Re: Bug in Parallel DNS resolution in Nmap 4.50?

[doug () hcsw org]

Hi Lionel,

On Mon, Jan 07, 2008 at 10:47:11AM +0100 or thereabouts, Lionel Cons wrote:
> FWIW, I could reproduce it today with the latest Nmap from SVN.

Thanks a lot for taking the time to do this. Unfortunately, it
looks like we will need a bit more info. It seems as though
the nmap binary you used had debug symbols stripped. If you
install with "make install" it will automatically strip the
binary to save disk space. Unstripped binaries give a more
detailed backtrace, including what line number of the file
each frame is executing.

If you get a chance, could you get another backtrace from an
unstripped binary? The easiest way is probably just to re-compile
and then run the scan with the nmap binary in the current directory
before you make install it.

I find the easiest way to tell if a binary is stripped or
not is to use the file command:

$ file ./nmap
nmap: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.0, dynamically linked (uses shared 
libs), not stripped

versus

$ file ./nmap
nmap: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), for GNU/Linux 2.2.0, dynamically linked (uses shared 
libs), stripped

Thanks again for your time!

Doug

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