Stuck CLOSED sockets / sshd / zombies...

[John Baldwin]

On Thursday, April 03, 2014 3:38:39 pm Karl Pielorz wrote:
> 
> --On 3 April 2014 12:32:16 -0400 John Baldwin <jhb at freebsd.org> wrote:
> 
> >> "
> >> USER   CMD     PID  FD MOUNT  INUM MODE         SZ|DV R/W
> >> root   sshd   4346   8* local stream fffff80002e55c30 <->
> >> fffff80002e552d0 ...
> >> root   sshd   4344   4* local stream fffff80002e552d0 <->
> >> fffff80002e55c30 "
> >
> > Right, so it's just blocked on a UNIX domain socket from the parent
> > waiting for the parent to tell it to do something.  The root issue is the
> > parent (as I feared).  Is 4344 threaded (procstat -t?)
> 
> "
> # procstat -t 4344
>   PID    TID COMM             TDNAME           CPU  PRI STATE   WCHAN
>  4344 100068 sshd             -                  0  120 sleep   urdlck
> "

That's really odd.  A single threaded program has no business even trying
to grab a lock.  Is your sshd even linked against libthr via ldd?

-- 
John Baldwin