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    <lastBuildDate>Thu, 01 Oct 2026 11:08:05 +0000</lastBuildDate>
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      <title>CVE-2023-52682 — f2fs: fix to wait on block writeback for post_read case</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2023-52682</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;f2fs: fix to wait on block writeback for post_read case&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;
&lt;p&gt;Thread A				GC-Thread
					- f2fs_gc
					 - do_garbage_collect
					  - gc_data_segment
					   - move_data_block
					    - f2fs_submit_page_write
					     migrate normal cluster&amp;#39;s block via
					     meta_inode&amp;#39;s page cache
- f2fs_write_single_data_page
 - f2fs_do_write_data_page
  - f2fs_inplace_write_data
   - f2fs_submit_page_bio&lt;/p&gt;
&lt;p&gt;IRQ
- f2fs_read_end_io
					IRQ
					old data overrides new data due to
					out-of-order GC and common IO.
					- f2fs_read_end_io&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;f2fs: fix to wait on block writeback for post_read case&lt;/p&gt;
&lt;p&gt;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.&lt;/p&gt;
&lt;p&gt;Thread A				GC-Thread
					- f2fs_gc
					 - do_garbage_collect
					  - gc_data_segment
					   - move_data_block
					    - f2fs_submit_page_write
					     migrate normal cluster&amp;#39;s block via
					     meta_inode&amp;#39;s page cache
- f2fs_write_single_data_page
 - f2fs_do_write_data_page
  - f2fs_inplace_write_data
   - f2fs_submit_page_bio&lt;/p&gt;
&lt;p&gt;IRQ
- f2fs_read_end_io
					IRQ
					old data overrides new data due to
					out-of-order GC and common IO.
					- f2fs_read_end_io&lt;/p&gt;</content:encoded>
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