{"id":"CVE-2024-50229","summary":"nilfs2: fix potential deadlock with newly created symlinks","details":"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-\u003ens_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-\u003ens_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.","modified":"2026-05-18T05:57:57.475718036Z","published":"2024-11-09T10:14:39.756Z","related":["SUSE-SU-2024:4314-1","SUSE-SU-2024:4315-1","SUSE-SU-2024:4316-1","SUSE-SU-2024:4318-1","SUSE-SU-2024:4364-1","SUSE-SU-2024:4376-1","SUSE-SU-2024:4387-1","SUSE-SU-2025:20163-1","SUSE-SU-2025:20164-1","SUSE-SU-2025:20246-1","SUSE-SU-2025:20247-1","USN-7276-1","USN-7277-1","openSUSE-SU-2024:14500-1","openSUSE-SU-2025:14705-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50229.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1246d86e7bbde265761932c6e2dce28c69cdcb91"},{"type":"WEB","url":"https://git.kernel.org/stable/c/58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38"},{"type":"WEB","url":"https://git.kernel.org/stable/c/69548bb663fcb63f9ee0301be808a36b9d78dac3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9aa5d43ac4cace8fb9bd964ff6c23f599dc3cd24"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1686db1e59f8fc016c4c9361e2119dd206f479a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b3a033e3ecd3471248d474ef263aadc0059e516a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c72e0df0b56c1166736dc8eb62070ebb12591447"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cc38c596e648575ce58bfc31623a6506eda4b94a"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/50xxx/CVE-2024-50229.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-50229"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"21fc61c73c3903c4c312d0802da01ec2b323d174"},{"fixed":"cc38c596e648575ce58bfc31623a6506eda4b94a"},{"fixed":"a1686db1e59f8fc016c4c9361e2119dd206f479a"},{"fixed":"c72e0df0b56c1166736dc8eb62070ebb12591447"},{"fixed":"69548bb663fcb63f9ee0301be808a36b9d78dac3"},{"fixed":"58c7f44c7b9e5ac7e3b1e5da2572ed7767a12f38"},{"fixed":"1246d86e7bbde265761932c6e2dce28c69cdcb91"},{"fixed":"9aa5d43ac4cace8fb9bd964ff6c23f599dc3cd24"},{"fixed":"b3a033e3ecd3471248d474ef263aadc0059e516a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"076e4ab3279eb3ddb206de44d04df7aeb2428e09"}]}],"versions":["v4.4.115","v4.4.114","v4.4.113","v4.4.112","v4.4.111","v4.4.110","v4.4.109","v4.4.108","v4.4.107","v4.4.106","v4.4.105","v4.4.104","v4.4.103","v4.4.102","v4.4.101","v4.4.100","v4.4.99","v4.4.98","v4.4.97","v4.4.96","v4.4.95","v4.4.94","v4.4.93","v4.4.92","v4.4.91","v4.4.90","v4.4.89","v4.4.88","v4.4.87","v4.4.86","v4.4.85","v4.4.84","v4.4.83","v4.4.82","v4.4.81","v4.4.80","v4.4.79","v4.4.78","v4.4.77","v4.4.76","v4.4.75","v4.4.74","v4.4.73","v4.4.72","v4.4.71","v4.4.70","v4.4.69","v4.4.68","v4.4.67","v4.4.66","v4.4.65","v4.4.64","v4.4.63","v4.4.62","v4.4.61","v4.4.60","v4.4.59","v4.4.58","v4.4.57","v4.4.56","v4.4.55","v4.4.54","v4.4.53","v4.4.52","v4.4.51","v4.4.50","v4.4.49","v4.4.48","v4.4.47","v4.4.46","v4.4.45","v4.4.44","v4.4.43","v4.4.42","v4.4.41","v4.4.40","v4.4.39","v4.4.38","v4.4.37","v4.4.36","v4.4.35","v4.4.34","v4.4.33","v4.4.32","v4.4.31","v4.4.30","v4.4.29","v4.4.28","v4.4.27","v4.4.26","v4.4.25","v4.4.24","v4.4.23","v4.4.22","v4.4.21","v4.4.20","v4.4.19","v4.4.18","v4.4.17","v4.4.16","v4.4.15","v4.4.14","v4.4.13","v4.4.12","v4.4.11","v4.4.10","v4.4.9","v4.4.8","v4.4.7","v4.4.6","v4.4","v4.4.5","v4.4.4","v4.4.3","v4.4.2","v4.4.1","v4.4-rc1","v4.4-rc2","v4.4-rc8","v4.4-rc3","v4.4-rc7","v4.4-rc5","v4.4-rc6","v4.4-rc4","v4.3","v4.3-rc1","v4.3-rc6","v4.3-rc4","v4.3-rc2","v4.3-rc7","v4.3-rc5","v4.3-rc3","v4.2","v4.2-rc2","v4.2-rc1","v4.2-rc8","v4.2-rc4","v4.2-rc6","v4.2-rc7","v4.0-rc5","v4.2-rc5","v4.2-rc3","v4.1-rc2","v4.1","v4.1-rc1","v4.1-rc8","v4.1-rc7","v4.1-rc6","v4.1-rc3","v4.1-rc4","v4.0","v4.1-rc5","v4.0-rc1","v4.0-rc2","v4.0-rc7","v4.0-rc3","v4.0-rc6","v4.0-rc4","v3.19","v3.19-rc7","v3.19-rc5","v3.19-rc1","v3.19-rc6","v3.19-rc4","v3.18-rc1","v3.19-rc3","v3.19-rc2","v3.18","v3.18-rc7","v3.18-rc6","v3.18-rc2","v3.18-rc3","v3.18-rc4","v3.18-rc5","v3.17","v3.17-rc1","v3.17-rc7","v3.17-rc2","v3.17-rc4","v3.16","v3.17-rc5","v3.17-rc6","v3.17-rc3","v3.16-rc7","v3.16-rc1","v3.16-rc3","v3.16-rc5","v3.16-rc6","v3.16-rc2","v3.16-rc4","v3.13","v3.15","v3.15-rc5","v3.15-rc8","v3.15-rc1","v3.15-rc6","v3.15-rc3","v3.15-rc7","v3.15-rc2","v3.15-rc4","v3.14","v3.14-rc4","v3.14-rc8","v3.14-rc7","v3.14-rc6","v3.14-rc1","v3.14-rc2","v3.14-rc5","v3.14-rc3","v3.13-rc6","v3.13-rc8","v3.12","v3.13-rc7","v3.13-rc1","v3.13-rc4","v3.13-rc3","v3.13-rc5","v3.13-rc2","v3.12-rc7","v3.12-rc3","v3.12-rc6","v3.12-rc1","v3.12-rc5","v3.11","v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