Olaf Kirch wrote:

># Subject: Fix race conditions with file lock vs close
># 
># When a multithreaded application tries to obtain a lock on a remote
># file server (NFS or other), while another thread closes the file, we
># risk oopsing or running into a BUG(). This can happen if the close
># happens inbetween sys_fcntl() grabbing the file pointer, and before
># the call to __posix_lock_file.
># 
># The fix is to change fcntl_setlk* and make them check if the file
># is still open after the lock has been obtained.
># 
># Signed-off-by: Olaf Kirch <okir@suse.de>
>

A different patch was submitted upstream already to address the fcntl/close
race.  It was accepted into the '-mm' kernel on June 28'th.  That patch is
attached.

    Thanx...

       ps