Re: snmpd seg faults on AIX

On Mon, Jan 11, 2010 at 1:37 PM, Fulko Hew <[email protected]> wrote:

> On Mon, Jan 11, 2010 at 11:48 AM, Fulko Hew <[email protected]> wrote:
>
>> On Mon, Jan 11, 2010 at 11:30 AM, Dave Shield <[email protected]
>> > wrote:
>>
>>> 2010/1/11 Fulko Hew <[email protected]>:
>>>
>>
> ... snip ...
>
> So the problem is in  the handling of  ipAddrTable and ipRouteTable...
>
> now what?
>
>
>
>> I'll look at that part of the code while I wait for feedback
>
> but I'm afraid I'm out of my expertise in Net-SNMP source code
>> and/or AIX kernel structures.  :-(
>>
>
> For what its worth, here is the debug trace of what I think is the relevant
> portion,
> (when I did a getnext(ipAddrTable), but I don't know where to look next, or
> go from here.
>

And here is a gdb backtrace (once I got gdb onto the system) to go along
with the previous dump.

gdb) backtrace
#0  0xd0387af0 in write () from /usr/lib/libc.a(shr.o)
#1  0xd037eba8 in _xwrite () from /usr/lib/libc.a(shr.o)
#2  0xd037d82c in fwrite_unlocked () from /usr/lib/libc.a(shr.o)
#3  0xd037dab0 in fwrite_5_4 () from /usr/lib/libc.a(shr.o)
#4  0xd0377764 in _doprnt () from /usr/lib/libc.a(shr.o)
#5  0xd0375594 in fprintf () from /usr/lib/libc.a(shr.o)
#6  0xd0a7370c in log_handler_stdouterr (logh=0x20009948, pri=770849484,
str=0x2df23acc "trac\e: ") at snmp_logging.c:986
#7  0xd0a73d10 in snmp_log_string (priority=7, str=0x2df23acc "trac\e: ") at
snmp_logging.c:1171
#8  0xd0a73e70 in snmp_vlog (priority=7, format=0xd0aed0cc "%s: ",
ap=0x2df23f80 "Ц<") at snmp_logging.c:1237
#9  0xd0a71800 in debugmsg (token=0x2 "", format=0xd0aed0cc "%s: ") at
snmp_debug.c:257
#10 0xd0a71864 in debugmsgtoken (token=0x2 "", format=0x2df23acc "trac\e: ")
at snmp_debug.c:439
#11 0xd0a54930 in klookup (off=3500555288, target=0x2df24068 "", siz=24) at
kernel.c:196
#12 0xd09a9de8 in load_rtentries (pt=0x0) at mibII/var_route.c:885

... lots of redundant duplicates omitted ...

#51108 0xd09a9e08 in load_rtentries (pt=0x0) at mibII/var_route.c:890
#51109 0xd09a9e08 in load_rtentries (pt=0x0) at mibII/var_route.c:890
#51110 0xd09a9e08 in load_rtentries (pt=0x0) at mibII/var_route.c:890
#51111 0xd09aa2f4 in Route_Scan_Reload () at mibII/var_route.c:1077
#51112 0xd09aa454 in var_ipRouteEntry (vp=0x2ff1c4f4, name=0x2ff1c2f4,
length=0x2ff1c0f0,
                                       exact=0,
                                       var_len=0x2ff1c0ec,
write_method=0x653a2000) at mibII/var_route.c:498
#51113 0xd0ca09dc in netsnmp_old_api_helper (handler=0x2,
                                             reginfo=0x2001bfd8,
reqinfo=0x2012d278, requests=0x2012fa68) at old_api.c:291
#51114 0xd0a32ec8 in netsnmp_call_handlers (reginfo=0x2001bfd8,
reqinfo=0x2012d278, requests=0x2012fa68) at agent_handler.c:440
#51115 0xd0a38964 in handle_var_requests (asp=0x2012f808) at
snmp_agent.c:2611
#51116 0xd0a39f74 in handle_getnext_loop (asp=0x2012f808) at
snmp_agent.c:3051
#51117 0xd0a3d2ec in netsnmp_handle_request (asp=0x2012f808, status=0) at
snmp_agent.c:3203
#51118 0xd0a3d7dc in handle_snmp_packet (op=2, session=0x2df23acc,reqid=7,
pdu=0x2012f808, magic=0x2) at snmp_agent.c:1929
#51119 0xd0aaa340 in _sess_process_packet (sessp=0x2012c788, sp=0x201394c8,
isp=0x2012c958, transport=0xd0af30e0, opaque=0x1,
                                           olength=538132936,
packetptr=0x20158fd8 "0(\002\001", length=42) at snmp_api.c:5604
#51120 0xd0aab9a4 in _sess_read (sessp=0x2012c788, fdset=0x2ff1cb98) at
snmp_api.c:6043
#51121 0xd0aac3cc in snmp_sess_read2 (sessp=0x2012c788,
fdset=0x2df23acc) at snmp_api.c:6075
#51122 0xd0aac520 in snmp_read2 (fdset=0xd0a71800) at snmp_api.c:5667
#51123 0x100023e4 in main (argc=-264803712, argv=0x20001b98) at snmpd.c:1221

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