netdev - Re: [net PATCH V2] net: fix divide by zero in tcp algorithm illinois

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: <1351703678.32673.414.camel@edumazet-glaptop>
Date:	Wed, 31 Oct 2012 18:14:38 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Jesper Dangaard Brouer <brouer@...hat.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	Petr Matousek <pmatouse@...hat.com>,
	Stephen Hemminger <shemminger@...tta.com>
Subject: Re: [net PATCH V2] net: fix divide by zero in tcp algorithm
 illinois

On Wed, 2012-10-31 at 13:45 +0100, Jesper Dangaard Brouer wrote:
> Reading TCP stats when using TCP Illinois congestion control algorithm
> can cause a divide by zero kernel oops.
> 
> The division by zero occur in tcp_illinois_info() at:
>  do_div(t, ca->cnt_rtt);
> where ca->cnt_rtt can become zero (when rtt_reset is called)
> 

> Cc: Petr Matousek <pmatouse@...hat.com>
> Signed-off-by: Jesper Dangaard Brouer <brouer@...hat.com>
> 
> ---

Acked-by: Eric Dumazet <edumazet@...gle.com>


--
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