panic: general protection fault from uipc_sockaddr+0x4c

[Mark Johnston]

On Tue, Dec 08, 2020 at 09:39:05AM -0600, Kyle Evans wrote:
> On Tue, Dec 8, 2020 at 9:30 AM Mark Johnston <markj at freebsd.org> wrote:
> > kern_proc_filedesc_out() holds the fdtable shared lock thoughout all of
> > this, which is supposed to prevent the table entry from being freed
> > since that requires the exclusive lock.
> >
> 
> export_file_to_sb drops the lock without it or kern_proc_filedesc_out
> holding the file it's about to look at, though.

Yes, but that's after it calls fo_fill_kinfo().  At that point it has
already collected the to-be-exported info in an sbuf.