| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: handle overlapped pclusters out of crafted images properly\n\nsyzbot reported a task hang issue due to a deadlock case where it is\nwaiting for the folio lock of a cached folio that will be used for\ncache I/Os.\n\nAfter looking into the crafted fuzzed image, I found it's formed with\nseveral overlapped big pclusters as below:\n\n Ext: logical offset | length : physical offset | length\n 0: 0.. 16384 | 16384 : 151552.. 167936 | 16384\n 1: 16384.. 32768 | 16384 : 155648.. 172032 | 16384\n 2: 32768.. 49152 | 16384 : 537223168.. 537239552 | 16384\n...\n\nHere, extent 0/1 are physically overlapped although it's entirely\n_impossible_ for normal filesystem images generated by mkfs.\n\nFirst, managed folios containing compressed data will be marked as\nup-to-date and then unlocked immediately (unlike in-place folios) when\ncompressed I/Os are complete. If physical blocks are not submitted in\nthe incremental order, there should be separate BIOs to avoid dependency\nissues. However, the current code mis-arranges z_erofs_fill_bio_vec()\nand BIO submission which causes unexpected BIO waits.\n\nSecond, managed folios will be connected to their own pclusters for\nefficient inter-queries. However, this is somewhat hard to implement\neasily if overlapped big pclusters exist. Again, these only appear in\nfuzzed images so let's simply fall back to temporary short-lived pages\nfor correctness.\n\nAdditionally, it justifies that referenced managed folios cannot be\ntruncated for now and reverts part of commit 2080ca1ed3e4 (\"erofs: tidy\nup `struct z_erofs_bvec`\") for simplicity although it shouldn't be any\ndifference." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/erofs/zdata.c" |
| ], |
| "versions": [ |
| { |
| "version": "8e6c8fa9f2e95c88a642521a5da19a8e31748846", |
| "lessThan": "1bf7e414cac303c9aec1be67872e19be8b64980c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8e6c8fa9f2e95c88a642521a5da19a8e31748846", |
| "lessThan": "b9b30af0e86ffb485301ecd83b9129c9dfb7ebf8", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8e6c8fa9f2e95c88a642521a5da19a8e31748846", |
| "lessThan": "9cfa199bcbbbba31cbf97b2786f44f4464f3f29a", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "8e6c8fa9f2e95c88a642521a5da19a8e31748846", |
| "lessThan": "9e2f9d34dd12e6e5b244ec488bcebd0c2d566c50", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "fs/erofs/zdata.c" |
| ], |
| "versions": [ |
| { |
| "version": "5.13", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "5.13", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.72", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.10.13", |
| "lessThanOrEqual": "6.10.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.11.2", |
| "lessThanOrEqual": "6.11.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12", |
| "lessThanOrEqual": "*", |
| "status": "unaffected", |
| "versionType": "original_commit_for_fix" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.13", |
| "versionEndExcluding": "6.6.72" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.13", |
| "versionEndExcluding": "6.10.13" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.13", |
| "versionEndExcluding": "6.11.2" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "5.13", |
| "versionEndExcluding": "6.12" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/1bf7e414cac303c9aec1be67872e19be8b64980c" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/b9b30af0e86ffb485301ecd83b9129c9dfb7ebf8" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/9cfa199bcbbbba31cbf97b2786f44f4464f3f29a" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/9e2f9d34dd12e6e5b244ec488bcebd0c2d566c50" |
| } |
| ], |
| "title": "erofs: handle overlapped pclusters out of crafted images properly", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-47736", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
