RVADC_SCALE_NONE) \|\|
		((scale_type != SCALE_RVADC_ABSOLUTE) &&
		(scale_type != SCALE_RVADC_PMIC_THERM))) {
		rc = -EBADF;
		goto fail_unlock;
		}