f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2024-39467
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-06-25 15:15:15 UTC
Updated2026-08-04 11:18:56 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode() syzbot reports a kernel bug as below: F2FS-fs (loop0): Mounted with checkpoint version = 48b305e4 ================================================================== BUG: KASAN: slab-out-of-bounds in f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline] BUG: KASAN: slab-out-of-bounds in current_nat_addr fs/f2fs/node.h:213 [inline] BUG: KASAN: slab-out-of-bounds in f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600 Read of size 1 at addr ffff88807a58c76c by task syz-executor280/5076 CPU: 1 PID: 5076 Comm: syz-executor280 Not tainted 6.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 f2fs_test_bit fs/f2fs/f2fs.h:2933 [inline] current_nat_addr fs/f2fs/node.h:213 [inline] f2fs_get_node_info+0xece/0x1200 fs/f2fs/node.c:600 f2fs_xattr_fiemap fs/f2fs/data.c:1848 [inline] f2fs_fiemap+0x55d/0x1ee0 fs/f2fs/data.c:1925 ioctl_fiemap fs/ioctl.c:220 [inline] do_vfs_ioctl+0x1c07/0x2e50 fs/ioctl.c:838 __do_sys_ioctl fs/ioctl.c:902 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:890 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The root cause is we missed to do sanity check on i_xattr_nid during f2fs_iget(), so that in fiemap() path, current_nat_addr() will access nat_bitmap w/ offset from invalid i_xattr_nid, result in triggering kasan bug report, fix it.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Problem Types: CWE-125

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 c559a8d840562fbfce9f318448dda2f7d3e6d8e8 git Not specified
CNA Linux Linux affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 75c87e2ac6149abf44bdde0dd6d541763ddb0dff git Not specified
CNA Linux Linux affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 1640dcf383cdba52be8b28d2a1a2aa7ef7a30c98 git Not specified
CNA Linux Linux affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 8c8aa473fe6eb46a4bf99f3ea2dbe52bf0c1a1f0 git Not specified
CNA Linux Linux affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 be0155202e431f3007778568a72432c68f8946ba git Not specified
CNA Linux Linux affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 68e3cd4ecb8603936cccdc338929130045df2e57 git Not specified
CNA Linux Linux affected 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 20faaf30e55522bba2b56d9c46689233205d7717 git Not specified
CNA Linux Linux affected 3.8 Not specified
CNA Linux Linux unaffected 3.8 semver Not specified
CNA Linux Linux unaffected 5.4.278 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.219 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.161 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.94 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.34 6.6.* semver Not specified
CNA Linux Linux unaffected 6.9.5 6.9.* semver Not specified
CNA Linux Linux unaffected 6.10 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/20faaf30e55522bba2b56d9c46689233205d7717 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/68e3cd4ecb8603936cccdc338929130045df2e57 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/75c87e2ac6149abf44bdde0dd6d541763ddb0dff af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/8c8aa473fe6eb46a4bf99f3ea2dbe52bf0c1a1f0 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/be0155202e431f3007778568a72432c68f8946ba af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/c559a8d840562fbfce9f318448dda2f7d3e6d8e8 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/1640dcf383cdba52be8b28d2a1a2aa7ef7a30c98 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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