linux-kernel - RE: [PATCH v3 10/28] IB/Verbs: Reform cm related part in IB-core cma

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1828884A29C6694DAF28B7E6B8A82373A8FC0ACF@ORSMSX109.amr.corp.intel.com>
Date:	Mon, 13 Apr 2015 19:25:48 +0000
From:	"Hefty, Sean" <sean.hefty@...el.com>
To:	Michael Wang <yun.wang@...fitbricks.com>,
	Roland Dreier <roland@...nel.org>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	"linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	Tom Tucker <tom@...ngridcomputing.com>,
	Steve Wise <swise@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	infinipath <infinipath@...el.com>, Eli Cohen <eli@...lanox.com>,
	"Latif, Faisal" <faisal.latif@...el.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>,
	"Weiny, Ira" <ira.weiny@...el.com>, Tom Talpey <tom@...pey.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Doug Ledford <dledford@...hat.com>
Subject: RE: [PATCH v3 10/28] IB/Verbs: Reform cm related part in IB-core cma

> @@ -1037,17 +1033,13 @@ void rdma_destroy_id(struct rdma_cm_id *id)
>  	mutex_unlock(&id_priv->handler_mutex);
> 
>  	if (id_priv->cma_dev) {
> -		switch (rdma_node_get_transport(id_priv->id.device-
> >node_type)) {
> -		case RDMA_TRANSPORT_IB:
> +		if (rdma_ib_or_iboe(id_priv->id.device, id_priv->id.port_num))

A listen id can be associated with a device without being associated with a port (see the listen_any_list).  Some other check is needed to handle this case.  I guess the code could check the first port on the device (replace port_num with hardcoded value 1).  Then we wouldn't be any more broken than the code already is.  (The 'break' is conceptual, not practical.)

This appears to be highlighting an architectural flaw in the iboe integration.

> {
>  			if (id_priv->cm_id.ib)
>  				ib_destroy_cm_id(id_priv->cm_id.ib);
> -			break;
> -		case RDMA_TRANSPORT_IWARP:
> +		} else if (rdma_tech_iwarp(id_priv->id.device,
> +					   id_priv->id.port_num)) {
>  			if (id_priv->cm_id.iw)
>  				iw_destroy_cm_id(id_priv->cm_id.iw);
> -			break;
> -		default:
> -			break;
>  		}
>  		cma_leave_mc_groups(id_priv);
>  		cma_release_dev(id_priv);

 - Sean