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<base href="https://bugzilla.netfilter.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - On chain sreation with elements, after deletion no longer ACCEPT - it is DROP"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1494">1494</a>
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<th>Summary</th>
<td>On chain sreation with elements, after deletion no longer ACCEPT - it is DROP
</td>
</tr>
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<th>Product</th>
<td>libnftnl
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>i386
</td>
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<th>OS</th>
<td>Debian GNU/Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P5
</td>
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<th>Component</th>
<td>libnftnl
</td>
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<th>Assignee</th>
<td>pablo@netfilter.org
</td>
</tr>
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<th>Reporter</th>
<td>hell@fibermax.bg
</td>
</tr></table>
<p>
<div>
<pre>nftables RACE CONDITION
chain main (accept)
rule chain main vmap ip saddr W,Z goto H,Y
create chain H
create chain Y
chain H rule ip saddr W...counter DROP
chain H rule ip saddr Z.. counter ACCEPT
flush chain H
flush chain Y
chain H rule ip saddr W...counter ACCEPT
chain H rule ip saddr Z.. counter DROP
now rule saddr Z will not work or other way around.</pre>
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