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From: Dmitry Osipenko <digetx@gmail.com>
To: Minchan Kim <minchan@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>,
	gregkh@linuxfoundation.org, surenb@google.com,
	joaodias@google.com, jhubbard@nvidia.com, willy@infradead.org
Subject: Re: [PATCH] mm: cma: fix corruption cma_sysfs_alloc_pages_count
Date: Wed, 24 Mar 2021 22:43:49 +0300	[thread overview]
Message-ID: <18ee5c3e-fba2-0d8d-bd93-5fb8d0dd7a01@gmail.com> (raw)
In-Reply-To: <20210324192044.1505747-1-minchan@kernel.org>

24.03.2021 22:20, Minchan Kim пишет:
>  static int __init cma_sysfs_init(void)
>  {
> -	int i = 0;
> +	struct kobject *cma_kobj_root;
> +	struct cma_kobject *cma_kobj;
>  	struct cma *cma;
> +	unsigned int i;

>  	while (--i >= 0) {

Do you realize that this doesn't work anymore?

>  		cma = &cma_areas[i];
> -		kobject_put(&cma->stat->kobj);
> -	}
>  
> -	kfree(cma_stats);
> -	kobject_put(cma_kobj);
> +		kobject_put(&cma->cma_kobj->kobj);
> +		kfree(cma->cma_kobj);

Freeing a null pointer?

> +		cma->cma_kobj = NULL;
> +	}
> +	kobject_put(cma_kobj_root);



  reply	other threads:[~2021-03-24 19:43 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-24 19:20 Minchan Kim
2021-03-24 19:43 ` Dmitry Osipenko [this message]
2021-03-24 19:49   ` Minchan Kim
2021-03-24 19:49   ` Dmitry Osipenko
2021-03-24 19:57     ` Minchan Kim
2021-03-24 20:02       ` Dmitry Osipenko
2021-03-24 20:55         ` Minchan Kim
2021-03-24 19:45 ` John Hubbard
2021-03-24 19:53   ` David Hildenbrand
2021-03-24 19:55     ` Minchan Kim

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