{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c 1.2.1"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cloudflare/tableflip"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.2.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-21T14:40:36Z",
    "nvd_published_at": null,
    "severity": "LOW"
  },
  "details": "### Impact\nProcesses using tableflip may encounter hung goroutines in the parent process, after a failed upgrade.\n\nThe Go runtime has annoying behaviour around setting and clearing\nO_NONBLOCK: exec.Cmd.Start() ends up calling os.File.Fd() for any\nfile in exec.Cmd.ExtraFiles. os.File.Fd() disables both the use\nof the runtime poller for the file and clears O_NONBLOCK from\nthe underlying open file descriptor.\n\nThis can lead to goroutines hanging in a parent process, after at least\none failed upgrade. The bug manifests in goroutines which rely on\neither a deadline or interruption via Close() to be unblocked being stuck\nin read or accept like syscalls. As far as I can tell we\u0027ve not experienced\nthis problem in production, so it\u0027s most likely quite rare.\n\n### Patches\nThe problem has been fixed in v1.2.2.\n\n### Workarounds\nNone.\n\n### References\n* https://github.com/cloudflare/tableflip/commit/cae714b289e199db5da5f08af861ea65be6232c0",
  "id": "GHSA-gmq2-39ff-f5qg",
  "modified": "2021-05-21T14:40:36Z",
  "published": "2021-05-21T16:25:48Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/tableflip/security/advisories/GHSA-gmq2-39ff-f5qg"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cloudflare/tableflip/commit/cae714b289e199db5da5f08af861ea65be6232c0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "A failed upgrade may lead to hung goroutines"
}