[Freeipmi-devel] [bug #49813] libfreeipmi crashes when using multithreading >1024 threads

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?49813>

                 Summary: libfreeipmi crashes when using multithreading >1024
threads
                 Project: GNU FreeIPMI
            Submitted by: None
            Submitted on: Fri 09 Dec 2016 03:31:23 PM UTC
                Category: libfreeipmi
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Crash
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

the _api_lan_recvfrom uses the select() function to receive data from the
network. select() uses FD_SET to write into the file-descriptors. Stupidly,
the maximum count of fd's, select() can use is 1024. If you use a
multithreaded program with libfreeipmi with more than 1024 calls (in my case:
1600threads) then often the program crashes with stack-smashing errors.

Replacing the select() call in the _api_lan_recvfrom by poll() solves the
problem.


attached files: my version of the c-file which is running fine with
multithreading



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File Attachments:


-------------------------------------------------------
Date: Fri 09 Dec 2016 03:31:23 PM UTC  Name: ipmi-lan-session-common.c  Size:
148kB   By: None

<http://savannah.gnu.org/bugs/download.php?file_id=39185>

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