linux-kernel - Re: [PATCH] net: delete expired route in ip6_pmtu

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] [day] [month] [year] [list]

Message-Id: <20101216.122855.48497491.davem@davemloft.net>
Date:	Thu, 16 Dec 2010 12:28:55 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	avagin@...nvz.org
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: delete expired route in ip6_pmtu_deliver

From: Andrey Vagin <avagin@...nvz.org>
Date: Sun, 12 Dec 2010 04:20:11 +0300

> The first big packets sent to a "low-MTU" client correctly
> triggers the creation of a temporary route containing the reduced MTU.
> 
> But after the temporary route has expired, new ICMP6 "packet too big"
> will be sent, rt6_pmtu_discovery will find the previous EXPIRED route
> check that its mtu isn't bigger then in icmp packet and do nothing
> before the temporary route will not deleted by gc.
> 
> I make the simple experiment:
> while :; do
>     time ( dd if=/dev/zero bs=10K count=1 | ssh hostname dd of=/dev/null ) || break;
> done
> 
> The "time" reports real 0m0.197s if a temporary route isn't expired, but
> it reports real 0m52.837s (!!!!) immediately after a temporare route has
> expired.
> 
> Signed-off-by: Andrey Vagin <avagin@...nvz.org>

Applied and queued up for -stable, thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/