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<base href="https://bugzilla.netfilter.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - v0.9.0: segfault when using nft -f <file> and issuing "ruleset flush" twice"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1424">1424</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>v0.9.0: segfault when using nft -f <file> and issuing "ruleset flush" twice
</td>
</tr>
<tr>
<th>Product</th>
<td>nftables
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
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<th>OS</th>
<td>Debian GNU/Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P5
</td>
</tr>
<tr>
<th>Component</th>
<td>nft
</td>
</tr>
<tr>
<th>Assignee</th>
<td>pablo@netfilter.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eexexiexit@riseup.net
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=591" name="attach_591" title="strace output of the script that segfaults">attachment 591</a> <a href="attachment.cgi?id=591&action=edit" title="strace output of the script that segfaults">[details]</a></span>
strace output of the script that segfaults
Disclaimer: I am totally new to nftable, so forbid my stupidity.
Running this file segfaults on two of my machines (both debian stable
"buster"):
/tmp/test:
#!/usr/sbin/nft -f
flush ruleset
create table inet fw
list table inet fw
flush ruleset
the same command sequence runs smoothly when issued interactively.
kernel message:
[ 8841.187933] show_signal_msg: 12 callbacks suppressed
[ 8841.187936] test[17806]: segfault at 10 ip 00007f175a76929b sp
00007ffc67e5c940 error 4 in libnftables.so.0.0.0[7f175a763000+47000]
[ 8841.190580] Code: ff 48 8b 44 24 28 64 48 33 04 25 28 00 00 00 75 06 48 83
c4 30 5b c3 e8 53 a9 ff ff 0f 1f 00 41 56 41 55 41 54 49 89 fc 55 53 <8b> 7f 10
48 89 f3 e8 2a be ff ff 49 8b 4c 24 40 48 8d 35 e9 0f 04
Segmentation fault
uname -a:
Linux something 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5+deb10u2 (2019-08-08)
x86_64 GNU/Linux
Linux otherthing 4.19.0-8-686-pae #1 SMP Debian 4.19.98-1 (2020-01-26) i686
GNU/Linux
/usr/sbin/nft --version:
nftables v0.9.0 (Fearless Fosdick)
strace is attached.</pre>
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