netdev - ep93xx_eth stopps receiving packages

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-next>] [day] [month] [year] [list]

Message-ID: <20100419173813.7750395f4fkkmrk0@limpopo.deheime.ch>
Date:	Mon, 19 Apr 2010 17:38:13 +0200
From:	Stefan Agner <stefan@...er.ch>
To:	netdev@...r.kernel.org
Cc:	buytenh@...tstofly.org
Subject: ep93xx_eth stopps receiving packages

Hello,

I'm using Linux 2.6.32.9 on a technologic systems TS-7250 SBC board, with
the ep93xx_eth driver for networking. On three identical, but independent
systems I noted that the system is unreachable after a while. On a serial
terminal I noted that only the TX counter counts onward, RX stays where it is,
no matter if i try to ping from or to the system. Wireshark tells me exactly
that too: I see helpless ARP requests which gets answered, but no ICMP. The
system doesnt receive the ARP requests, and just sends another one.
With a simple program which sends small packages in a fast pace I can
reproduce the problem after several seconds (additional CPU load seem to
provoke the problem even more). Remove and replug the network cable doesn't
solve the problem, but ifup/down does. I don't see any messages in dmesg,
memory is still available.

Is it a network driver problem or even a network stack problem?

It looks to me like a race condition in the network driver, which can be
triggered by short packets.

What can I do to track the problem further down?

Thanks for hints,
Stefan

----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.

--
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