bin/51052: NFS client has no timeout set if connection hangs

[schaiba%gmail.com@localhost]

>Number:         51052
>Category:       bin
>Synopsis:       NFS client has no timeout set if connection hangs
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Apr 06 09:10:00 +0000 2016
>Originator:     Rares
>Release:        7.0-RELEASE amd64
>Organization:
>Environment:
>Description:
I have a Oracle Linux 7.2 NFS server. FreeBSD, Linux, Solaris and Windows Server 2012R2 can mount the share just fine. However, NetBSD (and OpenBSD 5.9) will hang indefinitely after issuing the mount command. The command is 'mount_nfs $host:$share $mntpoint'. In the end I found that it was a firewall issue on the server, so once I disabled it the mount command worked. Issue is, the process entered a D state and remained that way (left it for about 20 hours.)

crash output : 

https://dpaste.de/my2T
>How-To-Repeat:
 - try to mount a Linux NFS share that for various reasons rejects the data request from the NetBSD client
 
>Fix: