linux-kernel - Re: [PATCH] sched: fix double kfree

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Message-ID: <84144f020901060150i524a4fatdc1c2ca86ab2adab@mail.gmail.com>
Date:	Tue, 6 Jan 2009 11:50:56 +0200
From:	"Pekka Enberg" <penberg@...helsinki.fi>
To:	"Li Zefan" <lizf@...fujitsu.com>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Rusty Russell" <rusty@...tcorp.com.au>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sched: fix double kfree

On Tue, Jan 6, 2009 at 11:39 AM, Li Zefan <lizf@...fujitsu.com> wrote:
> Impact: fix double kfree in failure path
>
> It's not the responsibility of init_rootdomain() to free root_domain
> allocated by alloc_rootdomain().
>
> Signed-off-by: Li Zefan <lizf@...fujitsu.com>

FWIW

Reviewed-by: Pekka Enberg <penberg@...helsinki.fi>

> ---
>  kernel/sched.c |    5 ++---
>  1 files changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/kernel/sched.c b/kernel/sched.c
> index 545c6fc..2bad712 100644
> --- a/kernel/sched.c
> +++ b/kernel/sched.c
> @@ -6970,7 +6970,7 @@ static int init_rootdomain(struct root_domain *rd, bool bootmem)
>        }
>
>        if (!alloc_cpumask_var(&rd->span, GFP_KERNEL))
> -               goto free_rd;
> +               goto out;
>        if (!alloc_cpumask_var(&rd->online, GFP_KERNEL))
>                goto free_span;
>        if (!alloc_cpumask_var(&rd->rto_mask, GFP_KERNEL))
> @@ -6986,8 +6986,7 @@ free_online:
>        free_cpumask_var(rd->online);
>  free_span:
>        free_cpumask_var(rd->span);
> -free_rd:
> -       kfree(rd);
> +out:
>        return -ENOMEM;
>  }
>
> --
> 1.5.4.rc3
>
> --
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