CVE-2022-50170 kunit: executor: Fix a memory leak on failure in kunit_filter_tests

[
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    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "lib/kunit/executor.c"
    ],
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      {
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    ]
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  {
    "product": "Linux",
    "vendor": "Linux",
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    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "lib/kunit/executor.c"
    ],
    "versions": [
      {
        "version": "5.19",
        "status": "affected"
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      {
        "version": "0",
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      {
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      {
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      {
        "version": "6.0",
        "lessThanOrEqual": "*",
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        "versionType": "original_commit_for_fix"
      }
    ]
  }
]