[CRIU] stray unix socket not dumped by the diag module?

[Tycho Andersen]

On Wed, Jul 13, 2016 at 04:53:53PM +0300, Pavel Emelyanov wrote:
> On 07/13/2016 01:42 AM, Tycho Andersen wrote:
> > Hi guys,
> > 
> > I'm getting a,
> > 
> > (00.155898) Error (sk-unix.c:294): sk unix: Unix socket 0x5674 not found
> > 
> > very rarely when dumping containers. This looks to be some kind of
> > unix socket that systemd has open, full log here:
> > 
> > http://paste.ubuntu.com/19219914/
> > 
> > but somehow, this socket didn't get dumped in collect_sockets(). I
> > looked through the kernel code, but it's not obvious to me why a
> > socket would be missing. Any ideas where to start digging?
> 
> I guess it's the same issue as for TCP sockets -- only bind()-ed or auto-bound
> sockets get into the list reported by the kernel.

I see, because they're not in the unix_socket_table I suppose. It
looks like maybe we can get info on these sockets from the diag module
by doing a specific request for them based on their inode number; is
that the right approach?

Tycho