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Created attachment 1238664 [details]
abrt logs including coredump

Description of problem:
snmpd eatch too much CPU and RAM while processing ipv6IfDescr part of the tree if interface index is too large. It eats more resources as index is larger. This leads to timeout snmpwalk request, the timeout needs to be extend to get the data.

I also get core-dumps at some point, see attachment.

Version-Release number of selected component (if applicable):
net-snmp-5.7.2-24.el7_2.1

How reproducible:
100%

Steps to Reproduce:
1. set manage ifindex to be big enough, e.g. 268435448
2. start snmpd
3. issue snmpbulkwalk -t 15 localhost ipv6IfDescr

Actual results:
snmpbulkwalk times out and snmpd eats up system resources and coredumps

Expected results:
snmpd behaves nicly to system resources and snmpbulkwalk gets all the data

Additional info:

*** Bug 1437508 has been marked as a duplicate of this bug. ***

Red Hat Enterprise Linux version 7 is entering the Maintaining phase 1 of its lifetime and this bug doesn't meet the criteria for it, i.e. only high severity issues will be fixed. Please see https://access.redhat.com/support/policy/updates/errata/ for further information.

Closing as WONTFIX.