Re: Assertion failure in nsock_core

[Joao Correa <joao () livewire com br>]

On Mon, Jul 13, 2009 at 2:34 PM, David Fifield<david () bamsoftware com> wrote:
> On Mon, Jul 13, 2009 at 01:31:51PM -0300, Joao Correa wrote:
> > I'm going through a similar problem here. I've tested it on two
> > different systems:
> >
> > Ubuntu Linux:
> > ==============================
> >
> > lvwr@ubuntu:~$ nmap scanme.nmap.com -p80
> >
> > Starting Nmap 4.90RC2 ( http://nmap.org ) at 2009-07-07 07:57 BRT
> > nmap: nsock_core.c:139: socket_count_zero: Assertion
> > `iod->events_pending == 1' failed.
> > Aborted
> > lvwr@ubuntu:~$ uname -rv
> > 2.6.28-13-generic #45-Ubuntu SMP Tue Jun 30 19:49:51 UTC 2009
>
> I can reproduce the reverse DNS assertion failure. I have a fix but I
> want to check a few other things out first. I don't know what might have
> caused the ping failure that Andrew described.
David,

Here follows information for a similar situation as reported by
Andrew. The following output was obtained from running nmap on the
same ubuntu machine above.

=====

lvwr@ubuntu:~/repos/nmap$ ping scanme.nmap.org -c1
PING scanme.nmap.org (64.13.134.52) 56(84) bytes of data.
64 bytes from scanme.nmap.org (64.13.134.52): icmp_seq=1 ttl=47 time=238 ms

--- scanme.nmap.org ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 238.725/238.725/238.725/0.000 ms
lvwr@ubuntu:~/repos/nmap$ nmap 64.13.134.52 -p80

Starting Nmap 4.90RC2 ( http://nmap.org ) at 2009-07-07 10:06 BRT
nmap: nsock_core.c:139: socket_count_zero: Assertion
`iod->events_pending == 1' failed.
Aborted
lvwr@ubuntu:~/repos/nmap$ nmap 64.13.134.52 -p80 -PN

Starting Nmap 4.90RC2 ( http://nmap.org ) at 2009-07-07 10:06 BRT
nmap: nsock_core.c:139: socket_count_zero: Assertion
`iod->events_pending == 1' failed.
Aborted
lvwr@ubuntu:~/repos/nmap$ nmap 64.13.134.52 -sP

Starting Nmap 4.90RC2 ( http://nmap.org ) at 2009-07-07 10:06 BRT
nmap: nsock_core.c:139: socket_count_zero: Assertion
`iod->events_pending == 1' failed.
Aborted
lvwr@ubuntu:~/repos/nmap$

> David Fifield
>
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