Re: [PATCH] ibverbs/rxe: Remove variable self-initialization

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On Tue, Jul 02, 2019 at 03:49:28PM +0200, Maksym Planeta wrote:
> In some cases (not in this particular one) variable self-initialization
> can lead to undefined behavior. In this case, it is just obscure code.
>
> Signed-off-by: Maksym Planeta <mplaneta@xxxxxxxxxxxxxxxxxxxx>
> ---
>  drivers/infiniband/sw/rxe/rxe_comp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/infiniband/sw/rxe/rxe_comp.c b/drivers/infiniband/sw/rxe/rxe_comp.c
> index 00eb99d3df86..116cafc9afcf 100644
> --- a/drivers/infiniband/sw/rxe/rxe_comp.c
> +++ b/drivers/infiniband/sw/rxe/rxe_comp.c
> @@ -558,7 +558,7 @@ int rxe_completer(void *arg)
>  {
>  	struct rxe_qp *qp = (struct rxe_qp *)arg;
>  	struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
> -	struct rxe_send_wqe *wqe = wqe;
> +	struct rxe_send_wqe *wqe = NULL;

This can't work, for example call to do_read() will crash the system,
due to pointer dereference.

>  	struct sk_buff *skb = NULL;
>  	struct rxe_pkt_info *pkt = NULL;
>  	enum comp_state state;
> --
> 2.20.1
>



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