linux-kernel - RE: [PATCH] qedr: return -EINVAL if pd is null and avoid null ptr dereference

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Date:   Thu, 20 Oct 2016 07:12:05 +0000
From:   "Amrani, Ram" <Ram.Amrani@...ium.com>
To:     Colin King <colin.king@...onical.com>,
        Doug Ledford <dledford@...hat.com>,
        Sean Hefty <sean.hefty@...el.com>,
        Hal Rosenstock <hal.rosenstock@...il.com>,
        "Borundia, Rajesh" <Rajesh.Borundia@...ium.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] qedr: return -EINVAL if pd is null and avoid null ptr
 dereference

>  drivers/infiniband/hw/qedr/verbs.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/infiniband/hw/qedr/verbs.c
> b/drivers/infiniband/hw/qedr/verbs.c
> index a615142..b2a0eb8 100644
> --- a/drivers/infiniband/hw/qedr/verbs.c
> +++ b/drivers/infiniband/hw/qedr/verbs.c
> @@ -511,8 +511,10 @@ int qedr_dealloc_pd(struct ib_pd *ibpd)
>  	struct qedr_dev *dev = get_qedr_dev(ibpd->device);
>  	struct qedr_pd *pd = get_qedr_pd(ibpd);
> 
> -	if (!pd)
> +	if (!pd) {
>  		pr_err("Invalid PD received in dealloc_pd\n");
> +		return -EINVAL;
> +	}
> 
>  	DP_DEBUG(dev, QEDR_MSG_INIT, "Deallocating PD %d\n", pd->pd_id);
>  	dev->ops->rdma_dealloc_pd(dev->rdma_ctx, pd->pd_id);
> --
> 2.9.3

Thanks Colin.

Acked-by: Ram Amrani <ram.amrani@...ium.com>