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regulator: fan53555: Check pdata->slew_rate setting 

Current code does not really avoid array access out of bounds,
fix it by add checking for pdata->slew_rate.
If pdata->slew_rate is too big, it's a bug in pdata that needs fix.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Axel Lin 2019-02-24 11:21:46 +08:00 committed by Mark Brown
parent 5db2efbe11
commit 87919e0cf1
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GPG Key ID: 24D68B725D5487D0
1 changed files with 5 additions and 3 deletions
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8
drivers/regulator/fan53555.c
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@ -490,11 +490,13 @@ static int fan53555_regulator_probe(struct i2c_client *client,
} else {
/* if no ramp constraint set, get the pdata ramp_delay */
if (!di->regulator->constraints.ramp_delay) {
int slew_idx = (pdata->slew_rate & 0x7)
? pdata->slew_rate : 0;
if (pdata->slew_rate >= ARRAY_SIZE(slew_rates)) {
dev_err(&client->dev, "Invalid slew_rate\n");
return -EINVAL;
}
di->regulator->constraints.ramp_delay
= slew_rates[slew_idx];
= slew_rates[pdata->slew_rate];
}
di->vendor = id->driver_data;