netdev - Re: [PATCH] cxgb3: enhance t3_l2t_update to catch netevents in whicharp entries have their probe timer expire

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]

Date:	Thu, 13 Mar 2008 00:02:45 -0700
From:	Divy Le Ray <divy@...lsio.com>
To:	Neil Horman <nhorman@...driver.com>
CC:	agospoda@...hat.com, davem@...emloft.net, netdev@...r.kernel.org,
	jeff@...zik.org
Subject: Re: [PATCH] cxgb3: enhance t3_l2t_update to catch netevents in whicharp
 entries have their probe timer expire

Neil Horman wrote:
>
> Recently commit 4eb61e0231be536d8116457b67b3e447bbd510dc went in to 
> handle arp
> completion events in the cxgb driver.  This was done to catch arp 
> events for
> which the corresponding entry was marked stale.  This was done to 
> prevent RDMA
> connection failures.  However the preceding patch misses a case.  
> While checking
> for NUD_STALE states allows the processing of arp entries that were 
> completed
> due to arp requests rather than arp replies, it fails to catch arp 
> entries that
> have had their probe timer expire (NUD_PROBE).  It seems the same 
> failure can
> occur in that case.  By changing the check from NUD_CONNECTED|NUD_STALE to
> NUD_VALID, we can catch the previous set of events and add 
> exprired/revalidated
> arp entries to the set of handled cases as well.
>

Hi Neil,

I don't see transitions to NUD_PROBE triggering netevent notifications.
This patch would not alter the current behaviour.
The idea behind the implementation is that NUD_PROBE is considered as
an intermediate state rather than indicating a completion.

I'm inclined to NAK the patch.

Cheers,
Divy


--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html