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CVE-2023-52682

Disclosure Date: May 17, 2024
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Description

In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix to wait on block writeback for post_read case

If inode is compressed, but not encrypted, it missed to call
f2fs_wait_on_block_writeback() to wait for GCed page writeback
in IPU write path.

Thread A GC-Thread

				- f2fs_gc
				 - do_garbage_collect
				  - gc_data_segment
				   - move_data_block
				    - f2fs_submit_page_write
				     migrate normal cluster's block via
				     meta_inode's page cache
  • f2fs_write_single_data_page
    • f2fs_do_write_data_page
    • f2fs_inplace_write_data
    • f2fs_submit_page_bio

IRQ

  • f2fs_read_end_io
    IRQ
    old data overrides new data due to
    out-of-order GC and common IO.
    – f2fs_read_end_io

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General Information

Vendors

  • Linux

Products

  • Linux
Technical Analysis