I just ran into a segfault in netsnmp_swinst_arch_load() where if the
pkg_directory name is set, but the dir can't be opened, it was still attempting
to read the NULL descriptor.
Symptom: snmpd segfault when walking the entire MIB (one of the Host Resources
tables)
Patch below. Apologies if this is already known/fixed.
Cheers,
-Joe
--- /home/jlorenz/netsnmp-5.7/agent/mibgroup/host/data_access/swinst_pkginfo.c
2011-07-01 18:35:46.000000000 -0400
+++ agent/mibgroup/host/data_access/swinst_pkginfo.c 2011-09-30
11:55:09.000000000 -0400
@@ -102,6 +102,10 @@
if there isn't a list of them! */
}
d = opendir( pkg_directory );
+ if ( !d ) {
+ snmp_log( LOG_ERR, "SWInst: could not open package directory %s\n",
pkg_directory );
+ return 1;
+ }
while (NULL != (dp = readdir( d ))) {
if ( '.' == dp->d_name[0] )
continue;
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