https://b17fr13nds.github.io/tags/allocator/Recent content in Allocator on bitfriends' blogHugoenSun, 01 Mar 2026 23:49:32 +0700https://b17fr13nds.github.io/posts/lake_snalloc/Sun, 01 Mar 2026 23:49:32 +0700https://b17fr13nds.github.io/posts/lake_snalloc/<h2 id="overview"> Overview <a class="heading-link" href="#overview"> <i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"></i> <span class="sr-only">Link to heading</span> </a> </h2> <p>This was an heap challenge with a custom allocator implementation. The main program basically let you allocate, edit and free chunks using either the custom allocator or the malloc allocator.</p> <hr> <h2 id="vulnerability"> Vulnerability <a class="heading-link" href="#vulnerability"> <i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"></i> <span class="sr-only">Link to heading</span> </a> </h2> <h3 id="snalloc-internals"> Snalloc Internals <a class="heading-link" href="#snalloc-internals"> <i class="fa-solid fa-link" aria-hidden="true" title="Link to heading"></i> <span class="sr-only">Link to heading</span> </a> </h3> <p>In the snallloc implementation, glibc malloc is still used as the &ldquo;buddy&rdquo; allocator. It is exclusively used to request blocks of memory that are multiple of <code>PAGESIZE</code> in size.</p>