linux-kernel - Re: [PATCH] fix a leak in bch_cached_dev

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Date:	Sat, 1 Nov 2014 13:38:16 -0700
From:	Kent Overstreet <kmo@...erainc.com>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, linux-bcache@...r.kernel.org
Subject: Re: [PATCH] fix a leak in bch_cached_dev_run()

On Thu, Oct 30, 2014 at 05:42:09AM +0000, Al Viro wrote:
> Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
> 
> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
> --- a/drivers/md/bcache/super.c
> +++ b/drivers/md/bcache/super.c
> @@ -878,8 +878,11 @@ void bch_cached_dev_run(struct cached_dev *dc)
>  	buf[SB_LABEL_SIZE] = '\0';
>  	env[2] = kasprintf(GFP_KERNEL, "CACHED_LABEL=%s", buf);
>  
> -	if (atomic_xchg(&dc->running, 1))
> +	if (atomic_xchg(&dc->running, 1)) {
> +		kfree(env[1]);
> +		kfree(env[2]);
>  		return;
> +	}
>  
>  	if (!d->c &&
>  	    BDEV_STATE(&dc->sb) != BDEV_STATE_NONE) {

Thanks, applied
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