CVE-2024-26869

Published: April 18, 2024Last modified: April 18, 2024

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to truncate meta inode pages forcely Below race case can cause data corruption: Thread A GC thread - gc_data_segment - ra_data_block - locked meta_inode page - f2fs_inplace_write_data - invalidate_mapping_pages : fail to invalidate meta_inode page due to lock failure or dirty|writeback status - f2fs_submit_page_bio : write last dirty data to old blkaddr - move_data_block - load old data from meta_inode page - f2fs_submit_page_write : write old data to new blkaddr Because invalidate_mapping_pages() will skip invalidating page which has unclear status including locked, dirty, writeback and so on, so we need to use truncate_inode_pages_range() instead of invalidate_mapping_pages() to make sure meta_inode page will be dropped.

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References

• https://git.kernel.org/stable/c/04226d8e3c4028dc451e9d8777356ec0f7919253
• https://git.kernel.org/stable/c/77bfdb89cc222fc7bfe198eda77bdc427d5ac189
• https://git.kernel.org/stable/c/9f0c4a46be1fe9b97dbe66d49204c1371e3ece65
• https://git.kernel.org/stable/c/c92f2927df860a60ba815d3ee610a944b92a8694