f2fs: fix to avoid f2fs_bug_on() in dec_valid_node_count()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2022-49380
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-02-26 07:01:14 UTC
Updated2026-08-15 13:17:21 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid f2fs_bug_on() in dec_valid_node_count() As Yanming reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215897 I have encountered a bug in F2FS file system in kernel v5.17. The kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can reproduce the bug by running the following commands: The kernel message is shown below: kernel BUG at fs/f2fs/f2fs.h:2511! Call Trace: f2fs_remove_inode_page+0x2a2/0x830 f2fs_evict_inode+0x9b7/0x1510 evict+0x282/0x4e0 do_unlinkat+0x33a/0x540 __x64_sys_unlinkat+0x8e/0xd0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae The root cause is: .total_valid_block_count or .total_valid_node_count could fuzzed to zero, then once dec_valid_node_count() was called, it will cause BUG_ON(), this patch fixes to print warning info and set SBI_NEED_FSCK into CP instead of panic.

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 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53 git Not specified
CNA Linux Linux affected 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 2766ddaf45b69252bb8fe526b5b6e56904a9ae7a git Not specified
CNA Linux Linux affected 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 bce859358d3d5940aa858e40ceee70ee6e76130e git Not specified
CNA Linux Linux affected 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 89d9a48d0cd30429463ea4e37ca83be6773ed5eb git Not specified
CNA Linux Linux affected 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 ccffa99ae6a1f44797b57444c6a80382a42928fe git Not specified
CNA Linux Linux affected 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e git Not specified
CNA Linux Linux affected 3.8 Not specified
CNA Linux Linux unaffected 3.8 semver Not specified
CNA Linux Linux unaffected 5.4.198 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.121 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.46 5.15.* semver Not specified
CNA Linux Linux unaffected 5.17.14 5.17.* semver Not specified
CNA Linux Linux unaffected 5.18.3 5.18.* semver Not specified
CNA Linux Linux unaffected 5.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/89d9a48d0cd30429463ea4e37ca83be6773ed5eb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2766ddaf45b69252bb8fe526b5b6e56904a9ae7a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ccffa99ae6a1f44797b57444c6a80382a42928fe 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bce859358d3d5940aa858e40ceee70ee6e76130e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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