linux-kernel - Re: [PATCH] PM / OPP: Handle return value of kasprintf

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Message-ID: <59C29E3C.5010703@gmail.com>
Date:   Wed, 20 Sep 2017 22:28:36 +0530
From:   arvind <arvind.yadav.cs@...il.com>
To:     Viresh Kumar <viresh.kumar@...aro.org>,
        Joe Perches <joe@...ches.com>
Cc:     vireshk@...nel.org, nm@...com, sboyd@...eaurora.org,
        rjw@...ysocki.net, pavel@....cz, len.brown@...el.com,
        gregkh@...uxfoundation.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] PM / OPP: Handle return value of kasprintf

Hi,

On Wednesday 20 September 2017 08:19 PM, Viresh Kumar wrote:
> On 20-09-17, 04:17, Joe Perches wrote:
>> On Wed, 2017-09-20 at 12:29 +0530, Arvind Yadav wrote:
>>> kasprintf() can fail here and we must check its return value.
>> []
>>> diff --git a/drivers/base/power/opp/debugfs.c b/drivers/base/power/opp/debugfs.c
>> []
>>> @@ -45,7 +45,8 @@ static bool opp_debug_create_supplies(struct dev_pm_opp *opp,
>>>   
>>>   	for (i = 0; i < opp_table->regulator_count; i++) {
>>>   		name = kasprintf(GFP_KERNEL, "supply-%d", i);
>>> -
>>> +		if (!name)
>>> +			return false;
>>>   		/* Create per-opp directory */
>>>   		d = debugfs_create_dir(name, pdentry);
>> Probably more sensible to avoid the kasprintf/kfree
>> and just have
>> 	char name[20];
>> on the stack
> Sure.
>
> @Arvind: I will let you write that patch.
Yes, I will do.
>
~arvind