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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Asan UAF crash"
   href="https://bugs.webkit.org/show_bug.cgi?id=181185">181185</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Asan UAF crash
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Local Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>macOS 10.13
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Critical
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>New Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>zhanghanming@360.cn
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Created <span class=""><a href="attachment.cgi?id=330240" name="attach_330240" title="poc for trigger this issue">attachment 330240</a> <a href="attachment.cgi?id=330240&action=edit" title="poc for trigger this issue">[details]</a></span>
poc for trigger this issue

I would like to submit a Use-After-Free issue for webkit.
For this is a UAF issue, so I set severity to Critical.If it is not a critical issue, feel free to change it.
If you need any further infomation to reproduce this issue, please let me know.

My test environment:
    a release-asan build webkit (build from 12-29 github source code) and it's version is 11.0.2 (13604.4.7.1.3, 605+)

step to reproduce this issue:
    1. download attached poc.html.
    2. open it with a release-asan build webkit.
    3. asan should detect a UAF happened.

attached file:
    1. poc.html -- a html file will demo this issue.
    2. asan.txt -- asan output on my local test environment.</pre>
        </div>
      </p>


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