Row creation in snmpTargetAddrTable fails in 64-bit version

Bug #587828 reported by Ulrik Forsgren on 2010-05-31
This bug affects 1 person
Affects Status Importance Assigned to Milestone
net-snmp (Ubuntu)

Bug Description

When trying to create a row in the snmpTargetAddrTable in a 64-bit system the attempt fails with this error:

ddskufo@ddskufo-laptop:~/Skrivbord/SNMP RFC'er/snmpV2$ snmptable localhost snmpTargetAddrTable
SNMP-TARGET-MIB::snmpTargetAddrTable: No entries
ddskufo@ddskufo-laptop:~/Skrivbord/SNMP RFC'er/snmpV2$ snmpset localhost snmpTargetAddrRowStatus."'ulrik'" i 5
Error in packet.
Reason: wrongLength (The set value has an illegal length from what the agent expects)
Failed object: SNMP-TARGET-MIB::snmpTargetAddrRowStatus.'ulrik'

The error is located to this piece of code on row 1504 in net-snmp/agent/mibgroup/target/snmpTargetAddrEntry.c:

        if (var_val_len != sizeof(int)) {
                        "write to snmpTargetAddrRowStatus: bad length\n"));
            char s[128];
            sprintf(&s, "int length %d != %d\n", sizeof(int), var_val_len);
            DEBUGMSGTL(("snmpTargetAddrEntry", s));
            return SNMP_ERR_WRONGLENGTH;

var_val_len is reported as 4
sizeof(int) in a 64-bit system

And 4 != 8, which means SNMP_ERR_WRONGLENGTH will be returned.

In the case sizeof(int) should be replaced with 4 and the if statement should look like:
if (var_val_len != 4) {

It would be suitable for both 32-bit and 64-bit systems.

Package information:

Package: snmpd
Priority: optional
Section: net
Installed-Size: 1228
Maintainer: Ubuntu Core Developers <email address hidden>
Original-Maintainer: Net-SNMP Packaging Team <email address hidden>
Architecture: amd64
Source: net-snmp
Replaces: snmptraplogd
Depends: libc6 (>= 2.4), libsnmp15 (>=, libwrap0 (>= 7.6-4~), debconf (>= 0.5) | debconf-2.0, adduser, debconf, lsb-base (>= 3.2-13)
Conflicts: snmp (<< 3.6-3), snmptraplogd
Filename: pool/main/n/net-snmp/snmpd_5.4.2.1~dfsg0ubuntu1-0ubuntu2_amd64.deb
Size: 953054
MD5sum: 003d4e890109109fe632e31545ca6a9c
SHA1: 67805e1406c9ce59922c573e8dab15128a21172a
SHA256: 1b923d0809e7b1c85a67226afcb38f53972eb8d3ec5310755179f5ef6688ef54
Description: SNMP (Simple Network Management Protocol) agents
 The Simple Network Management Protocol (SNMP) provides a framework
 for the exchange of management information between agents (servers)
 and clients.
 The Net-SNMP agent is a daemon which listens for incoming SNMP
 requests from clients and provides responses.
Origin: Ubuntu
Supported: 5y

Ulrik Forsgren (ulrik-forsgren) wrote :

A corretion to data sizes above, the should be the otherway around.

var_val_len is reported as 8
sizeof(int) is 4 in a 64-bit system

And 8 != 4, which means SNMP_ERR_WRONGLENGTH will be returned.

In the case sizeof(int) should be replaced with 4 and the if statement should look like:
if (var_val_len != 8) {

or possibly

if (var_val_len != sizeof(long)) {

This has been reported earlier for net-snmp:

Chuck Short (zulcss) on 2010-05-31
Changed in net-snmp (Ubuntu):
status: New → Confirmed
importance: Undecided → Medium
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package net-snmp - 5.4.3~dfsg-1ubuntu3

net-snmp (5.4.3~dfsg-1ubuntu3) maverick; urgency=low

  * debian/patches/ubuntu-fix-lp-587828.patch: Fix row creation for 64bit arches.
    (LP: #587828)
 -- Chuck Short <email address hidden> Wed, 25 Aug 2010 10:18:45 -0400

Changed in net-snmp (Ubuntu):
status: Confirmed → Fix Released
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