netdev - Re: dst_ifdown breaks infiniband?

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:	Sun, 18 Mar 2007 22:33:45 +0200
From:	"Michael S. Tsirkin" <mst@....mellanox.co.il>
To:	Alexey Kuznetsov <kuznet@....inr.ac.ru>
Cc:	"Michael S. Tsirkin" <mst@....mellanox.co.il>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	netdev@...r.kernel.org, general@...ts.openfabrics.org,
	Roland Dreier <rolandd@...co.com>
Subject: Re: dst_ifdown breaks infiniband?

Quoting Alexey Kuznetsov <kuznet@....inr.ac.ru>:
Subject: Re: dst_ifdown breaks infiniband?
> > Can dst->neighbour be changed to point to NULL instead, and the neighbour
> > released?
> 
> It should be cleared and we should be sure it will not be destroyed
> before quiescent state.
> 
> Seems, this is the only correct solution, but to do this we have
> to audit all the places where dst->neighbour is dereferenced for
> RCU safety.
> 
> Actually, it is very good you caught this eventually, the bug was
> so _disgusting_ that it was "forgotten" all the time, waiting for
> someone who will point out that the king is naked. :-)

Actually that might not be too bad:
$grep -rIi 'dst->neighbour' net/ | wc -l
36

I'll try to do it.

-- 
MST
-
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