OCPBUGS-100376: cherry-pick 24c6dce279c418bcb911824e8c8be1c81a1e832b - Fix fibrechannel_linux for ppc64le (#3769)

[prb112]

Seen on a master node:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x106cefa4]
goroutine 81 [running]:
github.com/prometheus/node_exporter/collector.(*fibrechannelCollector).Update(0x7e28c1ae20f0, 0x7e28c1826770)
  /go/src/github.com/prometheus/node_exporter/collector/fibrechannel_linux.go:133 +0x604

sh-5.1# ls -l /host/sys/class/fc_host/
total 0
lrwxrwxrwx. 1 root root 0 Jul 30 20:42 host1 -> ../../devices/vio/30000003/host1/fc_host/host1
lrwxrwxrwx. 1 root root 0 Jul 30 20:42 host2 -> ../../devices/vio/30000005/host2/fc_host/host2
sh-5.1# ls -l /host/sys/class/fc_host/host1/
total 0
-rw-r--r--. 1 root root 65536 Jul 30 20:09 dev_loss_tmo
lrwxrwxrwx. 1 root root     0 Jul 30 20:42 device -> ../../../host1
-r--r--r--. 1 root root 65536 Jul 30 20:09 fabric_name
--w-------. 1 root root 65536 Jul 30 20:42 issue_lip
-r--r--r--. 1 root root 65536 Jul 30 20:42 maxframe_size
-r--r--r--. 1 root root 65536 Jul 30 20:09 node_name
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_id
-r--r--r--. 1 root root 65536 Jul 30 20:42 port_name
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_state
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_type
drwxr-xr-x. 2 root root     0 Jul 30 20:42 power
-r--r--r--. 1 root root 65536 Jul 30 20:09 speed
lrwxrwxrwx. 1 root root     0 Jul 30 20:42 subsystem -> ../../../../../../class/fc_host
-r--r--r--. 1 root root 65536 Jul 30 20:09 supported_classes
-rw-r--r--. 1 root root 65536 Jul 30 20:42 tgtid_bind_type
-rw-r--r--. 1 root root 65536 Jul 30 20:42 uevent

Since many filenames for counters are not guaranteed to exist in VMs, allocate if not present.

[openshift-merge-bot]

Pipeline controller notification
This repo is configured to use the pipeline controller. Second-stage tests will be triggered either automatically or after lgtm label is added, depending on the repository configuration. The pipeline controller will automatically detect which contexts are required and will utilize /test Prow commands to trigger the second stage.

For optional jobs, comment /test ? to see a list of all defined jobs. To trigger manually all jobs from second stage use /pipeline required command.

This repository is configured in: LGTM mode

[openshift-ci-robot]

@prb112: This pull request references Jira Issue OCPBUGS-100376, which is invalid:

• expected the bug to target either version "5.1.0." or "openshift-5.1.0.", but it targets "5.0.0" instead

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

Details

In response to this:

Seen on a master node:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x106cefa4]
goroutine 81 [running]:
github.com/prometheus/node_exporter/collector.(*fibrechannelCollector).Update(0x7e28c1ae20f0, 0x7e28c1826770)
 /go/src/github.com/prometheus/node_exporter/collector/fibrechannel_linux.go:133 +0x604

sh-5.1# ls -l /host/sys/class/fc_host/
total 0
lrwxrwxrwx. 1 root root 0 Jul 30 20:42 host1 -> ../../devices/vio/30000003/host1/fc_host/host1
lrwxrwxrwx. 1 root root 0 Jul 30 20:42 host2 -> ../../devices/vio/30000005/host2/fc_host/host2
sh-5.1# ls -l /host/sys/class/fc_host/host1/
total 0
-rw-r--r--. 1 root root 65536 Jul 30 20:09 dev_loss_tmo
lrwxrwxrwx. 1 root root     0 Jul 30 20:42 device -> ../../../host1
-r--r--r--. 1 root root 65536 Jul 30 20:09 fabric_name
--w-------. 1 root root 65536 Jul 30 20:42 issue_lip
-r--r--r--. 1 root root 65536 Jul 30 20:42 maxframe_size
-r--r--r--. 1 root root 65536 Jul 30 20:09 node_name
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_id
-r--r--r--. 1 root root 65536 Jul 30 20:42 port_name
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_state
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_type
drwxr-xr-x. 2 root root     0 Jul 30 20:42 power
-r--r--r--. 1 root root 65536 Jul 30 20:09 speed
lrwxrwxrwx. 1 root root     0 Jul 30 20:42 subsystem -> ../../../../../../class/fc_host
-r--r--r--. 1 root root 65536 Jul 30 20:09 supported_classes
-rw-r--r--. 1 root root 65536 Jul 30 20:42 tgtid_bind_type
-rw-r--r--. 1 root root 65536 Jul 30 20:42 uevent

Since many filenames for counters are not guaranteed to exist in VMs, allocate if not present.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[prb112]

/jira refresh

[openshift-ci-robot]

@prb112: This pull request references Jira Issue OCPBUGS-100376, which is valid. The bug has been moved to the POST state.

3 validation(s) were run on this bug

• bug is open, matching expected state (open)
• bug target version (5.1.0) matches configured target version for branch (5.1.0)
• bug is in the state ASSIGNED, which is one of the valid states (NEW, ASSIGNED, POST)

Details

In response to this:

/jira refresh

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[prb112]

/cc @jan--f

Per our discussion

[prb112]

/assign @hamzy

FYI

[jan--f]

/lgtm
/approve
/verified by unit-tests

[openshift-ci-robot]

@jan--f: This PR has been marked as verified by unit-tests.

Details

In response to this:

/lgtm
/approve
/verified by unit-tests

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-merge-bot]

Scheduling required tests:
/test e2e-agnostic-cmo
/test e2e-aws
/test e2e-aws-upgrade

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jan--f, prb112

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Details

Needs approval from an approver in each of these files:

• OWNERS [jan--f]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[prb112]

/test e2e-agnostic-cmo

[openshift-ci]

@prb112: all tests passed!

Full PR test history. Your PR dashboard.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.

[openshift-ci-robot]

@prb112: Jira Issue Verification Checks: Jira Issue OCPBUGS-100376
✔️ This pull request was pre-merge verified.
✔️ All associated pull requests have merged.
✔️ All associated, merged pull requests were pre-merge verified.

Jira Issue OCPBUGS-100376 has been moved to the MODIFIED state and will move to the VERIFIED state when the change is available in an accepted nightly payload. 🕓

Details

In response to this:

Seen on a master node:

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x106cefa4]
goroutine 81 [running]:
github.com/prometheus/node_exporter/collector.(*fibrechannelCollector).Update(0x7e28c1ae20f0, 0x7e28c1826770)
 /go/src/github.com/prometheus/node_exporter/collector/fibrechannel_linux.go:133 +0x604

sh-5.1# ls -l /host/sys/class/fc_host/
total 0
lrwxrwxrwx. 1 root root 0 Jul 30 20:42 host1 -> ../../devices/vio/30000003/host1/fc_host/host1
lrwxrwxrwx. 1 root root 0 Jul 30 20:42 host2 -> ../../devices/vio/30000005/host2/fc_host/host2
sh-5.1# ls -l /host/sys/class/fc_host/host1/
total 0
-rw-r--r--. 1 root root 65536 Jul 30 20:09 dev_loss_tmo
lrwxrwxrwx. 1 root root     0 Jul 30 20:42 device -> ../../../host1
-r--r--r--. 1 root root 65536 Jul 30 20:09 fabric_name
--w-------. 1 root root 65536 Jul 30 20:42 issue_lip
-r--r--r--. 1 root root 65536 Jul 30 20:42 maxframe_size
-r--r--r--. 1 root root 65536 Jul 30 20:09 node_name
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_id
-r--r--r--. 1 root root 65536 Jul 30 20:42 port_name
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_state
-r--r--r--. 1 root root 65536 Jul 30 20:09 port_type
drwxr-xr-x. 2 root root     0 Jul 30 20:42 power
-r--r--r--. 1 root root 65536 Jul 30 20:09 speed
lrwxrwxrwx. 1 root root     0 Jul 30 20:42 subsystem -> ../../../../../../class/fc_host
-r--r--r--. 1 root root 65536 Jul 30 20:09 supported_classes
-rw-r--r--. 1 root root 65536 Jul 30 20:42 tgtid_bind_type
-rw-r--r--. 1 root root 65536 Jul 30 20:42 uevent

Since many filenames for counters are not guaranteed to exist in VMs, allocate if not present.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[openshift-merge-robot]

Fix included in release 5.1.0-0.nightly-2026-08-21-103028

[prb112]

/cherry-pick release-5.0

[openshift-cherrypick-robot]

@prb112: new pull request created: #185

Details

In response to this:

/cherry-pick release-5.0

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.