linux-kernel - Re: [PATCH -next] RDMA/rtrs: fix potential resources leaks

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Date:   Fri, 19 Jun 2020 15:16:57 +0200
From:   Jinpu Wang <jinpu.wang@...ud.ionos.com>
To:     Bo YU <tsu.yubo@...il.com>
Cc:     Danil Kipnis <danil.kipnis@...ud.ionos.com>, ledford@...hat.com,
        Jason Gunthorpe <jgg@...pe.ca>, linux-rdma@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] RDMA/rtrs: fix potential resources leaks

Hi, Bo,
On Fri, Jun 19, 2020 at 3:10 PM Bo YU <tsu.yubo@...il.com> wrote:
>
> Dev is returned from allocation function kzalloc but it does not
> free it in out_err path.
If allocation failed, kzalloc return NULL, nothing to free.
>
> Detected by CoverityScan, CID# 1464569: (Resource leak)
>
> Fixes: c0894b3ea69d3("RDMA/rtrs: core: lib functions shared between client and server modules")
> Signed-off-by: Bo YU <tsu.yubo@...il.com>
> ---
>  drivers/infiniband/ulp/rtrs/rtrs.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
> index ff1093d6e4bc..03bdab92fa49 100644
> --- a/drivers/infiniband/ulp/rtrs/rtrs.c
> +++ b/drivers/infiniband/ulp/rtrs/rtrs.c
> @@ -607,6 +607,7 @@ rtrs_ib_dev_find_or_add(struct ib_device *ib_dev,
>         else
>                 kfree(dev);
>  out_err:
> +       kfree(dev);
>         return NULL;
>  }
>  EXPORT_SYMBOL(rtrs_ib_dev_find_or_add);
> --
> 2.11.0
>