CVE-2021-47514 devlink: fix netns refcount leak in devlink_nl_cmd_reload()

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/core/devlink.c"
    ],
    "versions": [
      {
        "version": "ccdf07219da6bd1f43c6ddcde4c0e36993c7365a",
        "lessThan": "4b7e90672af8e0c78205db006f1b0a20ebd07f5f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ccdf07219da6bd1f43c6ddcde4c0e36993c7365a",
        "lessThan": "fe30b70ca84da9c4aca85c03ad86e7a9b89c5ded",
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      {
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      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "net/core/devlink.c"
    ],
    "versions": [
      {
        "version": "5.10",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.10",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.10.85",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.15.8",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "semver"
      },
      {
        "version": "5.16",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]