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

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Message-ID: <1ff2a871-849e-cbac-b731-8104da213637@xilinx.com>
Date:   Tue, 10 Nov 2020 11:04:22 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     Yu Kuai <yukuai3@...wei.com>, <michal.simek@...inx.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 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>

Thanks,
Michal