kern/141289: newnfs panic "nfs sent cache" with IPv6

[Petr Lampa]

>Number:         141289
>Category:       kern
>Synopsis:       newnfs panic "nfs sent cache" with IPv6
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Dec 08 16:30:06 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator:     Petr Lampa
>Release:        8.0-STABLE
>Organization:
FIT BUT
>Environment:
FreeBSD 8.0-STABLE FreeBSD 8.0-STABLE #4: Tue Dec  8 15:49:48 CET 2009     root@:/usr/src/sys/i386/compile/XXX i386
>Description:
If newnfs server is accessed using IPv6, it immediately panics with "nfs sent cache". The reason is missing AF_INET6 check at line 526 in fs/nfsserver/nfs_nfsdcache.c:

                 if (so->so_proto->pr_domain->dom_family != AF_INET ||
                    so->so_proto->pr_protocol != IPPROTO_TCP)
                        panic("nfs sent cache");

>How-To-Repeat:
Mount NFSv4 using IPv6 and newnfs server.
>Fix:
Change the line 526-527 sys/fs/nfsserver/nfs_nfsdcache.c to:

                if ((so->so_proto->pr_domain->dom_family != AF_INET &&
                    so->so_proto->pr_domain->dom_family != AF_INET6) ||
                    so->so_proto->pr_protocol != IPPROTO_TCP)
                        panic("nfs sent cache");

It works after that.

>Release-Note:
>Audit-Trail:
>Unformatted: