SNMPD crash

Hello!

I use net-snmp-5.3.0.1-1.EL4 with dynamic module.
We performed some load test and after 10 hours snmpd had crashed.
Below you may see back trace from the core.
I would like to mention that load test sends exactly same trap (i.e. the
payload of snmp packet exactly same).
I saw that snmp_oid_compare doesn't comare whether it receives NULL
pointers or wrong sizes and I understand that snmpd crashed since wrong
input.

Do you have any ideas?


Thanks ahead, Vlad.

P.S 
I found the problem for crash from my previous letter.
It happened also in load test in multithreading environment.
The problem was fixed by synchronization of trap sending.


   



  
snmp_oid_compare (in_name1=0x0, len1=9, in_name2=0x0, len2=9) at
snmp_api.c:6313

6313            if (*(name1) != *(name2)) {

(gdb) bt

#0  snmp_oid_compare (in_name1=0x0, len1=9, in_name2=0x0, len2=9) at
snmp_api.c:6313

#1  0x008ac085 in netsnmp_notif_log_remove_oldest (count=1) at
notification-log-mib/notification_log.c:68

#2  0x008ac645 in check_log_size (clientreg=0, clientarg=0x0) at
notification-log-mib/notification_log.c:121

#3  0x008adb7a in log_notification (pdu=0xadffa38, transport=0x0) at
notification-log-mib/notification_log.c:703

#4  0x008a9457 in send_notifications (major=1, minor=7,
serverarg=0xadffa38, clientarg=0x0)

    at notification/snmpNotifyTable.c:260

#5  0x001c83b4 in snmp_call_callbacks (major=1, minor=7,
caller_arg=0xadffa38) at callback.c:323

#6  0x003565de in netsnmp_send_traps (trap=-1, specific=-1,
enterprise=0x3750a0, enterprise_length=10, vars=0xb8026b0,

    context=0x0, flags=0) at agent_trap.c:790

#7  0x003567b3 in send_enterprise_trap_vars (trap=-1, specific=-1,
enterprise=0x3750a0, enterprise_length=10,

    vars=0xb8026b0) at agent_trap.c:804

#8  0x003567ea in send_trap_vars (trap=8, specific=0, vars=0x9) at
agent_trap.c:902

#9  0x00356857 in send_v2trap (vars=0xb8026b0) at agent_trap.c:961

#10 0x004d3817 in snmp_server::process_send_trap (this=0x5806c0,
p_trap=@0x582a64)

    at /home/keren/snmp/src/snmp_os/snmp_server.cpp:385

#11 0x004cf74a in snmp_server::receive_message (this=0x5806c0,
l_msg=@0x582a64)

    at /home/keren/snmp/src/snmp_os/snmp_server.cpp:132

#12 0x004d0d0e in c_pipe_server::read_and_echo (this=0x5820dc,
insock=14, index=1) at os_pipe.h:1006

#13 0x004d0b57 in c_pipe_server::accept_and_read (this=0x5820dc,
l_nfds=1, m_ret_e_poll_fds=0x5821d8) at os_pipe.h:977

#14 0x004d07c1 in c_pipe_server::read_pack (this=0x5820dc) at
os_pipe.h:894

#15 0x004cf292 in snmp_server::process (this=0x5806c0) at
/home/keren/snmp/src/snmp_os/snmp_server.cpp:93

#16 0x004b0b84 in run_thread (objPtr=0x5806c0) at
/home/keren/snmp/src/snmp_os/os_snmp.cpp:124

#17 0x00b2a3ae in start_thread () from /lib/tls/libpthread.so.0

#18 0x0043caee in clone () from /lib/tls/libc.so.6



 
 
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