linux-kernel - Re: [PATCH] power: supply: Added check for negative values

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Message-ID: <20230102221941.hw35od6uhu7fbfny@mercury.elektranox.org>
Date:   Mon, 2 Jan 2023 23:19:41 +0100
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Denis Arefev <arefev@...mel.ru>, Chen-Yu Tsai <wens@...e.org>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        lvc-project@...uxtesting.org, trufanov@...mel.ru, vfh@...mel.ru
Subject: Re: [PATCH] power: supply: Added check for negative values

Hi,

On Tue, Dec 06, 2022 at 06:11:23PM +0100, Hans de Goede wrote:
> Hi,
> 
> On 12/6/22 10:17, Denis Arefev wrote:
> > Variable 'pirq', which may receive negative value
> > in platform_get_irq().
> > Used as an index in a function regmap_irq_get_virq().
> > 
> > Found by Linux Verification Center (linuxtesting.org) with SVACE.
> > 
> > Signed-off-by: Denis Arefev <arefev@...mel.ru>
> 
> Thanks, patch looks good to me:
> 
> Reviewed-by: Hans de Goede <hdegoede@...hat.com>
> 
> Regards,
> 
> Hans

Thanks, queued to power-supply's fixes branch.

-- Sebastian

> 
> > ---
> >  drivers/power/supply/axp288_fuel_gauge.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/drivers/power/supply/axp288_fuel_gauge.c b/drivers/power/supply/axp288_fuel_gauge.c
> > index 148eb8105803..36c7039c99c2 100644
> > --- a/drivers/power/supply/axp288_fuel_gauge.c
> > +++ b/drivers/power/supply/axp288_fuel_gauge.c
> > @@ -640,6 +640,8 @@ static void fuel_gauge_init_irq(struct axp288_fg_info *info)
> >  
> >  	for (i = 0; i < AXP288_FG_INTR_NUM; i++) {
> >  		pirq = platform_get_irq(info->pdev, i);
> > +		if (pirq < 0)
> > +			continue;
> >  		info->irq[i] = regmap_irq_get_virq(info->regmap_irqc, pirq);
> >  		if (info->irq[i] < 0) {
> >  			dev_warn(&info->pdev->dev,
> 

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