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  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:	Thu, 15 Jul 2010 14:05:28 +0200
From:	Eric Dumazet <>
To:	Lennart Schulte <>
Cc:	Ilpo Järvinen <>,
	Tejun Heo <>,
	"David S. Miller" <>,
	lkml <>,
	"" <>,
	"Fehrmann, Henning" <>,
	Carsten Aulbert <>
Subject: Re: oops in tcp_xmit_retransmit_queue() w/ v2.6.32.15

Le jeudi 15 juillet 2010 à 13:58 +0200, Lennart Schulte a écrit :
> I'm testing new reordering algorithms in a virtual testbed, that is the 
> nodes are emulated with xen and all the network parameters can be tuned 
> with queues.
> With one of the algorithms I also got tracebacks which include 
> tcp_xmit_retransmit_queue. It only happens with ACK loss. The kernel 
> version however is 2.6.31.
> When I read this thread I tried the debug patch and got the following:
> [ 2754.413150] NULL head, pkts 0
> [ 2754.413156] Errors caught so far 1
> Hope that is of any help.

Not sure I understand. 

Are you saying you reproduce same tcp_xmit_retransmit_queue()  bug, with
a special tc qdisc/class droppping some ACK frames ?

Could it be some sched problem and incorrect return codes in case of
congestion ?

To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists