[Bug 227033] [NEW] Netgear WG311v3 causes ndiswrapper socket deadlock

Launchpad Bug Tracker 227033 at bugs.launchpad.net
Mon Jun 23 16:24:22 UTC 2008


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The occurrence of this bug is seemingly random, but happens to me on
average once a day (but twice while writing this).  Effectively, all of
my TCP connections do nothing, and any new programs I start which use
sockets in any way hang until I resolve the problem.

Solving the problem involves making NetworkManager stop the network
connection (usually by telling it to reconnect).  When I do this I get
the following in dmesg:

[15824.027472] ndiswrapper (set_scan:1212): scanning failed (C0000001)
[15824.277080] ndiswrapper (set_essid:59): setting essid failed (C0000001)
[15825.861715] ndiswrapper (set_essid:59): setting essid failed (C0000001)
[15826.111890] ndiswrapper (set_essid:59): setting essid failed (C0000001)

However all of the processes that hung before catch up when I do this.
To regain use of my wireless I have to reload the ndiswrapper module
(rmmod ndiswrapper ; modprobe ndiswrapper).  At this point, everything
is back to normal.

I say that it's anything using sockets because most programs that are
self-contained work fine when in this state, but things that fail to
work tend to be using networking, or GNOME settings daemon (e.g. gnome-
terminal, nautilus), or some other form of socket-based thing (I never
knew sudo used sockets, but apparently it does!).

It took me quite a while to consider the networking to be the problem,
but everything started working again when I killed the network
connection.  I'm thinking maybe this is some kind of deadlock somewhere
to do with socket handling, which only gets resolves when a load of TCP
connections get dropped.  Unfortunately I'm not intimately familiar with
the Linux kernel so I'm not sure where to look.

Uname: Linux iapetus 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 GNU/Linux
Version: Ubuntu 2.6.24-16.30-generic
Using ndiswrapper with "Marvell Technology Group Ltd. 88w8335 [Libertas] 802.11b/g Wireless (rev 03)" device

Let me know what else is needed (I'll attach the usual dmesg and lspci
info).

** Affects: ndiswrapper (Ubuntu)
     Importance: Medium
         Status: Confirmed

-- 
Netgear WG311v3 causes ndiswrapper socket deadlock
https://bugs.launchpad.net/bugs/227033
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