netdev - Re: Problems with /proc/net/tcp6 - possible bug

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:	Sat, 22 Jan 2011 22:40:44 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	PK <runningdoglackey@...oo.com>
Cc:	linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: Problems with /proc/net/tcp6  - possible bug - ipv6

Le samedi 22 janvier 2011 à 22:20 +0100, Eric Dumazet a écrit :
> Le samedi 22 janvier 2011 à 11:42 -0800, PK a écrit :
> > Eric Dumazet wrote:
> > > 
> > > I had some incidents, after hours of testing...
> > >
> > > After following patch, I could not reproduce it.
> > 
> > 
> > Looks like that patch solved the /proc/net/tcp6 problem.  The causal commit was 
> > the one you identified... confirmed with bisect.
> > 
> > These warnings show up when I run the script (or I presume any tcp6 connection 
> > flooder) with /proc/sys/net/tcp/ipv4/tcp_tw_recycle enabled.  There's textual 
> > corruption of the traces a lot of the time.  Here's a sample trace that doesn't 
> > appear to be corrupt.  All the warnings I've seen are from route.c:209, and I 
> > don't see how that would cause memory corruption.
> 
> Thats a different isse, already reported, under investigation.
> 
> David did some changes recently
> 
> http://comments.gmane.org/gmane.linux.network/179874
> 
> 
> 

In my testings, I even have crashes in cleanup_once() if I
enable /proc/sys/net/ipv4/tcp_tw_recycle 



--
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