linux-kernel - lock held at task exit time

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Message-Id: <1164042065.11790.14.camel@localhost.localdomain>
Date:	Mon, 20 Nov 2006 12:01:05 -0500
From:	Brendan Powers <brendan@...ara.com>
To:	linux-kernel@...r.kernel.org
Subject: lock held at task exit time

Hello, i have a machine that locks up occasionally when trying to
unmount a cifs mount. The program unmounting it uses the umount2 syscall
to do the unmounting. 

I got these messages along with the stack trace in syslog
kernel: note: umount.special[18370] exited with preempt_count 1
kernel: BUG: umount.special/18370, lock held at task exit time!

Does this mean there is a bug in the kernel, or am i doing something
wrong in the umount.special process?

Attached is the full crash log and the source to umount.special

You will need to CC me when replying.

Info:
Machine i386/Xeon
Kernel versions: 2.6.17.11, and 2.6.16.7
Distro: Debian Sarge(3.1)

Any help would be appreciated. 

View attachment "error_log" of type "text/plain" (5785 bytes)

View attachment "main.cpp" of type "text/x-c++src" (489 bytes)