cve-2024-35844
Vulnerability from cvelistv5
Published
2024-05-17 14:40
Modified
2024-11-05 09:23
Severity ?
Summary
f2fs: compress: fix reserve_cblocks counting error when out of space
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f6d721e14b69d6e1251f69fa238b48e8374e25f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/569c198c9e2093fd29cc071856a4e548fda506bc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/889846dfc8ee2cf31148a44bfd2faeb2faadc685
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f0bf89e84c3afb79d7a3a9e4bc853ad6a3245c0a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fa3ac8b1a227d9b470b87972494293348b5839ee
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc0aed88afbf6f606205129a7466eebdf528e3f3
Impacted products
Vendor Product Version
Linux Linux Version: 5.8
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: compress: fix reserve_cblocks counting error when out of space\n\nWhen a file only needs one direct_node, performing the following\noperations will cause the file to be unrepairable:\n\nunisoc # ./f2fs_io compress test.apk\nunisoc #df -h | grep dm-48\n/dev/block/dm-48 112G 112G 1.2M 100% /data\n\nunisoc # ./f2fs_io release_cblocks test.apk\n924\nunisoc # df -h | grep dm-48\n/dev/block/dm-48 112G 112G 4.8M 100% /data\n\nunisoc # dd if=/dev/random of=file4 bs=1M count=3\n3145728 bytes (3.0 M) copied, 0.025 s, 120 M/s\nunisoc # df -h | grep dm-48\n/dev/block/dm-48 112G 112G 1.8M 100% /data\n\nunisoc # ./f2fs_io reserve_cblocks test.apk\nF2FS_IOC_RESERVE_COMPRESS_BLOCKS failed: No space left on device\n\nadb reboot\nunisoc # df -h  | grep dm-48\n/dev/block/dm-48             112G 112G   11M 100% /data\nunisoc # ./f2fs_io reserve_cblocks test.apk\n0\n\nThis is because the file has only one direct_node. After returning\nto -ENOSPC, reserved_blocks += ret will not be executed. As a result,\nthe reserved_blocks at this time is still 0, which is not the real\nnumber of reserved blocks. Therefore, fsck cannot be set to repair\nthe file.\n\nAfter this patch, the fsck flag will be set to fix this problem.\n\nunisoc # df -h | grep dm-48\n/dev/block/dm-48             112G 112G  1.8M 100% /data\nunisoc # ./f2fs_io reserve_cblocks test.apk\nF2FS_IOC_RESERVE_COMPRESS_BLOCKS failed: No space left on device\n\nadb reboot then fsck will be executed\nunisoc # df -h  | grep dm-48\n/dev/block/dm-48             112G 112G   11M 100% /data\nunisoc # ./f2fs_io reserve_cblocks test.apk\n924"
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}


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