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:
[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.
git.kernel.org/stable/c/29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee
git.kernel.org/stable/c/3ccf5210dc941a7aa0180596ac021568be4d35ec
git.kernel.org/stable/c/5268241b41b1c5d0acca75e9b97d4fd719251c8c
git.kernel.org/stable/c/8acae047215024d1ac499b3c8337ef1b952f160b
git.kernel.org/stable/c/9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d
git.kernel.org/stable/c/b8962cf98595d1ec62f40f23667de830567ec8bc
security-tracker.debian.org/tracker/CVE-2024-33847