Segmentation fault on armv5 for collector "netdev"

[cah-jad-baz]

Host operating system: output of uname -a

Linux SDcard 2.6.34 #17 PREEMPT Fri Nov 11 15:06:02 MST 2011 armv5tel GNU/Linux

node_exporter version: output of node_exporter --version

This was custom built because of issues/2476

node_exporter, version 1.4.0-rc.0 (branch: HEAD, revision: 73dabdfe9eb9a46a5349a486ebf4bb75e9660f29)
  build user:       root@1a363a2743bc
  build date:       20230214-20:22:25
  go version:       go1.19.5
  platform:         linux/arm

node_exporter command line flags

./node_exporter_arm --collector.disable-defaults --collector.netdev

node_exporter log output

~# ./node_exporter_arm --collector.disable-defaults --collector.netdev
ts=2023-02-23T18:57:17.114Z caller=node_exporter.go:180 level=info msg="Starting node_exporter" version="(version=1.5.0, branch=HEAD, revision=1b48970ffcf5630534fb00bb0687d73c66d1c959)"
ts=2023-02-23T18:57:17.117Z caller=node_exporter.go:181 level=info msg="Build context" build_context="(go=go1.19.5, user=root@1a363a2743bc, date=20230214-20:22:25)"
ts=2023-02-23T18:57:17.121Z caller=node_exporter.go:183 level=warn msg="Node Exporter is running as root user. This exporter is designed to run as unprivileged user, root is not required."
ts=2023-02-23T18:57:17.143Z caller=node_exporter.go:110 level=info msg="Enabled collectors"
ts=2023-02-23T18:57:17.143Z caller=node_exporter.go:117 level=info collector=netdev
ts=2023-02-23T18:57:17.220Z caller=tls_config.go:232 level=info msg="Listening on" address=0.0.0.0:9100
ts=2023-02-23T18:57:17.240Z caller=tls_config.go:235 level=info msg="TLS is disabled." http2=false address=0.0.0.0:9100
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x64b0c0]goroutine 33 [running]:
github.com/prometheus/node_exporter/collector.parseNetlinkStats({0x1176ba0, 0x2, 0x2}, 0x105d658, {0x8ad2ec, 0x105d620})
        /build_dir/node_exporter/collector/netdev_linux.go:69 +0x1e0
github.com/prometheus/node_exporter/collector.netlinkStats(0x105d658, {0x8ad2ec, 0x105d620})
        /build_dir/node_exporter/collector/netdev_linux.go:52 +0x114
github.com/prometheus/node_exporter/collector.getNetDevStats(0x105d658, {0x8ad2ec, 0x105d620})
        /build_dir/node_exporter/collector/netdev_linux.go:35 +0x40
github.com/prometheus/node_exporter/collector.(*netDevCollector).Update(0x105d650, 0x1173280)
        /build_dir/node_exporter/collector/netdev_common.go:113 +0x34
github.com/prometheus/node_exporter/collector.execute({0x79ab29, 0x6}, {0x8ad74c, 0x105d650}, 0x1173280, {0x8ad350, 0x11284c0})
        /build_dir/node_exporter/collector/collector.go:161 +0x40
github.com/prometheus/node_exporter/collector.NodeCollector.Collect.func1({0x79ab29, 0x6}, {0x8ad74c, 0x105d650})
        /build_dir/node_exporter/collector/collector.go:152 +0x54
created by github.com/prometheus/node_exporter/collector.NodeCollector.Collect
        /build_dir/node_exporter/collector/collector.go:151 +0x7c 

Are you running node_exporter in Docker?

No

What did you do that produced an error?

Run node-exporter with the "netdev" collector. If we exclude the "netdev" collector, we don't have any issues

What did you expect to see?

I expected node-exporter to run normally

What did you see instead?

Segmentation fault

[SuperQ]

Duplicate of #2476

[cah-jad-baz]

How is it a duplicate of #2476?
#2476 is happening because of an old version of golang. This issue happened with node-exporter compiled with 1.19.5. So an upgrade of golang will fix #2476 but will not fix this issue

[cah-jad-baz]

@SuperQ, this is not a duplicate, please review the description again

[discordianfish]

Yeah that seems different

[dswarbrick]

See prometheus/procfs#499