[lwip-devel] [bug #16390] Crash through adding and removing tcb's to the TIME_WAIT list

[anonymous]

URL:
  <http://savannah.nongnu.org/bugs/?func=detailitem&item_id=16390>

                 Summary: Crash through adding and removing tcb's to the
TIME_WAIT list 
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: None
            Submitted on: Donnerstag 20.04.2006 um 04:22 UTC
                Category: TCP
                Severity: 3 - Normal
              Item Group: Crash Error
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open

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Details:

I had a problem when I did a heavy load test on a webserver with a
multitasking os I programmed. The program hangs in the tcp_input function
where it looks in the TIMED_WAIT list for connection that might get data now.
Once there was only one tcp in the list and the ->next pointer was pointing to
the tcp itselfe. An other time there were two connections in the list and the
last points to the first.

If I alter the last ->next to NULL in the list with my debugger it runs
again.

I am not shure how to solve. I surrounded them with sys_arch_protect and
-unprotect but the problem didn't went away. It comes up not as often as
before but it is till there.



 






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