CVE-2022-49380

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

MEDIUM

5.5

CVSS Score

Published: February 26, 2025 at 02:11 AM UTC

Updated: August 15, 2026 at 01:36 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

Description

In 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

3.8 ≤ v < 5.10.1213.8 ≤ v < 5.15.463.8 ≤ v < 5.17.143.8 ≤ v < 5.18.33.8 ≤ v < 5.193.8 ≤ v < 5.4.1985.11 ≤ v < 5.15.465.16 ≤ v < 5.17.145.18 ≤ v < 5.18.35.5 ≤ v < 5.10.1213.839a53e0ce0df01b3cf4bb898c7ae2fd2189647d5

Vendor states this is fixed in 2766ddaf45b69252bb8fe526b5b6e56904a9ae7a (fixed)

Vendor states this is fixed in 4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e (fixed)

Vendor states this is fixed in 89d9a48d0cd30429463ea4e37ca83be6773ed5eb (fixed)

Vendor states this is fixed in bce859358d3d5940aa858e40ceee70ee6e76130e (fixed)

Vendor states this is fixed in ccffa99ae6a1f44797b57444c6a80382a42928fe (fixed)

Vendor states this is fixed in f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53 (fixed)

Vendor states this is fixed in 3.8 (unaffected)

Vendor states this is fixed in 5.10.121 (unaffected)

Vendor states this is fixed in 5.15.46 (unaffected)

Vendor states this is fixed in 5.17.14 (unaffected)

Vendor states this is fixed in 5.18.3 (unaffected)

Vendor states this is fixed in 5.19 (unaffected)