CVE-2024-42295 nilfs2: handle inconsistent state in nilfs_btnode_create_block()

2024-08-1709:09:03

Linux

www.cve.org

nilfs2

linux kernel

vulnerability fix

buffer state inconsistency

filesystem error

kernel bug

EPSS

Percentile

13.7%

JSON

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

nilfs2: handle inconsistent state in nilfs_btnode_create_block()

Syzbot reported that a buffer state inconsistency was detected in
nilfs_btnode_create_block(), triggering a kernel bug.

It is not appropriate to treat this inconsistency as a bug; it can occur
if the argument block address (the buffer index of the newly created
block) is a virtual block number and has been reallocated due to
corruption of the bitmap used to manage its allocation state.

So, modify nilfs_btnode_create_block() and its callers to treat it as a
possible filesystem error, rather than triggering a kernel bug.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "fs/nilfs2/btnode.c",
      "fs/nilfs2/btree.c"
    ],
    "versions": [
      {
        "version": "a60be987d45d",
        "lessThan": "19cce46238ff",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a60be987d45d",
        "lessThan": "02b87e6334a3",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a60be987d45d",
        "lessThan": "5f0a6800b8ae",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a60be987d45d",
        "lessThan": "e34191cce3ee",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a60be987d45d",
        "lessThan": "012be828a118",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a60be987d45d",
        "lessThan": "be56dfc9be06",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a60be987d45d",
        "lessThan": "366c3f688dd0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a60be987d45d",
        "lessThan": "4811f7af6090",
        "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/nilfs2/btnode.c",
      "fs/nilfs2/btree.c"
    ],
    "versions": [
      {
        "version": "2.6.30",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.30",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.320",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.282",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.224",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.165",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.103",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.44",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.3",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]