{"id":"CVE-2024-50229","state":"PUBLISHED","title":"nilfs2: fix potential deadlock with newly created symlinks","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential deadlock with newly created symlinks\n\nSyzbot reported that page_symlink(), called by nilfs_symlink(), triggers\nmemory reclamation involving the filesystem layer, which can result in\ncircular lock dependencies among the reader/writer semaphore\nnilfs->ns_segctor_sem, s_writers percpu_rwsem (intwrite) and the\nfs_reclaim pseudo lock.\n\nThis is because after commit 21fc61c73c39 (\"don't put symlink bodies in\npagecache into highmem\"), the gfp flags of the page cache for symbolic\nlinks are overwritten to GFP_KERNEL via inode_nohighmem().\n\nThis is not a problem for symlinks read from the backing device, because\nthe __GFP_FS flag is dropped after inode_nohighmem() is called.  However,\nwhen a new symlink is created with nilfs_symlink(), the gfp flags remain\noverwritten to GFP_KERNEL.  Then, memory allocation called from\npage_symlink() etc.  triggers memory reclamation including the FS layer,\nwhich may call nilfs_evict_inode() or nilfs_dirty_inode().  And these can\ncause a deadlock if they are called while nilfs->ns_segctor_sem is held:\n\nFix this issue by dropping the __GFP_FS flag from the page cache GFP flags\nof newly created symlinks in the same way that nilfs_new_inode() and\n__nilfs_read_inode() do, as a workaround until we adopt nofs allocation\nscope consistently or improve the locking constraints.","publishedAt":"2024-11-09T10:14:39.756Z","updatedAt":"2026-05-23T15:54:47.926Z","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":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"cc38c596e648575ce58bfc31623a6506eda4b94a","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"a1686db1e59f8fc016c4c9361e2119dd206f479a","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"c72e0df0b56c1166736dc8eb62070ebb12591447","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"69548bb663fcb63f9ee0301be808a36b9d78dac3","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"1246d86e7bbde265761932c6e2dce28c69cdcb91","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"9aa5d43ac4cace8fb9bd964ff6c23f599dc3cd24","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"b3a033e3ecd3471248d474ef263aadc0059e516a","versionType":"git"},{"version":"076e4ab3279eb3ddb206de44d04df7aeb2428e09","status":"affected","versionType":"git"},{"version":"4.4.116","status":"affected","lessThan":"4.5","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/namei.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.5","versionType":"semver"},{"version":"4.19.323","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.229","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.171","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.116","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.60","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.7","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/namei.c"]}],"references":["https://git.kernel.org/stable/c/cc38c596e648575ce58bfc31623a6506eda4b94a","https://git.kernel.org/stable/c/a1686db1e59f8fc016c4c9361e2119dd206f479a","https://git.kernel.org/stable/c/c72e0df0b56c1166736dc8eb62070ebb12591447","https://git.kernel.org/stable/c/69548bb663fcb63f9ee0301be808a36b9d78dac3","https://git.kernel.org/stable/c/58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38","https://git.kernel.org/stable/c/1246d86e7bbde265761932c6e2dce28c69cdcb91","https://git.kernel.org/stable/c/9aa5d43ac4cace8fb9bd964ff6c23f599dc3cd24","https://git.kernel.org/stable/c/b3a033e3ecd3471248d474ef263aadc0059e516a","https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"],"weaknesses":["CWE-667"],"ingestedAt":"2026-10-29T20:07:56.516Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/50xxx/CVE-2024-50229.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-50229","state":"PUBLISHED","datePublished":"2024-11-09T10:14:39.756Z","dateUpdated":"2026-05-23T15:54:47.926Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-10-21T19:36:19.973Z"},"containers":{"cna":{"title":"nilfs2: fix potential deadlock with newly created symlinks","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential deadlock with newly created symlinks\n\nSyzbot reported that page_symlink(), called by nilfs_symlink(), triggers\nmemory reclamation involving the filesystem layer, which can result in\ncircular lock dependencies among the reader/writer semaphore\nnilfs->ns_segctor_sem, s_writers percpu_rwsem (intwrite) and the\nfs_reclaim pseudo lock.\n\nThis is because after commit 21fc61c73c39 (\"don't put symlink bodies in\npagecache into highmem\"), the gfp flags of the page cache for symbolic\nlinks are overwritten to GFP_KERNEL via inode_nohighmem().\n\nThis is not a problem for symlinks read from the backing device, because\nthe __GFP_FS flag is dropped after inode_nohighmem() is called.  However,\nwhen a new symlink is created with nilfs_symlink(), the gfp flags remain\noverwritten to GFP_KERNEL.  Then, memory allocation called from\npage_symlink() etc.  triggers memory reclamation including the FS layer,\nwhich may call nilfs_evict_inode() or nilfs_dirty_inode().  And these can\ncause a deadlock if they are called while nilfs->ns_segctor_sem is held:\n\nFix this issue by dropping the __GFP_FS flag from the page cache GFP flags\nof newly created symlinks in the same way that nilfs_new_inode() and\n__nilfs_read_inode() do, as a workaround until we adopt nofs allocation\nscope consistently or improve the locking constraints."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"cc38c596e648575ce58bfc31623a6506eda4b94a","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"a1686db1e59f8fc016c4c9361e2119dd206f479a","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"c72e0df0b56c1166736dc8eb62070ebb12591447","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"69548bb663fcb63f9ee0301be808a36b9d78dac3","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"1246d86e7bbde265761932c6e2dce28c69cdcb91","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"9aa5d43ac4cace8fb9bd964ff6c23f599dc3cd24","versionType":"git"},{"version":"21fc61c73c3903c4c312d0802da01ec2b323d174","status":"affected","lessThan":"b3a033e3ecd3471248d474ef263aadc0059e516a","versionType":"git"},{"version":"076e4ab3279eb3ddb206de44d04df7aeb2428e09","status":"affected","versionType":"git"},{"version":"4.4.116","status":"affected","lessThan":"4.5","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/namei.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.5","versionType":"semver"},{"version":"4.19.323","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.285","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.229","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.171","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.116","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.60","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.11.7","status":"unaffected","lessThanOrEqual":"6.11.*","versionType":"semver"},{"version":"6.12","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/nilfs2/namei.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/cc38c596e648575ce58bfc31623a6506eda4b94a"},{"url":"https://git.kernel.org/stable/c/a1686db1e59f8fc016c4c9361e2119dd206f479a"},{"url":"https://git.kernel.org/stable/c/c72e0df0b56c1166736dc8eb62070ebb12591447"},{"url":"https://git.kernel.org/stable/c/69548bb663fcb63f9ee0301be808a36b9d78dac3"},{"url":"https://git.kernel.org/stable/c/58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38"},{"url":"https://git.kernel.org/stable/c/1246d86e7bbde265761932c6e2dce28c69cdcb91"},{"url":"https://git.kernel.org/stable/c/9aa5d43ac4cace8fb9bd964ff6c23f599dc3cd24"},{"url":"https://git.kernel.org/stable/c/b3a033e3ecd3471248d474ef263aadc0059e516a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:54:47.926Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"4.19.323"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"5.4.285"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"5.10.229"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"5.15.171"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.1.116"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.6.60"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.11.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.116"}]}]}],"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-2024-50229","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T20:16:47.687851Z"}}}],"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":"2025-10-01T20:17:27.890Z"}},{"title":"CVE Program 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