linux-kernel - Re: [PATCH for-next v2 2/3] RDMA/rtrs: Fix the last iu->buf leak in err path

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Message-ID: <CAMGffE=TPTi6+Lr6F2-Xh=Q1gndDDY14hRo9LhNbDb43Y8VxBA@mail.gmail.com>
Date:   Mon, 24 Apr 2023 07:18:27 +0200
From:   Jinpu Wang <jinpu.wang@...os.com>
To:     Li Zhijian <lizhijian@...itsu.com>
Cc:     haris.iqbal@...os.com, jgg@...pe.ca, leon@...nel.org,
        linux-rdma@...r.kernel.org, guoqing.jiang@...ux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH for-next v2 2/3] RDMA/rtrs: Fix the last iu->buf leak in
 err path

On Sun, Apr 23, 2023 at 3:27 AM Li Zhijian <lizhijian@...itsu.com> wrote:
>
> The last iu->buf will leak if ib_dma_mapping_error() fails.
>
> Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
Yes, as guoqing suggested, please add the Fixes tag.
Acked-by: Jack Wang <jinpu.wang@...os.com>
> ---
> V2: new patch to address memory leaking
> ---
>  drivers/infiniband/ulp/rtrs/rtrs.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
> index 4bf9d868cc52..3696f367ff51 100644
> --- a/drivers/infiniband/ulp/rtrs/rtrs.c
> +++ b/drivers/infiniband/ulp/rtrs/rtrs.c
> @@ -37,8 +37,10 @@ struct rtrs_iu *rtrs_iu_alloc(u32 iu_num, size_t size, gfp_t gfp_mask,
>                         goto err;
>
>                 iu->dma_addr = ib_dma_map_single(dma_dev, iu->buf, size, dir);
> -               if (ib_dma_mapping_error(dma_dev, iu->dma_addr))
> +               if (ib_dma_mapping_error(dma_dev, iu->dma_addr)) {
> +                       kfree(iu->buf);
>                         goto err;
> +               }
>
>                 iu->cqe.done  = done;
>                 iu->size      = size;
> --
> 2.29.2
>