[lwip-devel] [bug #36840] snmp_send_trap() NULL de-reference if traps configured but no interfaces available

[James Smith]

URL:
  <http://savannah.nongnu.org/bugs/?36840>

                 Summary: snmp_send_trap() NULL de-reference if traps
configured but no interfaces available
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: rallysmith
            Submitted on: Fri 13 Jul 2012 01:12:18 PM GMT
                Category: None
                Severity: 3 - Normal
              Item Group: Crash Error
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

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Details:

The snmp_send_trap() does a ip_route() call, but does not check the resulting
interface pointer.

I have attached a simple patch to fix the NULL de-reference when snmp_init()
is called (with traps already configured as described in "doc/snmp_agent.txt")
but where no network interfaces are available.




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File Attachments:


-------------------------------------------------------
Date: Fri 13 Jul 2012 01:12:18 PM GMT  Name: snmp_send_trap.patch  Size: 788B 
 By: rallysmith

<http://savannah.nongnu.org/bugs/download.php?file_id=26196>

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