Running up to date rawhide, I've been having this problem for quite some time but only today was able to spend the time to get a kernel message. Basically, I'd boot rawhide, try to log in, and my machine would lock up. Turns out to be a kernel panic. I have some symlinks to nfs directories in my local home directory which I guess is what is bringing up this bug? System in question is a Dell Precision 650 running up to date rawhide i386.
Created attachment 308343 [details] dmesg info of bug
thanks for the trace. I've been chasing a similar (maybe the same) problem for a few days. I'm working with the upstream NFS developers to try and get more info for them to debug this.
Created attachment 308391 [details] panic while logging in as root
RE previous attachment, same system but logging in as root. No obvious reason for nfs access during login. All nfs filesystems would be automounted only anyway. Looked slightly different than the first so I thought it might help.
Dave, this was fixed with the patch for http://bugzilla.kernel.org/show_bug.cgi?id=10826 right?
I think so. I haven't seen it since applying that patch, so I would assume we're good to go unless it reoccurs.