fkie_cve-2022-50382
Vulnerability from fkie_nvd
Published
2025-09-18 14:15
Modified
2025-09-19 16:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: padata: Always leave BHs disabled when running ->parallel() A deadlock can happen when an overloaded system runs ->parallel() in the context of the current task: padata_do_parallel ->parallel() pcrypt_aead_enc/dec padata_do_serial spin_lock(&reorder->lock) // BHs still enabled <interrupt> ... __do_softirq ... padata_do_serial spin_lock(&reorder->lock) It's a bug for BHs to be on in _do_serial as Steffen points out, so ensure they're off in the "current task" case like they are in padata_parallel_worker to avoid this situation.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/17afa98bccec4f52203508b3f49b5f948c6fd6ac
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/34c3a47d20ae55b3600fed733bf96eafe9c500d5
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6cfa9e60c0f88fdec6368e081ab968411cc706b1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e0681dd4eee029eb1d533d06993f7cb091efb73
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npadata: Always leave BHs disabled when running -\u003eparallel()\n\nA deadlock can happen when an overloaded system runs -\u003eparallel() in the\ncontext of the current task:\n\n    padata_do_parallel\n      -\u003eparallel()\n        pcrypt_aead_enc/dec\n          padata_do_serial\n            spin_lock(\u0026reorder-\u003elock) // BHs still enabled\n              \u003cinterrupt\u003e\n                ...\n                  __do_softirq\n                    ...\n                      padata_do_serial\n                        spin_lock(\u0026reorder-\u003elock)\n\nIt\u0027s a bug for BHs to be on in _do_serial as Steffen points out, so\nensure they\u0027re off in the \"current task\" case like they are in\npadata_parallel_worker to avoid this situation."
    }
  ],
  "id": "CVE-2022-50382",
  "lastModified": "2025-09-19T16:00:46.437",
  "metrics": {},
  "published": "2025-09-18T14:15:36.993",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/17afa98bccec4f52203508b3f49b5f948c6fd6ac"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/34c3a47d20ae55b3600fed733bf96eafe9c500d5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6cfa9e60c0f88fdec6368e081ab968411cc706b1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8e0681dd4eee029eb1d533d06993f7cb091efb73"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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