[release-branch.go1.20] net: tolerate permission errors in interface tests

On our linux-arm64 builders, we're getting permission errors despite
running as root. Detect those errors and skip the test.

For #61414.
Fixes #61449

Change-Id: I5d7c45789337bee3860b19335bbb9eb884c48986
Reviewed-on: https://go-review.googlesource.com/c/go/+/510737
Auto-Submit: Heschi Kreinick <heschi@google.com>
Run-TryBot: Heschi Kreinick <heschi@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit 8e1ec1cb9385414a7d6b664d8ace6bc9468cc500)
Reviewed-on: https://go-review.googlesource.com/c/go/+/511137
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
1 file changed
tree: 81421e9b78e156bcf6dbdd84747b4fd59a046662
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. codereview.cfg
  11. CONTRIBUTING.md
  12. LICENSE
  13. PATENTS
  14. README.md
  15. SECURITY.md
  16. VERSION
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