kern/92785: Using exported filesystem on OS/2 NFS client causes filesystem freeze

[Ulrich Spoerlein]

The following reply was made to PR kern/92785; it has been noted by GNATS.

From: "Ulrich Spoerlein" <uspoerlein at gmail.com>
To: "Kostik Belousov" <kostikbel at gmail.com>
Cc: stable at freebsd.org, bug-followup at freebsd.org
Subject: Re: kern/92785: Using exported filesystem on OS/2 NFS client causes filesystem freeze
Date: Fri, 15 Dec 2006 15:12:58 +0100

 On 12/15/06, Kostik Belousov <kostikbel at gmail.com> wrote:
 > This looks like lock leak in nfsd. Could you supply the tcpdump of the
 > session that causes the problem ? Also, it would be very helpful if you could
 > note exact rpc that wedges the server.
 
 That would have been my next step. I ran only rpcbind, nfsd and mountd
 on the file server (no rpc.lockd/rpc.statd). I then had an OS/2 Client
 mount the filesystem, issue a readdir and then tried to mount the same
 share from an Linux client. This last mount request never came back,
 immediately after issueing the mount request the mountd got stuck in
 state 'ufs' as shown in the backtrace.
 
 A tcpdump of the session can be found at:
 http://coyote.dnsalias.net/rpc.pcap (9kB)
 
 Uli
 
 PS: Please trim the Email when responding to the GNATS DB as that
 makes the PR-Trail rather unreadable. Thanks!