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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 - Kernel oops when inserting an element into a map"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1096">1096</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Kernel oops when inserting an element into a map
</td>
</tr>
<tr>
<th>Product</th>
<td>nftables
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>x86_64
</td>
</tr>
<tr>
<th>OS</th>
<td>other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>critical
</td>
</tr>
<tr>
<th>Priority</th>
<td>P5
</td>
</tr>
<tr>
<th>Component</th>
<td>kernel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>pablo@netfilter.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dalegaard@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=485" name="attach_485" title="dmesg log from kernel oops">attachment 485</a> <a href="attachment.cgi?id=485&action=edit" title="dmesg log from kernel oops">[details]</a></span>
dmesg log from kernel oops
The following ruleset, when loaded with 'nft -f bad.txt', results in a kernel
oops:
----snip----
flush ruleset
table ip inlinenat {
map sourcemap {
type ipv4_addr : verdict;
}
chain postrouting {
ip saddr vmap @sourcemap accept
}
}
add chain inlinenat test
add element inlinenat sourcemap { 100.123.10.2 : jump test }
----snip----
If the element and chain are inserted as part of the table statement everything
works:
----snip----
flush ruleset
table ip inlinenat {
map sourcemap {
type ipv4_addr : verdict;
elements = {
0.0.0.0 : jump test
}
}
chain test {
}
chain postrouting {
ip saddr vmap @sourcemap accept
}
}
----snip----
However, adding another element afterwards will then fail just as in the first
case.
A dmesg log from the oops is attached. I can reproduce this 100% of the time on
Arch Linux running kernel:
Linux dalegaard-t460s 4.8.4-1-ARCH #1 SMP PREEMPT x86_64 GNU/Linux
nft version is 0.6.</pre>
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