CVE-2022-49296 (GCVE-0-2022-49296)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:01 – Updated: 2026-08-12 23:58
VLAI
Title
ceph: fix possible deadlock when holding Fwb to get inline_data
Summary
In the Linux kernel, the following vulnerability has been resolved: ceph: fix possible deadlock when holding Fwb to get inline_data 1, mount with wsync. 2, create a file with O_RDWR, and the request was sent to mds.0: ceph_atomic_open()--> ceph_mdsc_do_request(openc) finish_open(file, dentry, ceph_open)--> ceph_open()--> ceph_init_file()--> ceph_init_file_info()--> ceph_uninline_data()--> { ... if (inline_version == 1 || /* initial version, no data */ inline_version == CEPH_INLINE_NONE) goto out_unlock; ... } The inline_version will be 1, which is the initial version for the new create file. And here the ci->i_inline_version will keep with 1, it's buggy. 3, buffer write to the file immediately: ceph_write_iter()--> ceph_get_caps(file, need=Fw, want=Fb, ...); generic_perform_write()--> a_ops->write_begin()--> ceph_write_begin()--> netfs_write_begin()--> netfs_begin_read()--> netfs_rreq_submit_slice()--> netfs_read_from_server()--> rreq->netfs_ops->issue_read()--> ceph_netfs_issue_read()--> { ... if (ci->i_inline_version != CEPH_INLINE_NONE && ceph_netfs_issue_op_inline(subreq)) return; ... } ceph_put_cap_refs(ci, Fwb); The ceph_netfs_issue_op_inline() will send a getattr(Fsr) request to mds.1. 4, then the mds.1 will request the rd lock for CInode::filelock from the auth mds.0, the mds.0 will do the CInode::filelock state transation from excl --> sync, but it need to revoke the Fxwb caps back from the clients. While the kernel client has aleady held the Fwb caps and waiting for the getattr(Fsr). It's deadlock! URL: https://tracker.ceph.com/issues/55377
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:44 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 083db6fd3e73fc4f9ee74d2da1012a94216d6a60 , < 292b7a7275ce535a1abfa4dd0b2e586162aaae1e (git)
Affected: 083db6fd3e73fc4f9ee74d2da1012a94216d6a60 , < 825978fd6a0defc3c29d8a38b6cea76a0938d21e (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 5.18.4 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix possible deadlock when holding Fwb to get inline_data\n\n1, mount with wsync.\n2, create a file with O_RDWR, and the request was sent to mds.0:\n\n   ceph_atomic_open()--\u003e\n     ceph_mdsc_do_request(openc)\n     finish_open(file, dentry, ceph_open)--\u003e\n       ceph_open()--\u003e\n         ceph_init_file()--\u003e\n           ceph_init_file_info()--\u003e\n             ceph_uninline_data()--\u003e\n             {\n               ...\n               if (inline_version == 1 || /* initial version, no data */\n                   inline_version == CEPH_INLINE_NONE)\n                     goto out_unlock;\n               ...\n             }\n\nThe inline_version will be 1, which is the initial version for the\nnew create file. And here the ci-\u003ei_inline_version will keep with 1,\nit\u0027s buggy.\n\n3, buffer write to the file immediately:\n\n   ceph_write_iter()--\u003e\n     ceph_get_caps(file, need=Fw, want=Fb, ...);\n     generic_perform_write()--\u003e\n       a_ops-\u003ewrite_begin()--\u003e\n         ceph_write_begin()--\u003e\n           netfs_write_begin()--\u003e\n             netfs_begin_read()--\u003e\n               netfs_rreq_submit_slice()--\u003e\n                 netfs_read_from_server()--\u003e\n                   rreq-\u003enetfs_ops-\u003eissue_read()--\u003e\n                     ceph_netfs_issue_read()--\u003e\n                     {\n                       ...\n                       if (ci-\u003ei_inline_version != CEPH_INLINE_NONE \u0026\u0026\n                           ceph_netfs_issue_op_inline(subreq))\n                         return;\n                       ...\n                     }\n     ceph_put_cap_refs(ci, Fwb);\n\nThe ceph_netfs_issue_op_inline() will send a getattr(Fsr) request to\nmds.1.\n\n4, then the mds.1 will request the rd lock for CInode::filelock from\nthe auth mds.0, the mds.0 will do the CInode::filelock state transation\nfrom excl --\u003e sync, but it need to revoke the Fxwb caps back from the\nclients.\n\nWhile the kernel client has aleady held the Fwb caps and waiting for\nthe getattr(Fsr).\n\nIt\u0027s deadlock!\n\nURL: https://tracker.ceph.com/issues/55377"
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            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ceph: se corrige un posible bloqueo al mantener presionado Fwb para obtener inline_data 1, montar con wsync. 2, crear un archivo con O_RDWR y la solicitud se envi\u00f3 a mds.0: ceph_atomic_open()--\u0026gt; ceph_mdsc_do_request(openc) finish_open(file, dentry, ceph_open)--\u0026gt; ceph_open()--\u0026gt; ceph_init_file()--\u0026gt; ceph_init_file_info()--\u0026gt; ceph_uninline_data()--\u0026gt; { ... if (inline_version == 1 || /* versi\u00f3n inicial, sin datos */ inline_version == CEPH_INLINE_NONE) goto out_unlock; ... } La inline_version ser\u00e1 1, que es la versi\u00f3n inicial para el nuevo archivo de creaci\u00f3n. Y aqu\u00ed, ci-\u0026gt;i_inline_version se mantendr\u00e1 con 1, es un error. 3, escribe en el b\u00fafer inmediatamente en el archivo: ceph_write_iter()--\u0026gt; ceph_get_caps(archivo, necesidad=Fw, deseo=Fb, ...); generic_perform_write()--\u0026gt; a_ops-\u0026gt;write_begin()--\u0026gt; ceph_write_begin()--\u0026gt; netfs_write_begin()--\u0026gt; netfs_begin_read()--\u0026gt; netfs_rreq_submit_slice()--\u0026gt; netfs_read_from_server()--\u0026gt; rreq-\u0026gt;netfs_ops-\u0026gt;issue_read()--\u0026gt; ceph_netfs_issue_read()--\u0026gt; { ... if (ci-\u0026gt;i_inline_version != CEPH_INLINE_NONE \u0026amp;\u0026amp; ceph_netfs_issue_op_inline(subreq)) return; ... } ceph_put_cap_refs(ci, Fwb); El ceph_netfs_issue_op_inline() enviar\u00e1 una solicitud getattr(Fsr) a mds.1.4, luego mds.1 solicitar\u00e1 el bloqueo de rd para CInode::filelock desde el mds.0 de autenticaci\u00f3n, el mds.0 realizar\u00e1 la transacci\u00f3n de estado de CInode::filelock desde excl --\u0026gt; sync, pero necesita revocar las capacidades Fxwb de los clientes. Mientras que el cliente del kernel ya ha retenido las capacidades Fwb y est\u00e1 esperando el getattr(Fsr). \u00a1Est\u00e1 en un punto muerto! URL: https://tracker.ceph.com/issues/55377"
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                  "content": {
                    "id": "CVE-2022-49296",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-10-01T19:44:59.503744Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-667",
                    "description": "CWE-667 Improper Locking",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-10-01T16:13:13.291Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "fs/ceph/addr.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "292b7a7275ce535a1abfa4dd0b2e586162aaae1e",
                  "status": "affected",
                  "version": "083db6fd3e73fc4f9ee74d2da1012a94216d6a60",
                  "versionType": "git"
                },
                {
                  "lessThan": "825978fd6a0defc3c29d8a38b6cea76a0938d21e",
                  "status": "affected",
                  "version": "083db6fd3e73fc4f9ee74d2da1012a94216d6a60",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "fs/ceph/addr.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.18"
                },
                {
                  "lessThan": "5.18",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.18.*",
                  "status": "unaffected",
                  "version": "5.18.4",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.19",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18.4",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.19",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix possible deadlock when holding Fwb to get inline_data\n\n1, mount with wsync.\n2, create a file with O_RDWR, and the request was sent to mds.0:\n\n   ceph_atomic_open()--\u003e\n     ceph_mdsc_do_request(openc)\n     finish_open(file, dentry, ceph_open)--\u003e\n       ceph_open()--\u003e\n         ceph_init_file()--\u003e\n           ceph_init_file_info()--\u003e\n             ceph_uninline_data()--\u003e\n             {\n               ...\n               if (inline_version == 1 || /* initial version, no data */\n                   inline_version == CEPH_INLINE_NONE)\n                     goto out_unlock;\n               ...\n             }\n\nThe inline_version will be 1, which is the initial version for the\nnew create file. And here the ci-\u003ei_inline_version will keep with 1,\nit\u0027s buggy.\n\n3, buffer write to the file immediately:\n\n   ceph_write_iter()--\u003e\n     ceph_get_caps(file, need=Fw, want=Fb, ...);\n     generic_perform_write()--\u003e\n       a_ops-\u003ewrite_begin()--\u003e\n         ceph_write_begin()--\u003e\n           netfs_write_begin()--\u003e\n             netfs_begin_read()--\u003e\n               netfs_rreq_submit_slice()--\u003e\n                 netfs_read_from_server()--\u003e\n                   rreq-\u003enetfs_ops-\u003eissue_read()--\u003e\n                     ceph_netfs_issue_read()--\u003e\n                     {\n                       ...\n                       if (ci-\u003ei_inline_version != CEPH_INLINE_NONE \u0026\u0026\n                           ceph_netfs_issue_op_inline(subreq))\n                         return;\n                       ...\n                     }\n     ceph_put_cap_refs(ci, Fwb);\n\nThe ceph_netfs_issue_op_inline() will send a getattr(Fsr) request to\nmds.1.\n\n4, then the mds.1 will request the rd lock for CInode::filelock from\nthe auth mds.0, the mds.0 will do the CInode::filelock state transation\nfrom excl --\u003e sync, but it need to revoke the Fxwb caps back from the\nclients.\n\nWhile the kernel client has aleady held the Fwb caps and waiting for\nthe getattr(Fsr).\n\nIt\u0027s deadlock!\n\nURL: https://tracker.ceph.com/issues/55377"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-12T23:58:22.125Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/292b7a7275ce535a1abfa4dd0b2e586162aaae1e"
            },
            {
              "url": "https://git.kernel.org/stable/c/825978fd6a0defc3c29d8a38b6cea76a0938d21e"
            }
          ],
          "title": "ceph: fix possible deadlock when holding Fwb to get inline_data",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49296",
        "datePublished": "2025-02-26T02:01:26.131Z",
        "dateReserved": "2025-02-26T01:49:39.302Z",
        "dateUpdated": "2026-08-12T23:58:22.125Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Nomenclature

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