Re: Socket troubles: Too many open files

[David Fifield <david () bamsoftware com>]

On Fri, Sep 14, 2012 at 08:36:16AM -0700, David Fifield wrote:
> On Thu, Sep 13, 2012 at 04:43:28PM -0500, Christopher Clements wrote:
> > nmap -A -sSUCV --script '(discovery or default or safe)' T:1-65535,U:(top
> > 75 UDP ports)  --reason --open -oA nmap-output <targets>
> >
> > I'm afraid I didn't look at the scan phase it was on (had kicked off the
> > scan and went home for the night).
>
> I'm guessing this has the same cause as the error messages reported by
> starlight,
>
> http://seclists.org/nmap-dev/2012/q3/889
> http://seclists.org/nmap-dev/2012/q3/att-889/nmap_crash4.txt
>
> The log has the same "Too many open files" message appear during the
> script scanning phase.

FYI, I'm now able to reproduce this against localhost using the attached
scapy script and a firewall rule to block the OS from sending RSTs. The
scapy script just replies to a SYN on any port with a SYN/ACK.

./nmap -Pn localhost -d -sV -sC
Socket troubles: Too many open files
Socket troubles: Too many open files
nmap: nsock_core.c:1187: nsp_add_event: Assertion `nse->iod->sd >= 0' failed.
Aborted

David Fifield

Attachment: syn.py
Description:

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