| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: decrease sc_count directly if fail to queue dl_recall\n\nA deadlock warning occurred when invoking nfs4_put_stid following a failed\ndl_recall queue operation:\n T1 T2\n nfs4_laundromat\n nfs4_get_client_reaplist\n nfs4_anylock_blockers\n__break_lease\n spin_lock // ctx->flc_lock\n spin_lock // clp->cl_lock\n nfs4_lockowner_has_blockers\n locks_owner_has_blockers\n spin_lock // flctx->flc_lock\n nfsd_break_deleg_cb\n nfsd_break_one_deleg\n nfs4_put_stid\n refcount_dec_and_lock\n spin_lock // clp->cl_lock\n\nWhen a file is opened, an nfs4_delegation is allocated with sc_count\ninitialized to 1, and the file_lease holds a reference to the delegation.\nThe file_lease is then associated with the file through kernel_setlease.\n\nThe disassociation is performed in nfsd4_delegreturn via the following\ncall chain:\nnfsd4_delegreturn --> destroy_delegation --> destroy_unhashed_deleg -->\nnfs4_unlock_deleg_lease --> kernel_setlease --> generic_delete_lease\nThe corresponding sc_count reference will be released after this\ndisassociation.\n\nSince nfsd_break_one_deleg executes while holding the flc_lock, the\ndisassociation process becomes blocked when attempting to acquire flc_lock\nin generic_delete_lease. This means:\n1) sc_count in nfsd_break_one_deleg will not be decremented to 0;\n2) The nfs4_put_stid called by nfsd_break_one_deleg will not attempt to\nacquire cl_lock;\n3) Consequently, no deadlock condition is created.\n\nGiven that sc_count in nfsd_break_one_deleg remains non-zero, we can\nsafely perform refcount_dec on sc_count directly. This approach\neffectively avoids triggering deadlock warnings." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/nfsd/nfs4state.c" |
| ], |
| "versions": [ |
| { |
| "version": "b874cdef4e67e5150e07eff0eae1cbb21fb92da1", |
| "lessThan": "b9bbe8f9d5663311d06667ce36d6ed255ead1a26", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "cdb796137c57e68ca34518d53be53b679351eb86", |
| "lessThan": "a70832d3555987035fc430ccd703acd89393eadb", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "d96587cc93ec369031bcd7658c6adc719873c9fd", |
| "lessThan": "ba903539fff745d592d893c71b30e5e268a95413", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "9a81cde8c7ce65dd90fb47ceea93a45fc1a2fbd1", |
| "lessThan": "7d192e27a431026c58d60edf66dc6cd98d0c01fc", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "cad3479b63661a399c9df1d0b759e1806e2df3c8", |
| "lessThan": "a7fce086f6ca84db409b9d58493ea77c1978897c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "133f5e2a37ce08c82d24e8fba65e0a81deae4609", |
| "lessThan": "14985d66b9b99c12995dd99d1c6c8dec4114c2a5", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "230ca758453c63bd38e4d9f4a21db698f7abada8", |
| "lessThan": "a1d14d931bf700c1025db8c46d6731aa5cf440f9", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "63b91c8ff4589f5263873b24c052447a28e10ef7", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/nfsd/nfs4state.c" |
| ], |
| "versions": [ |
| { |
| "version": "5.10.236", |
| "lessThan": "5.10.237", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.180", |
| "lessThan": "5.15.181", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.134", |
| "lessThan": "6.1.135", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.87", |
| "lessThan": "6.6.88", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.23", |
| "lessThan": "6.12.25", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14.2", |
| "lessThan": "6.14.4", |
| "status": "affected", |
| "versionType": "semver" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.10.236", |
| "versionEndExcluding": "5.10.237" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.15.180", |
| "versionEndExcluding": "5.15.181" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1.134", |
| "versionEndExcluding": "6.1.135" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.6.87", |
| "versionEndExcluding": "6.6.88" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.12.23", |
| "versionEndExcluding": "6.12.25" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.14.2", |
| "versionEndExcluding": "6.14.4" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.13.11" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/b9bbe8f9d5663311d06667ce36d6ed255ead1a26" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/a70832d3555987035fc430ccd703acd89393eadb" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/ba903539fff745d592d893c71b30e5e268a95413" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/7d192e27a431026c58d60edf66dc6cd98d0c01fc" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/a7fce086f6ca84db409b9d58493ea77c1978897c" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/14985d66b9b99c12995dd99d1c6c8dec4114c2a5" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/a1d14d931bf700c1025db8c46d6731aa5cf440f9" |
| } |
| ], |
| "title": "nfsd: decrease sc_count directly if fail to queue dl_recall", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-37871", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
