fkie_cve-2024-33847
Vulnerability from fkie_nvd
Published
2024-06-24 14:15
Modified
2024-11-21 09:17
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: don't allow unaligned truncation on released compress inode f2fs image may be corrupted after below testcase: - mkfs.f2fs -O extra_attr,compression -f /dev/vdb - mount /dev/vdb /mnt/f2fs - touch /mnt/f2fs/file - f2fs_io setflags compression /mnt/f2fs/file - dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4 - f2fs_io release_cblocks /mnt/f2fs/file - truncate -s 8192 /mnt/f2fs/file - umount /mnt/f2fs - fsck.f2fs /dev/vdb [ASSERT] (fsck_chk_inode_blk:1256) --> ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks [FSCK] valid_block_count matching with CP [Fail] [0x4, 0x5] [FSCK] other corrupted bugs [Fail] The reason is: partial truncation assume compressed inode has reserved blocks, after partial truncation, valid block count may change w/o .i_blocks and .total_valid_block_count update, result in corruption. This patch only allow cluster size aligned truncation on released compress inode for fixing.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ccf5210dc941a7aa0180596ac021568be4d35ec
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5268241b41b1c5d0acca75e9b97d4fd719251c8c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8acae047215024d1ac499b3c8337ef1b952f160b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b8962cf98595d1ec62f40f23667de830567ec8bc
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3ccf5210dc941a7aa0180596ac021568be4d35ec
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5268241b41b1c5d0acca75e9b97d4fd719251c8c
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8acae047215024d1ac499b3c8337ef1b952f160b
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b8962cf98595d1ec62f40f23667de830567ec8bc
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: compress: don\u0027t allow unaligned truncation on released compress inode\n\nf2fs image may be corrupted after below testcase:\n- mkfs.f2fs -O extra_attr,compression -f /dev/vdb\n- mount /dev/vdb /mnt/f2fs\n- touch /mnt/f2fs/file\n- f2fs_io setflags compression /mnt/f2fs/file\n- dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4\n- f2fs_io release_cblocks /mnt/f2fs/file\n- truncate -s 8192 /mnt/f2fs/file\n- umount /mnt/f2fs\n- fsck.f2fs /dev/vdb\n\n[ASSERT] (fsck_chk_inode_blk:1256)  --\u003e ino: 0x5 has i_blocks: 0x00000002, but has 0x3 blocks\n[FSCK] valid_block_count matching with CP             [Fail] [0x4, 0x5]\n[FSCK] other corrupted bugs                           [Fail]\n\nThe reason is: partial truncation assume compressed inode has reserved\nblocks, after partial truncation, valid block count may change w/o\n.i_blocks and .total_valid_block_count update, result in corruption.\n\nThis patch only allow cluster size aligned truncation on released\ncompress inode for fixing."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: comprimir: no permitir el truncamiento no alineado en el inodo comprimido liberado. La imagen f2fs puede estar da\u00f1ada despu\u00e9s del siguiente caso de prueba: - mkfs.f2fs -O extra_attr,compression -f /dev/vdb - montar /dev/vdb /mnt/f2fs - tocar /mnt/f2fs/file - f2fs_io setflags compresi\u00f3n /mnt/f2fs/file - dd if=/dev/zero of=/mnt/f2fs/file bs=4k count=4 - f2fs_io release_cblocks /mnt/f2fs/file - truncate -s 8192 /mnt/f2fs/file - umount /mnt/f2fs - fsck.f2fs /dev/vdb [ASSERT] (fsck_chk_inode_blk:1256) --\u0026gt; ino: 0x5 tiene i_blocks : 0x00000002, pero tiene bloques 0x3 [FSCK] valid_block_count que coincide con CP [Falla] [0x4, 0x5] [FSCK] otros errores corruptos [Falla] La raz\u00f3n es: truncamiento parcial se supone que el inodo comprimido tiene bloques reservados, despu\u00e9s del truncamiento parcial, bloque v\u00e1lido El recuento puede cambiar sin la actualizaci\u00f3n de .i_blocks y .total_valid_block_count, lo que provoca corrupci\u00f3n. Este parche solo permite el truncamiento alineado con el tama\u00f1o del cl\u00faster en el inodo comprimido liberado para su reparaci\u00f3n."
    }
  ],
  "id": "CVE-2024-33847",
  "lastModified": "2024-11-21T09:17:34.583",
  "metrics": {},
  "published": "2024-06-24T14:15:11.803",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3ccf5210dc941a7aa0180596ac021568be4d35ec"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5268241b41b1c5d0acca75e9b97d4fd719251c8c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8acae047215024d1ac499b3c8337ef1b952f160b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b8962cf98595d1ec62f40f23667de830567ec8bc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/3ccf5210dc941a7aa0180596ac021568be4d35ec"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/5268241b41b1c5d0acca75e9b97d4fd719251c8c"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/8acae047215024d1ac499b3c8337ef1b952f160b"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://git.kernel.org/stable/c/b8962cf98595d1ec62f40f23667de830567ec8bc"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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