kubelet: fix potential resource leak and double file close.

[xyz-li]

What type of PR is this?

/kind flake

What this PR does / why we need it:

A sample code mimic the function ReadLogs
It may cause resource leaks and close the file twice.

func closeFileTwice() {
	fn := "/tmp/abc.txt"
	f, _ := os.Open(fn)
	defer f.Close()

	for i := 0; i < 10; i++ {
		newF, _ := os.Open(fn)
		defer func(f *os.File) {
			if err := f.Close(); err != nil {
				panic(err)
			}
		}(newF)

		f.Close()
		f = newF
	}
}

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

Please note that we're already in Test Freeze for the release-1.30 branch. This means every merged PR will be automatically fast-forwarded via the periodic ci-fast-forward job to the release branch of the upcoming v1.30.0 release.

Fast forwards are scheduled to happen every 6 hours, whereas the most recent run was: Fri Apr 12 19:49:25 UTC 2024.

[k8s-ci-robot]

Hi @xyz-li. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[bart0sh]

/triage accepted
/priority important-longterm
/cc

[bart0sh]

/ok-to-test

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: a8dcc8c8c940f9b65c206210714127e648c6a841

[bart0sh]

/assign @mrunalp @derekwaynecarr @dchen1107
for approval

[k8s-ci-robot]

New changes are detected. LGTM label has been removed.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: xyz-li
Once this PR has been reviewed and has the lgtm label, please ask for approval from dchen1107. For more information see the Kubernetes Code Review Process.

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• staging/src/k8s.io/cri-client/OWNERS

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