linux-kernel - Re: [tip:sched/urgent] sched/cpufreq: Fix kobject memleak

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Message-ID: <20190430055627.oukh3dq6tk74q3wm@vireshk-i7>
Date:   Tue, 30 Apr 2019 11:26:27 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     mingo@...nel.org
Cc:     torvalds@...ux-foundation.org, gregkh@...uxfoundation.org,
        hpa@...or.com, tglx@...utronix.de, vincent.guittot@...aro.org,
        peterz@...radead.org, rafael.j.wysocki@...el.com, tobin@...nel.org,
        linux-kernel@...r.kernel.org, linux-tip-commits@...r.kernel.org
Subject: Re: [tip:sched/urgent] sched/cpufreq: Fix kobject memleak

On 29-04-19, 22:52, tip-bot for Tobin C. Harding wrote:
> Commit-ID:  8bf7ab9c79f3d1a5f02ebac369f656de9ec0aca8
> Gitweb:     https://git.kernel.org/tip/8bf7ab9c79f3d1a5f02ebac369f656de9ec0aca8
> Author:     Tobin C. Harding <tobin@...nel.org>
> AuthorDate: Tue, 30 Apr 2019 10:11:44 +1000
> Committer:  Ingo Molnar <mingo@...nel.org>
> CommitDate: Tue, 30 Apr 2019 06:24:09 +0200
> 
> sched/cpufreq: Fix kobject memleak
> 
> Currently the error return path from kobject_init_and_add() is not
> followed by a call to kobject_put() - which means we are leaking
> the kobject.
> 
> Fix it by adding a call to kobject_put() in the error path of
> kobject_init_and_add().
> 
> Signed-off-by: Tobin C. Harding <tobin@...nel.org>
> Add call to kobject_put() in error path of kobject_init_and_add().

This should have been present before the signed-off ?

> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Tobin C. Harding <tobin@...nel.org>
> Cc: Vincent Guittot <vincent.guittot@...aro.org>
> Cc: Viresh Kumar <viresh.kumar@...aro.org>
> Link: http://lkml.kernel.org/r/20190430001144.24890-1-tobin@kernel.org
> Signed-off-by: Ingo Molnar <mingo@...nel.org>
> ---
>  kernel/sched/cpufreq_schedutil.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
> index 5c41ea367422..3638d2377e3c 100644
> --- a/kernel/sched/cpufreq_schedutil.c
> +++ b/kernel/sched/cpufreq_schedutil.c
> @@ -771,6 +771,7 @@ out:
>  	return 0;
>  
>  fail:
> +	kobject_put(&tunables->attr_set.kobj);
>  	policy->governor_data = NULL;
>  	sugov_tunables_free(tunables);
>  

-- 
viresh