> On Dec 28, 2016, at 16:20, Ngie Cooper <n...@freebsd.org> wrote: > > Author: ngie > Date: Thu Dec 29 00:20:03 2016 > New Revision: 310729 > URL: https://svnweb.freebsd.org/changeset/base/310729 > > Log: > Prevent improper memory accesses after calling snmp_pdu_free and > snmp_value_free > > snmp_pdu_free: set pdu->nbindings to 0 to limit the damage that > could happen if a pdu was reused after calling the function, and > as both stack and heap allocation types are used in contrib/bsnmp > and usr.sbin/bsnmpd. > > snmp_value_free: NULL out value->v.octetstring.octets after calling > free on it to prevent a double-free from occurring.
This commit identified a bug in the bsnmptools implementation: % bsnmpwalk -s 172.16.45.130:161 sysDescr.0 = fbsd12 3045910434 FreeBSD 12.0-CURRENT Bus error (core dumped)
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