{"id":"CVE-2024-44942","summary":"f2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on F2FS_INLINE_DATA flag in inode during GC\n\nsyzbot reports a f2fs bug as below:\n\n------------[ cut here ]------------\nkernel BUG at fs/f2fs/inline.c:258!\nCPU: 1 PID: 34 Comm: kworker/u8:2 Not tainted 6.9.0-rc6-syzkaller-00012-g9e4bc4bcae01 #0\nRIP: 0010:f2fs_write_inline_data+0x781/0x790 fs/f2fs/inline.c:258\nCall Trace:\n f2fs_write_single_data_page+0xb65/0x1d60 fs/f2fs/data.c:2834\n f2fs_write_cache_pages fs/f2fs/data.c:3133 [inline]\n __f2fs_write_data_pages fs/f2fs/data.c:3288 [inline]\n f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3315\n do_writepages+0x35b/0x870 mm/page-writeback.c:2612\n __writeback_single_inode+0x165/0x10b0 fs/fs-writeback.c:1650\n writeback_sb_inodes+0x905/0x1260 fs/fs-writeback.c:1941\n wb_writeback+0x457/0xce0 fs/fs-writeback.c:2117\n wb_do_writeback fs/fs-writeback.c:2264 [inline]\n wb_workfn+0x410/0x1090 fs/fs-writeback.c:2304\n process_one_work kernel/workqueue.c:3254 [inline]\n process_scheduled_works+0xa12/0x17c0 kernel/workqueue.c:3335\n worker_thread+0x86d/0xd70 kernel/workqueue.c:3416\n kthread+0x2f2/0x390 kernel/kthread.c:388\n ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147\n ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244\n\nThe root cause is: inline_data inode can be fuzzed, so that there may\nbe valid blkaddr in its direct node, once f2fs triggers background GC\nto migrate the block, it will hit f2fs_bug_on() during dirty page\nwriteback.\n\nLet's add sanity check on F2FS_INLINE_DATA flag in inode during GC,\nso that, it can forbid migrating inline_data inode's data block for\nfixing.","modified":"2026-05-28T03:52:44.173361708Z","published":"2024-08-26T11:20:46.478Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/44xxx/CVE-2024-44942.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/26c07775fb5dc74351d1c3a2bc3cdf609b03e49f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ae00e6536a2dd54b64b39e9a39548870cf835745"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fc01008c92f40015aeeced94750855a7111b6929"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/44xxx/CVE-2024-44942.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-44942"},{"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":"98e4da8ca301e062d79ae168c67e56f3c3de3ce4"},{"fixed":"ae00e6536a2dd54b64b39e9a39548870cf835745"},{"fixed":"26c07775fb5dc74351d1c3a2bc3cdf609b03e49f"},{"fixed":"fc01008c92f40015aeeced94750855a7111b6929"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-44942.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.0"},{"fixed":"6.6.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.10.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-44942.json"}}],"schema_version":"1.7.5"}