Re: nmap: nsock_core.c:294: handle_connect_result: Assertion `0' failed.

["Fabio" <fabio.ped () libero it>]

> On Wed, Apr 29, 2009 at 03:29:20PM +0200, Fabio wrote:
> > When trying to scan some hosts to search for the Conficker virus I get
> > the following assertion. This is nmap 4.85BETA8 compiled from source on
> > a SPARC machine under Linux, gcc 4.0.3.
> >
> > $ ./nmap -p139,445 --script p2p-conficker,smb-os-discovery,smb-check-vulns --script-args checkconficker=1,safe=1 
> > -T4 192.168.29.55
> >
> > Starting Nmap 4.85BETA8 ( http://nmap.org ) at 2009-04-29 15:44 CEST
> > Strange connect error from 192.168.29.55 (42): Operation now in progress
> > nmap: nsock_core.c:294: handle_connect_result: Assertion `0' failed.
> > Aborted
>
> This is a strange error. Errno 42 is ENOMSG, "No message of desired
> type". But perror is printing out the message for EINPROGRESS,
> "Operation now in progress". I suppose it is possible for errno and the
> error code returned by getsockopt to be different in this part of the
> code.
>
> Does this assertion failure happen every time? If so, it would help if
> you could send a packet capture created with tcpdump or a similar tool.

The assertion is 100% reproducible with that host. A packet capture (with tcpdump -vvv) is attached.


> Another thing is to try "make distclean" and rebuilding. Recently there
> were some problems with builds being out of sync in the nsock directory.

I tried it but I am still getting the same error. I also verified I get the same error on a x86 machine with that host.

Attachment: dump.txt
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