netdev - Re: debug: nt_conntrack and KVM crash

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: <1264816777.2793.510.camel@tonnant>
Date:	Fri, 29 Jan 2010 20:59:37 -0500
From:	Jon Masters <jonathan@...masters.org>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	netdev <netdev@...r.kernel.org>,
	netfilter-devel <netfilter-devel@...r.kernel.org>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Patrick McHardy <kaber@...sh.net>
Subject: Re: debug: nt_conntrack and KVM crash

On Fri, 2010-01-29 at 20:57 -0500, Jon Masters wrote:

> Ah so I should have realized before but I wasn't looking at valid values
> for the range of the hashtable yet, nf_conntrack_htable_size is getting
> wildly out of whack. It goes from:
> 
> (gdb) print nf_conntrack_hash_rnd
> $1 = 2688505299
> (gdb) print nf_conntrack_htable_size
> $2 = 16384
> 
> nf_conntrack_events: 1
> nf_conntrack_max: 65536
> 
> Shortly after booting, before being NULLed shortly after starting some
> virtual machines (the hash isn't reset, whereas it is recomputed if the
> hashtable is re-initialized after an intentional resizing operation):

I mean the *seed* isn't changed, so I don't think it was resized
intentionally. I wonder where else htable_size is fiddled with.

Jon.


--
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