r269147: NULL mp in getnewvnode() via kern_proc_filedesc_out()

Has anyone else encountered this? Got it while running poudriere.

> NULL mp in getnewvnode()
> [...]
> vn_fullpath1() at vn_fullpath1+0x19d/frame 0xfffffe1247d8e540
> vn_fullpath() at vn_fullpath+0xc1/frame 0xfffffe1247d8e590
> export_fd_to_sb() at export_fd_to_sb+0x489/frame 0xfffffe1247d8e7c0
> kern_proc_filedesc_out() at kern_proc_filedesc_out+0x234/frame 0xfffffe1247d8e840
> sysctl_kern_proc_filedesc() at sysctl_kern_proc_filedesc+0x84/frame 0xfffffe1247d8e900
> sysctl_root_handler_locked() at sysctl_root_handler_locked+0x68/frame 0xfffffe1247d8e940
> sysctl_root() at sysctl_root+0x18e/frame 0xfffffe1247d8e990
> userland_sysctl() at userland_sysctl+0x192/frame 0xfffffe1247d8ea30
> sys___sysctl() at sys___sysctl+0x74/frame 0xfffffe1247d8eae0
> amd64_syscall() at amd64_syscall+0x25a/frame 0xfffffe1247d8ebf0
> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe1247d8ebf0

Unfortunately I have no dump as the kmem was too large compared to my 
swap, and I didn't get to the console before some of the text was 
overwritten. Perhaps it will hit it again soon after reboot and I'll get 
a core.

-- 
Regards,
Bryan Drewery