CVE-2024-26869 f2fs: fix to truncate meta inode pages forcely

2024-04-1710:27:30

Linux

www.cve.org

linux kernel

vulnerability resolved

data corruption

race case

meta inode page

f2fs fix

truncate.

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.7%

JSON

In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix to truncate meta inode pages forcely

Below race case can cause data corruption:

Thread A GC thread
- gc_data_segment
- ra_data_block
- locked meta_inode page

f2fs_inplace_write_data
invalidate_mapping_pages
: fail to invalidate meta_inode page
due to lock failure or dirty|writeback
status
f2fs_submit_page_bio
: write last dirty data to old blkaddr
- move_data_block
- load old data from meta_inode page
- f2fs_submit_page_write
: write old data to new blkaddr

Because invalidate_mapping_pages() will skip invalidating page which
has unclear status including locked, dirty, writeback and so on, so
we need to use truncate_inode_pages_range() instead of
invalidate_mapping_pages() to make sure meta_inode page will be dropped.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/f2fs/checkpoint.c",
      "fs/f2fs/f2fs.h",
      "fs/f2fs/segment.c",
      "include/linux/f2fs_fs.h"
    ],
    "versions": [
      {
        "version": "6aa58d8ad20a",
        "lessThan": "c92f2927df86",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6aa58d8ad20a",
        "lessThan": "77bfdb89cc22",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6aa58d8ad20a",
        "lessThan": "04226d8e3c40",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6aa58d8ad20a",
        "lessThan": "9f0c4a46be1f",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/f2fs/checkpoint.c",
      "fs/f2fs/f2fs.h",
      "fs/f2fs/segment.c",
      "include/linux/f2fs_fs.h"
    ],
    "versions": [
      {
        "version": "4.19",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.19",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.23",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.11",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.2",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]