net: prevent defer misuse in for loops

[1911860538]

Previously defer statements were used inside for loops which will lead delayed resource cleanup.

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Patch Set 1:

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Patch Set 2:

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Patch Set 3: Commit-Queue+1

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Patch Set 3:

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Patch Set 3: -Commit-Queue

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Patch Set 3:

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Patch Set 3: LUCI-TryBot-Result+1

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Patch Set 3:

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Patch Set 3:

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Message from 黄志文:

Patch Set 4:

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Message from Florian Lehner:

Patch Set 4: Code-Review+1

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Patch Set 4: Commit-Queue+1

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Patch Set 4:

Dry run: CV is trying the patch.

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Patch Set 4:

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Patch Set 4: -Commit-Queue

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Patch Set 4:

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Patch Set 4: LUCI-TryBot-Result+1

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