linux-kernel - Re: [PATCH] "clocksource/drivers/cadence_ttc: fix memory leak in ttc_setup

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Message-ID: <b3170c38-086a-5d6d-80dd-5424c53ed336@xilinx.com>
Date:   Tue, 10 Nov 2020 11:07:12 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     Michal Simek <michal.simek@...inx.com>,
        Yu Kuai <yukuai3@...wei.com>, <daniel.lezcano@...aro.org>,
        <tglx@...utronix.de>, <soren.brinkmann@...inx.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <yi.zhang@...wei.com>,
        <zhangxiaoxu5@...wei.com>
Subject: Re: [PATCH] "clocksource/drivers/cadence_ttc: fix memory leak in
 ttc_setup_clockevent()



On 10. 11. 20 11:04, Michal Simek wrote:
> 
> 
> On 10. 11. 20 2:15, Yu Kuai wrote:
>> If clk_notifier_register() failed, ttc_setup_clockevent() will return
>> without freeing 'ttcce', which will leak memory.
>>
>> Fixes: 70504f311d4b ("clocksource/drivers/cadence_ttc: Convert init function to return error")
>> Reported-by: Hulk Robot <hulkci@...wei.com>
>> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
>> ---
>>  drivers/clocksource/timer-cadence-ttc.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/clocksource/timer-cadence-ttc.c b/drivers/clocksource/timer-cadence-ttc.c
>> index 80e960602030..32b9560ce408 100644
>> --- a/drivers/clocksource/timer-cadence-ttc.c
>> +++ b/drivers/clocksource/timer-cadence-ttc.c
>> @@ -426,6 +426,7 @@ static int __init ttc_setup_clockevent(struct clk *clk,
>>  				    &ttcce->ttc.clk_rate_change_nb);
>>  	if (err) {
>>  		pr_warn("Unable to register clock notifier.\n");
>> +		kfree(ttcce);
>>  		return err;
>>  	}
>>  
>>
> 
> Reviewed-by: Michal Simek <michal.simek@...inx.com>

One thing I have noticed. Please fix your subject. Remove " from it.

Thanks,
Michal