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    <lastBuildDate>Thu, 01 Oct 2026 01:50:39 +0000</lastBuildDate>
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      <title>CVE-2023-54311 — ext4: fix deadlock when converting an inline directory in nojournal mode</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2023-54311</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;ext4: fix deadlock when converting an inline directory in nojournal mode&lt;/p&gt;
&lt;p&gt;In no journal mode, ext4_finish_convert_inline_dir() can self-deadlock
by calling ext4_handle_dirty_dirblock() when it already has taken the
directory lock.  There is a similar self-deadlock in
ext4_incvert_inline_data_nolock() for data files which we&amp;#39;ll fix at
the same time.&lt;/p&gt;
&lt;p&gt;A simple reproducer demonstrating the problem:&lt;/p&gt;
&lt;p&gt;mke2fs -Fq -t ext2 -O inline_data -b 4k /dev/vdc 64
    mount -t ext4 -o dirsync /dev/vdc /vdc
    cd /vdc
    mkdir file0
    cd file0
    touch file0
    touch file1
    attr -s BurnSpaceInEA -V abcde .
    touch supercalifragilisticexpialidocious&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;ext4: fix deadlock when converting an inline directory in nojournal mode&lt;/p&gt;
&lt;p&gt;In no journal mode, ext4_finish_convert_inline_dir() can self-deadlock
by calling ext4_handle_dirty_dirblock() when it already has taken the
directory lock.  There is a similar self-deadlock in
ext4_incvert_inline_data_nolock() for data files which we&amp;#39;ll fix at
the same time.&lt;/p&gt;
&lt;p&gt;A simple reproducer demonstrating the problem:&lt;/p&gt;
&lt;p&gt;mke2fs -Fq -t ext2 -O inline_data -b 4k /dev/vdc 64
    mount -t ext4 -o dirsync /dev/vdc /vdc
    cd /vdc
    mkdir file0
    cd file0
    touch file0
    touch file1
    attr -s BurnSpaceInEA -V abcde .
    touch supercalifragilisticexpialidocious&lt;/p&gt;</content:encoded>
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