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:	Thu, 6 Dec 2007 19:44:26 +0100
From:	Francois Romieu <romieu@...zoreil.com>
To:	Holger Hoffstaette <holger@...ards.de>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	torvalds@...ux-foundation.org
Subject: Re: Reproducible data corruption with sendfile+vsftp - splice
	regression?

Holger Hoffstaette <holger@...ards.de> :
[...]
> Maybe turning off sendfile or NAPI just lead to random success - so far it
> really looks like tso on the r8169 is the common cause.

TSO on the r8169 is the magic switch but the regression makes imvho more
sense from a VM pov:

- the corrupted file has the same size as the expected file
- the corrupted file exhibits holes which come as a multiple of 4096 bytes
  (8*4k, 2 places, there may be more)
- the r8169 driver does not know what a page is
- the 8169 hardware has a small 8192 bytes Tx buffer

It would be nice if someone could do a sendfile + vsftp test with TSO on a
different hardware. While I could not reproduce the corruption when simply
downloading a file that I had copied on the server with scp, it triggered
almost immediately after I copied it locally and tried to download the copy.

-- 
Ueimor
--
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

Powered by blists - more mailing lists