Snmpd keeps crashing (1.2.3-RELEASE)
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I saw it but I haven't had any time to look into this particular issue further. I'm not sure what, offhand, might cause a GetBulk request and why that seems to make it keel over.
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I haven't seen anything else with bsnmpd crashing, but I did find that if you have net-snmp installed you should also have two programs that may help diagnose: snmpbulkget and snmpbulkwalk
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To clarify, does that mean I should have those installed on the pfSense box or on the machine I'm making the requests from?
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The snmp client machine, from which the requests originate.
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Not sure if this will make a difference, but I have had to use SNMP v1 to properly connect to my pfSense boxes. When using version 2 (or 2c), Cacti could not read data properly from my pfSense boxes.
Can you tell Nagios to use "v1" instead of v2" when communicating with your pfSense box?
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After some cursory probing with snmpbulkget and snmpbulkwalk from the server, I have no issues running the commands. Bsnmpd responds promptly with data. Working within the context of the Nagios implimentation, I fired off a walk request that produced this:
SNMPv2-SMI::enterprises.12325.1.200.1.9.2.1.20.6 = Counter64: 0
SNMPv2-SMI::enterprises.12325.1.200.1.9.2.1.20.7 = Counter64: 0
SNMPv2-SMI::enterprises.12325.1.200.1.9.2.1.20.8 = Counter64: 0
SNMPv2-SMI::enterprises.12325.1.200.1.9.2.1.20.9 = Counter64: 0
SNMPv2-SMI::enterprises.12325.1.200.1.9.2.1.20.10 = Counter64: 0
SNMPv2-SMI::enterprises.12325.1.200.1.9.2.1.20.11 = Counter64: 0
SNMPv2-SMI::enterprises.12325.1.200.1.9.2.1.20.12 = Counter64: 0
Error in packet.
Connection terminated by remote hostAfter this message, no further attempts to request data were possible from Nagios, even though I can snmpbulkwalk from the command line successfully. Any attempts to query the interfaces from Nagios fails and brings down the daemon with this error in the logs.
kernel: pid 58616 (bsnmpd), uid 0: exited on signal 11 (core dumped)
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Hi,
I've also had this problem and I found that bsmnpd crashes when the "max-repetitions field in the GETBULK PDUs" (man snmpbulkwalk) value is greater than 100 on the "if" subtree.
Test this (on a linux system):snmpbulkwalk -Cr100 -v 2c -c public 192.168.154.1 if(should work) against this:
snmpbulkwalk -Cr101 -v 2c -c public 192.168.154.1 if(should crash).
Our (providers) Nagios sent 340 in this field, I see from the logs that Briantists even sent 1115 (M=1115). Can this be fixed for 1.2.3 or at least double-checked for 2.0?
Thanks!
Stefan
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Looks like it's still a problem with bsnmpd on 2.0. Not sure there is much we can do about that, the program comes from upstream. We have a couple patches to it, but it's mostly stock.
snmpbulkwalk -Cr101 -v 2c -c public 192.168.1.1 if…
Jan 17 19:49:02 pfsense snmpd[34209]: stack overflow detected; terminated Jan 17 19:49:03 pfsense kernel: pid 34209 (bsnmpd), uid 0: exited on signal 6 (core dumped) -
Can you please attach the core file here zipped.
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@ermal:
Can you please attach the core file here zipped.
Where do I find the core file?
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It's probably in / (the root directory)
Ermal has a core from me, and I believe he made it crash himself as well (From talking to him on IRC). He said he saw the bad code but hadn't had a chance to fix it yet.
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Okay, you or he can let me know if you guys need anything else. Thanks!
