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Published 20 hours ago • verified publisher icon mtorromeo

Potential data loss and security breach when used with nfs server

Open petterreinholdtsen opened this issue 8 years ago • 10 comments

In https://bugs.debian.org/807473 there is a report about this driver causing NFS mounts to hand out random or zeroed out file content. Passing the information on here to make more people aware of the problem.

petterreinholdtsen avatar May 10 '16 05:05 petterreinholdtsen

Version 8.042 is out. I would be interested to know if this is still present.

Thanks!

mtorromeo avatar May 13 '16 16:05 mtorromeo

I dont have the original hardware anymore, but i just tried it on another machine and got the same result.

Hark0nnen avatar May 14 '16 10:05 Hark0nnen

Still present with 8.042 and kernel 4.9.13 on Fedora

vesnn avatar Mar 16 '17 14:03 vesnn

@vesnn No luck with 8.044?

sergey-dryabzhinsky avatar Apr 18 '17 04:04 sergey-dryabzhinsky

May be problem not in driver but NFS? http://openwall.com/lists/oss-security/2017/05/02/6

sergey-dryabzhinsky avatar May 05 '17 20:05 sergey-dryabzhinsky

This post is about NFSv3, in my case NFSv4 was used.
Although it is obvious that NFS plays a lead role in this problem. In a situation where filesystem is accessible normally but files content is not the only possible explanation is that NFS tries to shortcut some parts on network subsystem for speed and this driver doesnt like it.

Hark0nnen avatar May 06 '17 00:05 Hark0nnen

With 8.044.2 the problem has mostly gone. The problem still remains with two ASUS MoBo's: M3A78 PRO and another one (I does not have acces to ther second now) with RTL8168/RTL8111 integrated (need to look at the character index at the end of their model number). Attached the lspci log. r8168.txt By the way, the speed is unnormal on that network adapter with r8168 module, as if it negotiates 10 Mb/s speed. I attached also iperf logs with r8169, r8168 (via r8169 and r8168 drivers) and forcedeth networ adaptors at the opposite side. Look at the nonsymmetrical speed at dirrerent traffic directions. iperf-forcedeth.txt iperf-r8168.txt iperf-r8168-r8169.txt iperf-r8169.txt Every iperf log contains logs: first from direct (iperf3 -c) and second from reverse (iperf3 -R -c) tests, wich where run on remote hosts, connected to ASUS MoBo network adaptor through the TP-Link GBE 8 port switch via CAT5E cables.

vesnn avatar Jun 14 '17 15:06 vesnn

Any updates with new drivers? Is it still hurts NFS?

sergey-dryabzhinsky avatar Jul 22 '21 19:07 sergey-dryabzhinsky

Try to use nolapic in grub cmd line. With this option I got working stock r8169 driver on RTL8168/RTL8111 Ethernet rev 03.

ghost avatar Sep 24 '22 14:09 ghost

[ns015]

Try to use nolapic in grub cmd line. With tis option I got working stock r6869 driver on RTL8168/RTL8111 Ethernet rev 03.

Any chance you can tell us how you got the idea to test nolapic and why it should help with this issue?

-- Happy hacking Petter Reinholdtsen

petterreinholdtsen avatar Sep 24 '22 15:09 petterreinholdtsen