Nmap Development mailing list archives
Re: 4.22SOC6 Crash With Connect() Scan
From: David Fifield <david () bamsoftware com>
Date: Fri, 14 Sep 2007 14:01:44 -0600
On Fri, Sep 14, 2007 at 12:41:40AM +0200, majek04 wrote:
On 9/13/07, David Fifield <david () bamsoftware com> wrote:On Thu, Sep 13, 2007 at 05:37:24PM +0100, Rob Nicholls wrote:I finally got around to testing the new 4.22SOC6 win32 binary (using the zip file) and spotted that it crashed when I asked it to perform a Connect() Scan.I was able to reproduce this on Windows XP, both the "Unknown error" and the crash. I'll investigate it and let you know what I find. The big change between 4.22SOC5 and 4.22SOC6 was the massping migration, which changes the way host discovery is done. That shouldn't affect port scans, but you never know.I was also able to reproduce this bug. It crashes during connect scan, in scan_engine.cc:3050 in static bool do_one_select_round(UltraScanInfo *USI, struct timeval *stime) [...] for(hostI = USI->incompleteHosts.begin(); hostI != USI->completedHosts.end() && numGoodSD < selectres; hostI++) { [...]
Thanks for this. It helped me find the problem right away. The bug was that the hostI iterator was being used to iterate over two separate lists, which I guess is not allowed, but worked for me on Linux. I've committed a fix. I don't remember seeing the "Unknown error" thing, but from an old checkout it appears to have been around a while. The error code that's being returned is 10035, WSAEWOULDBLOCK, which corresponds to EAGAIN in nbase/nbase_winunix.h, but is not supported by strerror. So it's not a real error, just a little weird from a UI point of view. David Fifield _______________________________________________ Sent through the nmap-dev mailing list http://cgi.insecure.org/mailman/listinfo/nmap-dev Archived at http://SecLists.Org
Current thread:
- 4.22SOC6 Crash With Connect() Scan Rob Nicholls (Sep 13)
- Re: 4.22SOC6 Crash With Connect() Scan David Fifield (Sep 13)
- Re: 4.22SOC6 Crash With Connect() Scan majek04 (Sep 13)
- Re: 4.22SOC6 Crash With Connect() Scan David Fifield (Sep 14)
- Re: 4.22SOC6 Crash With Connect() Scan majek04 (Sep 14)
- Re: 4.22SOC6 Crash With Connect() Scan majek04 (Sep 13)
- Re: 4.22SOC6 Crash With Connect() Scan David Fifield (Sep 13)