linux-kernel - Re: [PATCH 3/5] lightnvm: pblk: fix memory leak on error path

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Date:   Sat, 22 Apr 2017 10:57:46 +0200
From:   Matias Bjørling <mb@...htnvm.io>
To:     Javier González <jg@...htnvm.io>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Javier González <javier@...xlabs.com>
Subject: Re: [PATCH 3/5] lightnvm: pblk: fix memory leak on error path



On 04/22/2017 01:32 AM, Javier González wrote:
> When write recovery fails, Free memory for the recovery structure.
>
> Fixes: a4bd217b4326 "lightnvm: physical block device (pblk) target"
>
> Signed-off-by: Javier González <javier@...xlabs.com>
> ---
>  drivers/lightnvm/pblk-write.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/lightnvm/pblk-write.c b/drivers/lightnvm/pblk-write.c
> index 74f7413..a896190 100644
> --- a/drivers/lightnvm/pblk-write.c
> +++ b/drivers/lightnvm/pblk-write.c
> @@ -142,6 +142,7 @@ static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd)
>  		/* Logic error */
>  		if (bit > c_ctx->nr_valid) {
>  			WARN_ONCE(1, "pblk: corrupted write request\n");
> +			mempool_free(recovery, pblk->rec_pool);
>  			goto out;
>  		}
>
> @@ -149,6 +150,7 @@ static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd)
>  		entry = pblk_rb_sync_scan_entry(&pblk->rwb, &ppa);
>  		if (!entry) {
>  			pr_err("pblk: could not scan entry on write failure\n");
> +			mempool_free(recovery, pblk->rec_pool);
>  			goto out;
>  		}
>
> @@ -162,6 +164,7 @@ static void pblk_end_w_fail(struct pblk *pblk, struct nvm_rq *rqd)
>  	ret = pblk_recov_setup_rq(pblk, c_ctx, recovery, comp_bits, c_entries);
>  	if (ret) {
>  		pr_err("pblk: could not recover from write failure\n");
> +		mempool_free(recovery, pblk->rec_pool);
>  		goto out;
>  	}
>
>
Reviewed-by: Matias Bjørling <matias@...xlabs.com>