linux-kernel - Re: [PATCH 2/2] lightnvm: fix bad back free on error path

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Date:   Thu, 4 May 2017 10:04:53 +0200
From:   Matias Bjørling <m@...rling.me>
To:     Javier González <jg@...htnvm.io>, mb@...htnvm.io
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Javier González <javier@...xlabs.com>,
        Jens Axboe <axboe@...com>
Subject: Re: [PATCH 2/2] lightnvm: fix bad back free on error path

On 05/03/2017 11:19 AM, Javier González wrote:
> Free memory correctly when an allocation fails on a loop and we free
> backwards previously successful allocations.
>
> Signed-off-by: Javier González <javier@...xlabs.com>
> ---
>  drivers/lightnvm/core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c
> index 54a06c3a2b8c..6a4aa608ad95 100644
> --- a/drivers/lightnvm/core.c
> +++ b/drivers/lightnvm/core.c
> @@ -74,7 +74,7 @@ static int nvm_reserve_luns(struct nvm_dev *dev, int lun_begin, int lun_end)
>
>  	return 0;
>  err:
> -	while (--i > lun_begin)
> +	while (--i >= lun_begin)
>  		clear_bit(i, dev->lun_map);
>
>  	return -EBUSY;
> @@ -211,7 +211,7 @@ static struct nvm_tgt_dev *nvm_create_tgt_dev(struct nvm_dev *dev,
>
>  	return tgt_dev;
>  err_ch:
> -	while (--i > 0)
> +	while (--i >= 0)
>  		kfree(dev_map->chnls[i].lun_offs);
>  	kfree(luns);
>  err_luns:
>

Reviewed-by: Matias Bjørling <matias@...xlabs.com>

Jens, and this baby as well? :)