{"id":"CVE-2024-39467","summary":"f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()\n\nsyzbot reports a kernel bug as below:\n\nF2FS-fs (loop0): Mounted with checkpoint version = 48b305e4\n==================================================================\nBUG: KASAN: slab-out-of-bounds in f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\nBUG: KASAN: slab-out-of-bounds in current_nat_addr fs/f2fs/node.h:213 [inline]\nBUG: KASAN: slab-out-of-bounds in f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\nRead of size 1 at addr ffff88807a58c76c by task syz-executor280/5076\n\nCPU: 1 PID: 5076 Comm: syz-executor280 Not tainted 6.9.0-rc5-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline]\n current_nat_addr fs/f2fs/node.h:213 [inline]\n f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600\n f2fs_xattr_fiemap fs/f2fs/data.c:1848 [inline]\n f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925\n ioctl_fiemap fs/ioctl.c:220 [inline]\n do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:838\n __do_sys_ioctl fs/ioctl.c:902 [inline]\n __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is we missed to do sanity check on i_xattr_nid during\nf2fs_iget(), so that in fiemap() path, current_nat_addr() will access\nnat_bitmap w/ offset from invalid i_xattr_nid, result in triggering\nkasan bug report, fix it.","modified":"2026-04-16T04:42:21.103673766Z","published":"2024-06-25T14:25:05.609Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39467.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1640dcf383cdba52be8b28d2a1a2aa7ef7a30c98"},{"type":"WEB","url":"https://git.kernel.org/stable/c/20faaf30e55522bba2b56d9c46689233205d7717"},{"type":"WEB","url":"https://git.kernel.org/stable/c/68e3cd4ecb8603936cccdc338929130045df2e57"},{"type":"WEB","url":"https://git.kernel.org/stable/c/75c87e2ac6149abf44bdde0dd6d541763ddb0dff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8c8aa473fe6eb46a4bf99f3ea2dbe52bf0c1a1f0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/be0155202e431f3007778568a72432c68f8946ba"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c559a8d840562fbfce9f318448dda2f7d3e6d8e8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/39xxx/CVE-2024-39467.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-39467"},{"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":"c559a8d840562fbfce9f318448dda2f7d3e6d8e8"},{"fixed":"75c87e2ac6149abf44bdde0dd6d541763ddb0dff"},{"fixed":"1640dcf383cdba52be8b28d2a1a2aa7ef7a30c98"},{"fixed":"8c8aa473fe6eb46a4bf99f3ea2dbe52bf0c1a1f0"},{"fixed":"be0155202e431f3007778568a72432c68f8946ba"},{"fixed":"68e3cd4ecb8603936cccdc338929130045df2e57"},{"fixed":"20faaf30e55522bba2b56d9c46689233205d7717"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-39467.json"}}],"schema_version":"1.7.5"}