Your message dated Tue, 6 Mar 2018 22:22:48 +1100
with message-id <20180306112248.ga5...@enc.com.au>
and subject line Fixed in upstream 5.4.3
has caused the Debian Bug report #510495,
regarding default install of snmpd leaks memory when VLAN interfaces present
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
510495: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=510495
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: snmpd
Version: 5.2.3-7etch4
Severity: important
The default etch install of snmpd with default config will leak memory if there
is 1 or more VLAN ethernet interfaces on the system.
This appears to be a regression between sarge and etch.
After some investigation I've found:
* leak occurs every 60 seconds
* leak occurs at a rate of 1094KB/day _per_ VLAN interface
* rate of leak is directly proportional to the number of VLAN interfaces
* leak occurs even if no snmp activity is happening (get, set, get next, trap,
etc..)
* the VLAN interface must have an IPv4 address assigned
* the VLAN interface can be either UP or DOWN
* the name of the VLAN interface doesn't matter
How to recreate:
apt-get install vlan
add to /etc/network/interfaces:
> iface eth0.100 inet static
> address 10.2.100.1
> netmask 255.255.255.0
> broadcast 10.2.100.255
ifup eth0.100
watch snmpd grow...
start of test:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
snmp 1886 0.0 0.7 6784 3860 ? S 22:06 0:00
/usr/sbin/snmpd
after 10 hours:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
snmp 1886 0.0 0.8 7300 4316 ? S Jan01 0:00
/usr/sbin/snmpd
To amplify the effect, configure 100 VLANs instead of just 1
100 vlans configured:
start of test:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
snmp 4694 0.0 0.8 7184 4188 ? S 09:16 0:00
/usr/sbin/snmpd
after 20 minutes:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
snmp 4694 0.0 1.1 8732 5720 ? S 09:16 0:00
/usr/sbin/snmpd
-- System Information:
Debian Release: 4.0
APT prefers stable
APT policy: (500, 'stable')
Architecture: i386 (i686)
Shell: /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-6-686
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Versions of packages snmpd depends on:
ii adduser 3.102 Add and remove users and groups
ii debconf 1.5.11etch2 Debian configuration management sy
ii libc6 2.3.6.ds1-13etch8 GNU C Library: Shared libraries
ii libsensors3 1:2.10.1-3 library to read temperature/voltag
ii libsnmp9 5.2.3-7etch4 NET SNMP (Simple Network Managemen
ii libwrap0 7.6.dbs-13 Wietse Venema's TCP wrappers libra
snmpd recommends no packages.
-- debconf information:
snmpd/upgradefrom521:
snmpd/upgradefrom36:
--- End Message ---
--- Begin Message ---
Package: snmpd
Version: 5.4.3-1
Upstream version 5.4.3 of net-snmp had the patch mentioned in this bug
report. Closing Debian bug as this should have fixed the leak.
- Craig
--
Craig Small https://dropbear.xyz/ csmall at : enc.com.au
Debian GNU/Linux https://www.debian.org/ csmall at : debian.org
Mastodon: @smalls...@social.dropbear.xyz Twitter: @smallsees
GPG fingerprint: 5D2F B320 B825 D939 04D2 0519 3938 F96B DF50 FEA5
--- End Message ---
