{"id":"CVE-2022-49296","state":"PUBLISHED","title":"ceph: fix possible deadlock when holding Fwb to get inline_data","description":"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()-->\n     ceph_mdsc_do_request(openc)\n     finish_open(file, dentry, ceph_open)-->\n       ceph_open()-->\n         ceph_init_file()-->\n           ceph_init_file_info()-->\n             ceph_uninline_data()-->\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->i_inline_version will keep with 1,\nit's buggy.\n\n3, buffer write to the file immediately:\n\n   ceph_write_iter()-->\n     ceph_get_caps(file, need=Fw, want=Fb, ...);\n     generic_perform_write()-->\n       a_ops->write_begin()-->\n         ceph_write_begin()-->\n           netfs_write_begin()-->\n             netfs_begin_read()-->\n               netfs_rreq_submit_slice()-->\n                 netfs_read_from_server()-->\n                   rreq->netfs_ops->issue_read()-->\n                     ceph_netfs_issue_read()-->\n                     {\n                       ...\n                       if (ci->i_inline_version != CEPH_INLINE_NONE &&\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 --> 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's deadlock!\n\nURL: https://tracker.ceph.com/issues/55377","publishedAt":"2025-02-26T02:01:26.131Z","updatedAt":"2026-08-12T23:58:22.125Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"083db6fd3e73fc4f9ee74d2da1012a94216d6a60","status":"affected","lessThan":"292b7a7275ce535a1abfa4dd0b2e586162aaae1e","versionType":"git"},{"version":"083db6fd3e73fc4f9ee74d2da1012a94216d6a60","status":"affected","lessThan":"825978fd6a0defc3c29d8a38b6cea76a0938d21e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ceph/addr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"5.18.4","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ceph/addr.c"]}],"references":["https://git.kernel.org/stable/c/292b7a7275ce535a1abfa4dd0b2e586162aaae1e","https://git.kernel.org/stable/c/825978fd6a0defc3c29d8a38b6cea76a0938d21e"],"weaknesses":["CWE-667"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49296.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49296","state":"PUBLISHED","datePublished":"2025-02-26T02:01:26.131Z","dateUpdated":"2026-08-12T23:58:22.125Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T01:49:39.302Z"},"containers":{"cna":{"title":"ceph: fix possible deadlock when holding Fwb to get inline_data","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()-->\n     ceph_mdsc_do_request(openc)\n     finish_open(file, dentry, ceph_open)-->\n       ceph_open()-->\n         ceph_init_file()-->\n           ceph_init_file_info()-->\n             ceph_uninline_data()-->\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->i_inline_version will keep with 1,\nit's buggy.\n\n3, buffer write to the file immediately:\n\n   ceph_write_iter()-->\n     ceph_get_caps(file, need=Fw, want=Fb, ...);\n     generic_perform_write()-->\n       a_ops->write_begin()-->\n         ceph_write_begin()-->\n           netfs_write_begin()-->\n             netfs_begin_read()-->\n               netfs_rreq_submit_slice()-->\n                 netfs_read_from_server()-->\n                   rreq->netfs_ops->issue_read()-->\n                     ceph_netfs_issue_read()-->\n                     {\n                       ...\n                       if (ci->i_inline_version != CEPH_INLINE_NONE &&\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 --> 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's deadlock!\n\nURL: https://tracker.ceph.com/issues/55377"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"083db6fd3e73fc4f9ee74d2da1012a94216d6a60","status":"affected","lessThan":"292b7a7275ce535a1abfa4dd0b2e586162aaae1e","versionType":"git"},{"version":"083db6fd3e73fc4f9ee74d2da1012a94216d6a60","status":"affected","lessThan":"825978fd6a0defc3c29d8a38b6cea76a0938d21e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ceph/addr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"5.18.4","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ceph/addr.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/292b7a7275ce535a1abfa4dd0b2e586162aaae1e"},{"url":"https://git.kernel.org/stable/c/825978fd6a0defc3c29d8a38b6cea76a0938d21e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-12T23:58:22.125Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"5.18.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49296","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:44:59.503744Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-667","lang":"en","type":"CWE","description":"CWE-667 Improper Locking"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:46:59.734Z"}}]}}}