ghsa-5mwv-x2qc-g5cj
Vulnerability from github
Published
2024-05-17 15:31
Modified
2024-11-06 18:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

In the Linux kernel, the following vulnerability has been resolved:

nvme: fix reconnection fail due to reserved tag allocation

We found a issue on production environment while using NVMe over RDMA, admin_q reconnect failed forever while remote target and network is ok. After dig into it, we found it may caused by a ABBA deadlock due to tag allocation. In my case, the tag was hold by a keep alive request waiting inside admin_q, as we quiesced admin_q while reset ctrl, so the request maked as idle and will not process before reset success. As fabric_q shares tagset with admin_q, while reconnect remote target, we need a tag for connect command, but the only one reserved tag was held by keep alive command which waiting inside admin_q. As a result, we failed to reconnect admin_q forever. In order to fix this issue, I think we should keep two reserved tags for admin queue.

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{
  "affected": [],
  "aliases": [
    "CVE-2024-27435"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-17T13:15:58Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme: fix reconnection fail due to reserved tag allocation\n\nWe found a issue on production environment while using NVMe over RDMA,\nadmin_q reconnect failed forever while remote target and network is ok.\nAfter dig into it, we found it may caused by a ABBA deadlock due to tag\nallocation. In my case, the tag was hold by a keep alive request\nwaiting inside admin_q, as we quiesced admin_q while reset ctrl, so the\nrequest maked as idle and will not process before reset success. As\nfabric_q shares tagset with admin_q, while reconnect remote target, we\nneed a tag for connect command, but the only one reserved tag was held\nby keep alive command which waiting inside admin_q. As a result, we\nfailed to reconnect admin_q forever. In order to fix this issue, I\nthink we should keep two reserved tags for admin queue.",
  "id": "GHSA-5mwv-x2qc-g5cj",
  "modified": "2024-11-06T18:31:04Z",
  "published": "2024-05-17T15:31:08Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-27435"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/149afee5c7418ec5db9d7387b9c9a5c1eb7ea2a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/262da920896e2f2ab0e3947d9dbee0aa09045818"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6851778504cdb49431809b4ba061903d5f592c96"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de105068fead55ed5c07ade75e9c8e7f86a00d1d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff2f90f88d78559802466ad1c84ac5bda4416b3a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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