Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-35844

f2fs: compress: fix reserve_cblocks counting error when out of space

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: compress: fix reserve_cblocks counting error when out of space When a file only needs one direct_node, performing the following operations will cause the file to be unrepairable: unisoc # ./f2fs_io compress test.apk unisoc #df -h | grep dm-48 /dev/block/dm-48 112G 112G 1.2M 100% /data unisoc # ./f2fs_io release_cblocks test.apk 924 unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 4.8M 100% /data unisoc # dd if=/dev/random of=file4 bs=1M count=3 3145728 bytes (3.0 M) copied, 0.025 s, 120 M/s unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 1.8M 100% /data unisoc # ./f2fs_io reserve_cblocks test.apk F2FS_IOC_RESERVE_COMPRESS_BLOCKS failed: No space left on device adb reboot unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 11M 100% /data unisoc # ./f2fs_io reserve_cblocks test.apk 0 This is because the file has only one direct_node. After returning to -ENOSPC, reserved_blocks += ret will not be executed. As a result, the reserved_blocks at this time is still 0, which is not the real number of reserved blocks. Therefore, fsck cannot be set to repair the file. After this patch, the fsck flag will be set to fix this problem. unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 1.8M 100% /data unisoc # ./f2fs_io reserve_cblocks test.apk F2FS_IOC_RESERVE_COMPRESS_BLOCKS failed: No space left on device adb reboot then fsck will be executed unisoc # df -h | grep dm-48 /dev/block/dm-48 112G 112G 11M 100% /data unisoc # ./f2fs_io reserve_cblocks test.apk 924

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c75488fb4d82b697f381f855bf5b16779df440aa to < fa3ac8b1a227d9b470b87972494293348b5839eeaffected
  • c75488fb4d82b697f381f855bf5b16779df440aa to < 889846dfc8ee2cf31148a44bfd2faeb2faadc685affected
  • c75488fb4d82b697f381f855bf5b16779df440aa to < f0bf89e84c3afb79d7a3a9e4bc853ad6a3245c0aaffected
  • c75488fb4d82b697f381f855bf5b16779df440aa to < 569c198c9e2093fd29cc071856a4e548fda506bcaffected
  • c75488fb4d82b697f381f855bf5b16779df440aa to < fc0aed88afbf6f606205129a7466eebdf528e3f3affected
  • c75488fb4d82b697f381f855bf5b16779df440aa to < 2f6d721e14b69d6e1251f69fa238b48e8374e25faffected

Linux Linux

Default version status: affected

  • 5.8affected
  • 0 to < 5.8unaffected
  • 5.15.153 to ≤ 5.15.*unaffected
  • 6.1.83 to ≤ 6.1.*unaffected
  • 6.6.23 to ≤ 6.6.*unaffected
  • 6.7.11 to ≤ 6.7.*unaffected
  • 6.8.2 to ≤ 6.8.*unaffected
  • 6.9 to ≤ *unaffected

References