netdev - Re: [PATCH] tcp FRTO: in-order-only "TCP proxy" fragility workaround

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, 21 Sep 2008 00:02:31 -0300
From:	Dâniel Fraga <fragabr@...il.com>
To:	"Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi>
Cc:	David Miller <davem@...emloft.net>, thomas.jarosch@...ra2net.com,
	billfink@...dspring.com, Netdev <netdev@...r.kernel.org>,
	Patrick Hardy <kaber@...sh.net>,
	netfilter-devel@...r.kernel.org, kadlec@...ckhole.kfki.hu
Subject: Re: [PATCH] tcp FRTO: in-order-only "TCP proxy" fragility
 workaround

On Fri, 19 Sep 2008 00:04:23 +0300 (EEST)
"Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi> wrote:

> Anyway, if/when you succeed collecting some strace of the server 
> processes, please let me know (though putting a full one available might 
> not be wise thing like I said earlier). After I thought it a bit, it might 
> be enough the start the strace with -p for all server processes of a 
> service during a stall and then resolve it after some amount of waiting 
> with nmap (and hope that strace doesn't resolve it by interfering 
> something relevant :-), you will see that from the fact that it resolves 
> without nmap then). That would probably reveal if the processes where 
> waiting in accept() or not, and if not, where they were.

	I got a stall, tried to use strace but even strace couldn't
trace nothing. Everything which uses some kind of network connection is
stalled (or because everything is stalled, strace couldn't trace
anything).
	
	I'll try to leave strace running all the time, but I'm afraid
it could prevent the stall. Anyway, I'll test and return soon.


-- 
--
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