linux-kernel - Re: [PATCH] tcp: Modify the condition for the first skb to collapse

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: <1371464962.3252.181.camel@edumazet-glaptop>
Date:	Mon, 17 Jun 2013 03:29:22 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Jun Chen <jun.d.chen@...el.com>
Cc:	ycheng@...gle.com, ncardwell@...gle.com, edumazet@...gle.com,
	netdev@...r.kernel.org, Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tcp: Modify the condition for the first skb to collapse

On Mon, 2013-06-17 at 13:29 -0400, Jun Chen wrote:
> > 
> hi,
> When the condition of tcp_win_from_space(skb->truesize) > skb->len is
> true but the before(start, TCP_SKB_CB(skb)->seq) is also true, the final
> condition will be true. The follow line:
> int offset = start - TCP_SKB_CB(skb)->seq;
> BUG_ON(offset < 0);
> this BUG_ON will be triggered.
> 

Really this should never happen, we must track what's happening here.

Are you using a pristine kernel, without any patches ?

Are you able to reproduce this bug in a short amount of time ?

What kind of driver is in use ? (your stack trace was truncated)



--
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/