f2fs: fix to do sanity check on destination blkaddr during recovery

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2022-50273
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-15 15:15:38 UTC
Updated2026-08-15 13:17:31 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: f2fs: fix to do sanity check on destination blkaddr during recovery As Wenqing Liu reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216456 loop5: detected capacity change from 0 to 131072 F2FS-fs (loop5): recover_inode: ino = 6, name = hln, inline = 1 F2FS-fs (loop5): recover_data: ino = 6 (i_size: recover) err = 0 F2FS-fs (loop5): recover_inode: ino = 6, name = hln, inline = 1 F2FS-fs (loop5): recover_data: ino = 6 (i_size: recover) err = 0 F2FS-fs (loop5): recover_inode: ino = 6, name = hln, inline = 1 F2FS-fs (loop5): recover_data: ino = 6 (i_size: recover) err = 0 F2FS-fs (loop5): Bitmap was wrongly set, blk:5634 ------------[ cut here ]------------ WARNING: CPU: 3 PID: 1013 at fs/f2fs/segment.c:2198 RIP: 0010:update_sit_entry+0xa55/0x10b0 [f2fs] Call Trace: <TASK> f2fs_do_replace_block+0xa98/0x1890 [f2fs] f2fs_replace_block+0xeb/0x180 [f2fs] recover_data+0x1a69/0x6ae0 [f2fs] f2fs_recover_fsync_data+0x120d/0x1fc0 [f2fs] f2fs_fill_super+0x4665/0x61e0 [f2fs] mount_bdev+0x2cf/0x3b0 legacy_get_tree+0xed/0x1d0 vfs_get_tree+0x81/0x2b0 path_mount+0x47e/0x19d0 do_mount+0xce/0xf0 __x64_sys_mount+0x12c/0x1a0 do_syscall_64+0x38/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd If we enable CONFIG_F2FS_CHECK_FS config, it will trigger a kernel panic instead of warning. The root cause is: in fuzzed image, SIT table is inconsistent with inode mapping table, result in triggering such warning during SIT table update. This patch introduces a new flag DATA_GENERIC_ENHANCE_UPDATE, w/ this flag, data block recovery flow can check destination blkaddr's validation in SIT table, and skip f2fs_replace_block() to avoid inconsistent status.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

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

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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 d624c96fb3249e5d3dcf4e60a805e5e6b0dd7d91 68b1e607559d3dc85f94b0d738d7c4e8029b0cfa git Not specified
CNA Linux Linux affected d624c96fb3249e5d3dcf4e60a805e5e6b0dd7d91 73fb4bd2c055a393816f078f158cdd3025006f1d git Not specified
CNA Linux Linux affected d624c96fb3249e5d3dcf4e60a805e5e6b0dd7d91 ed854f10e6afd5cbd5c3274d4c4df4bfe0ab4362 git Not specified
CNA Linux Linux affected d624c96fb3249e5d3dcf4e60a805e5e6b0dd7d91 8f0a47def4722c5fd8d6b9268b5ffed8a249e2db git Not specified
CNA Linux Linux affected d624c96fb3249e5d3dcf4e60a805e5e6b0dd7d91 3a4d24d746866dd45d970bd565ff3886e839366a git Not specified
CNA Linux Linux affected d624c96fb3249e5d3dcf4e60a805e5e6b0dd7d91 0ef4ca04a3f9223ff8bc440041c524b2123e09a3 git Not specified
CNA Linux Linux affected 3.8 Not specified
CNA Linux Linux unaffected 3.8 semver Not specified
CNA Linux Linux unaffected 5.4.220 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.150 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.75 5.15.* semver Not specified
CNA Linux Linux unaffected 5.19.17 5.19.* semver Not specified
CNA Linux Linux unaffected 6.0.3 6.0.* semver Not specified
CNA Linux Linux unaffected 6.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/73fb4bd2c055a393816f078f158cdd3025006f1d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8f0a47def4722c5fd8d6b9268b5ffed8a249e2db 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/3a4d24d746866dd45d970bd565ff3886e839366a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0ef4ca04a3f9223ff8bc440041c524b2123e09a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/68b1e607559d3dc85f94b0d738d7c4e8029b0cfa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ed854f10e6afd5cbd5c3274d4c4df4bfe0ab4362 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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