linux-kernel - Re: [PATCH] Provider/rxe: Allocate rxe/ib objs by calloc

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Date:   Thu, 30 Sep 2021 12:41:55 +0000
From:   Haakon Bugge <haakon.bugge@...cle.com>
To:     Shunsuke Mie <mie@...l.co.jp>
CC:     Zhu Yanjun <zyjzyj2000@...il.com>,
        Doug Ledford <dledford@...hat.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        OFED mailing list <linux-rdma@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Provider/rxe: Allocate rxe/ib objs by calloc



> On 30 Sep 2021, at 13:35, Shunsuke Mie <mie@...l.co.jp> wrote:
> 
> Some rxe/ib objects are allocated by malloc() and initialize manually
> respectively. To prevent a bug caused by memory uninitialization, this
> patch change to use calloc().
> 
> Signed-off-by: Shunsuke Mie <mie@...l.co.jp>


LGTM,

Reviewed-by: Håkon Bugge <haakon.bugge@...cle.com>


Thxs, Håkon

> ---
> providers/rxe/rxe.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/providers/rxe/rxe.c b/providers/rxe/rxe.c
> index 3533a325..788a1bbd 100644
> --- a/providers/rxe/rxe.c
> +++ b/providers/rxe/rxe.c
> @@ -104,7 +104,7 @@ static struct ibv_pd *rxe_alloc_pd(struct ibv_context *context)
> 	struct ib_uverbs_alloc_pd_resp resp;
> 	struct ibv_pd *pd;
> 
> -	pd = malloc(sizeof(*pd));
> +	pd = calloc(1, sizeof(*pd));
> 	if (!pd)
> 		return NULL;
> 
> @@ -225,7 +225,7 @@ static struct ibv_mr *rxe_reg_mr(struct ibv_pd *pd, void *addr, size_t length,
> 	struct ib_uverbs_reg_mr_resp resp;
> 	int ret;
> 
> -	vmr = malloc(sizeof(*vmr));
> +	vmr = calloc(1, sizeof(*vmr));
> 	if (!vmr)
> 		return NULL;
> 
> @@ -382,7 +382,7 @@ static struct ibv_cq *rxe_create_cq(struct ibv_context *context, int cqe,
> 	struct urxe_create_cq_resp resp = {};
> 	int ret;
> 
> -	cq = malloc(sizeof(*cq));
> +	cq = calloc(1, sizeof(*cq));
> 	if (!cq)
> 		return NULL;
> 
> @@ -594,7 +594,7 @@ static struct ibv_srq *rxe_create_srq(struct ibv_pd *pd,
> 	struct urxe_create_srq_resp resp;
> 	int ret;
> 
> -	srq = malloc(sizeof(*srq));
> +	srq = calloc(1, sizeof(*srq));
> 	if (srq == NULL)
> 		return NULL;
> 
> @@ -1167,7 +1167,7 @@ static struct ibv_qp *rxe_create_qp(struct ibv_pd *ibpd,
> 	struct rxe_qp *qp;
> 	int ret;
> 
> -	qp = malloc(sizeof(*qp));
> +	qp = calloc(1, sizeof(*qp));
> 	if (!qp)
> 		goto err;
> 
> @@ -1659,7 +1659,7 @@ static struct ibv_ah *rxe_create_ah(struct ibv_pd *pd, struct ibv_ah_attr *attr)
> 		return NULL;
> 	}
> 
> -	ah = malloc(sizeof(*ah));
> +	ah = calloc(1, sizeof(*ah));
> 	if (ah == NULL)
> 		return NULL;
> 
> -- 
> 2.17.1
>