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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 - nft segfault on overlapping intervals"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1361">1361</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>nft segfault on overlapping intervals
</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>
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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>
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<th>Component</th>
<td>nft
</td>
</tr>
<tr>
<th>Assignee</th>
<td>pablo@netfilter.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>arturo@debian.org
</td>
</tr></table>
<p>
<div>
<pre>Bug reported in the Debian bug tracker:
<a href="https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=932878">https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=932878</a>
Original message follows:
While studying RFC 4890 I ran into parsing problems.
I have narrowed it down to the ruleset below.
Note the typo ("174" should be "147") results in overlapping intervals
with conflicting verdicts.
I think this should result in an error rather than a segfault.
#!/usr/sbin/nft --file
delete chain inet x y
table inet x {
chain y {
icmpv6 type vmap {
144 - 174 : accept,
154 - 199 : drop,
}
}
}
PID: 8941 (nft)
UID: 0 (root)
GID: 0 (root)
Signal: 11 (SEGV)
Timestamp: Wed 2019-07-24 14:37:13 AEST (45s ago)
Command Line: nft --file tmp.nft
Executable: /usr/sbin/nft
Control Group: /user.slice/user-0.slice/session-25.scope
Unit: session-25.scope
Slice: user-0.slice
Session: 25
Owner UID: 0 (root)
Boot ID: d7a30c4dec804cd08fbd79e513dfbc16
Machine ID: ee3c68006daf4086b06772170d63f3f6
Hostname: not-omega
Storage:
/var/lib/systemd/coredump/core.nft.0.d7a30c4dec804cd08fbd79e513dfbc16.8941.1563943033000000.lz4
Message: Process 8941 (nft) of user 0 dumped core.
Stack trace of thread 8941:
#0 0x00007f1d5d9fb39b set_to_intervals (libnftables.so.1)
#1 0x00007f1d5d9dcd2f n/a (libnftables.so.1)
#2 0x00007f1d5d9df2c7 do_command (libnftables.so.1)
#3 0x00007f1d5da02320 n/a (libnftables.so.1)
#4 0x00007f1d5da02cdc nft_run_cmd_from_filename
(libnftables.so.1)
#5 0x00005637f2eaa5f0 main (nft)
#6 0x00007f1d5d73809b __libc_start_main (libc.so.6)
#7 0x00005637f2eaa68a _start (nft)</pre>
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