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    <lastBuildDate>Mon, 28 Sep 2026 23:51:55 +0000</lastBuildDate>
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      <title>CVE-2023-54185 — btrfs: remove BUG_ON()'s in add_new_free_space()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2023-54185</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;btrfs: remove BUG_ON()&amp;#39;s in add_new_free_space()&lt;/p&gt;
&lt;p&gt;At add_new_free_space() we have these BUG_ON()&amp;#39;s that are there to deal
with any failure to add free space to the in memory free space cache.
Such failures are mostly -ENOMEM that should be very rare. However there&amp;#39;s
no need to have these BUG_ON()&amp;#39;s, we can just return any error to the
caller and all callers and their upper call chain are already dealing with
errors.&lt;/p&gt;
&lt;p&gt;So just make add_new_free_space() return any errors, while removing the
BUG_ON()&amp;#39;s, and returning the total amount of added free space to an
optional u64 pointer argument.&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;btrfs: remove BUG_ON()&amp;#39;s in add_new_free_space()&lt;/p&gt;
&lt;p&gt;At add_new_free_space() we have these BUG_ON()&amp;#39;s that are there to deal
with any failure to add free space to the in memory free space cache.
Such failures are mostly -ENOMEM that should be very rare. However there&amp;#39;s
no need to have these BUG_ON()&amp;#39;s, we can just return any error to the
caller and all callers and their upper call chain are already dealing with
errors.&lt;/p&gt;
&lt;p&gt;So just make add_new_free_space() return any errors, while removing the
BUG_ON()&amp;#39;s, and returning the total amount of added free space to an
optional u64 pointer argument.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/cve-2023-54185</guid>
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