Public bug reported:
root@i1:~# cat example.xml
<domain type="qemu">
<name>fake-name</name>
<os>
<type/>
</os>
<devices>
<interface type="bridge">
<mac address="22:52:25:62:e2:aa"/>
<model type="virtio"/>
<source bridge="br0"/>
<mtu size="9000"/>
<target dev="nicdc065497-3c"/>
<bandwidth>
<inbound average="100" peak="200" burst="300"/>
<outbound average="10" peak="20" burst="30"/>
</bandwidth>
</interface>
</devices>
</domain>
root@i1:~# cat xml.py
from lxml import etree
def parseXML(xmlFile):
# Parse the xml
with open(xmlFile) as fobj:
xml = fobj.read()
doc = etree.fromstring(xml)
ret = doc.findall('./devices/interface')
node_xml = etree.tostring(ret[0]).decode()
print("node_xml={}".format(node_xml))
if __name__ == "__main__":
parseXML("example.xml")
== Expected result ==
root@i1:~# python3 xml.py
node_xml=<interface type="bridge">
<mac address="22:52:25:62:e2:aa"/>
<model type="virtio"/>
<source bridge="br0"/>
<mtu size="9000"/>
<target dev="nicdc065497-3c"/>
<bandwidth>
<inbound average="100" peak="200" burst="300"/>
<outbound average="10" peak="20" burst="30"/>
</bandwidth>
</interface>
== Actual Result ==
root@i1:~# python3 xml.py
node_xml=<interface type="bridge">
<mac address="22:52:25:62:e2:aa"/>
<model type="virtio"/>
<source bridge="br0"/>
<mtu size="9000"/>
<target dev="nicdc065497-3c"/>
<bandwidth>
<inbound average="100" peak="200" burst="300"/>
<outbound average="10" peak="20" burst="30"/>
</bandwidth>
</interface>
</devices>
</domain>
This is broken in 2.9.12+dfsg-3 on impish.
It is not broken in 2.9.10+dfsg-6.3ubuntu0.1 on hirsute.
There are some fixes in master since the 2.9.12 release was cut.
https://gitlab.gnome.org/GNOME/libxml2/-/commits/master
I'm planning to pick all 3 of the following commits from upstream master
since they are all intertwined. With this patches the regression is
fixed.
85b1792e37b131e7a51af98a37f92472e8de5f3f:
Work around lxml API abuse. Make xmlNodeDumpOutput and htmlNodeDumpFormatOutput
work with corrupted parent pointers.
13ad8736d294536da4cbcd70a96b0a2fbf47070c:
Add patch from upstream to fix regression in xmlNodeDumpOutputInternal. Commit
85b1792e could cause additional whitespace if xmlNodeDump was called with a
non-zero starting level.
92d9ab4c28842a09ca2b76d3ff2f933e01b6cd6f:
Add patch from upstream to fix whitespace when serializing empty HTML documents.
** Affects: libxml2 (Ubuntu)
Importance: High
Status: Triaged
** Summary changed:
- libxml2 causes regression in python3-lxml2
+ libxml2 2.9.12+dfsg-3 causes regression
** Description changed:
- root@i1:~# cat example.xml
+ root@i1:~# cat example.xml
<domain type="qemu">
- <name>fake-name</name>
- <os>
- <type/>
- </os>
- <devices>
- <interface type="bridge">
- <mac address="22:52:25:62:e2:aa"/>
- <model type="virtio"/>
- <source bridge="br0"/>
- <mtu size="9000"/>
- <target dev="nicdc065497-3c"/>
- <bandwidth>
- <inbound average="100" peak="200" burst="300"/>
- <outbound average="10" peak="20" burst="30"/>
- </bandwidth>
- </interface>
- </devices>
+ <name>fake-name</name>
+ <os>
+ <type/>
+ </os>
+ <devices>
+ <interface type="bridge">
+ <mac address="22:52:25:62:e2:aa"/>
+ <model type="virtio"/>
+ <source bridge="br0"/>
+ <mtu size="9000"/>
+ <target dev="nicdc065497-3c"/>
+ <bandwidth>
+ <inbound average="100" peak="200" burst="300"/>
+ <outbound average="10" peak="20" burst="30"/>
+ </bandwidth>
+ </interface>
+ </devices>
</domain>
-
- root@i1:~# cat xml.py
+ root@i1:~# cat xml.py
from lxml import etree
def parseXML(xmlFile):
- # Parse the xml
- with open(xmlFile) as fobj:
- xml = fobj.read()
+ # Parse the xml
+ with open(xmlFile) as fobj:
+ xml = fobj.read()
- doc = etree.fromstring(xml)
- ret = doc.findall('./devices/interface')
- node_xml = etree.tostring(ret[0]).decode()
- print("node_xml={}".format(node_xml))
+ doc = etree.fromstring(xml)
+ ret = doc.findall('./devices/interface')
+ node_xml = etree.tostring(ret[0]).decode()
+ print("node_xml={}".format(node_xml))
if __name__ == "__main__":
- parseXML("example.xml")
+ parseXML("example.xml")
+ == Expected result ==
- Expected result:
+ root@i1:~# python3 xml.py
+ node_xml=<interface type="bridge">
+ <mac address="22:52:25:62:e2:aa"/>
+ <model type="virtio"/>
+ <source bridge="br0"/>
+ <mtu size="9000"/>
+ <target dev="nicdc065497-3c"/>
+ <bandwidth>
+ <inbound average="100" peak="200" burst="300"/>
+ <outbound average="10" peak="20" burst="30"/>
+ </bandwidth>
+ </interface>
- root@i1:~# python3 xml.py
+ == Actual Result ==
+
+ root@i1:~# python3 xml.py
node_xml=<interface type="bridge">
- <mac address="22:52:25:62:e2:aa"/>
- <model type="virtio"/>
- <source bridge="br0"/>
- <mtu size="9000"/>
- <target dev="nicdc065497-3c"/>
- <bandwidth>
- <inbound average="100" peak="200" burst="300"/>
- <outbound average="10" peak="20" burst="30"/>
- </bandwidth>
- </interface>
-
- Actual Result:
-
- root@i1:~# python3 xml.py
- node_xml=<interface type="bridge">
- <mac address="22:52:25:62:e2:aa"/>
- <model type="virtio"/>
- <source bridge="br0"/>
- <mtu size="9000"/>
- <target dev="nicdc065497-3c"/>
- <bandwidth>
- <inbound average="100" peak="200" burst="300"/>
- <outbound average="10" peak="20" burst="30"/>
- </bandwidth>
- </interface>
- </devices>
+ <mac address="22:52:25:62:e2:aa"/>
+ <model type="virtio"/>
+ <source bridge="br0"/>
+ <mtu size="9000"/>
+ <target dev="nicdc065497-3c"/>
+ <bandwidth>
+ <inbound average="100" peak="200" burst="300"/>
+ <outbound average="10" peak="20" burst="30"/>
+ </bandwidth>
+ </interface>
+ </devices>
</domain>
This is broken in 2.9.12+dfsg-3 on impish.
It is not broken in 2.9.10+dfsg-6.3ubuntu0.1 on hirsute.
There are some fixes in master since the 2.9.12 release was cut.
https://gitlab.gnome.org/GNOME/libxml2/-/commits/master
I'm planning to pick all 3 of these from upstream master since they are all
intertwined. With this patches the regression is fixed.
85b1792e37b131e7a51af98a37f92472e8de5f3f:
Work around lxml API abuse. Make xmlNodeDumpOutput and
htmlNodeDumpFormatOutput work with corrupted parent pointers.
13ad8736d294536da4cbcd70a96b0a2fbf47070c:
Add patch from upstream to fix regression in xmlNodeDumpOutputInternal.
Commit 85b1792e could cause additional whitespace if xmlNodeDump was called
with a non-zero starting level.
92d9ab4c28842a09ca2b76d3ff2f933e01b6cd6f:
Add patch from upstream to fix whitespace when serializing empty HTML
documents.
** Description changed:
root@i1:~# cat example.xml
<domain type="qemu">
<name>fake-name</name>
<os>
<type/>
</os>
<devices>
<interface type="bridge">
<mac address="22:52:25:62:e2:aa"/>
<model type="virtio"/>
<source bridge="br0"/>
<mtu size="9000"/>
<target dev="nicdc065497-3c"/>
<bandwidth>
<inbound average="100" peak="200" burst="300"/>
<outbound average="10" peak="20" burst="30"/>
</bandwidth>
</interface>
</devices>
</domain>
root@i1:~# cat xml.py
from lxml import etree
def parseXML(xmlFile):
# Parse the xml
with open(xmlFile) as fobj:
xml = fobj.read()
doc = etree.fromstring(xml)
ret = doc.findall('./devices/interface')
node_xml = etree.tostring(ret[0]).decode()
print("node_xml={}".format(node_xml))
if __name__ == "__main__":
parseXML("example.xml")
== Expected result ==
root@i1:~# python3 xml.py
node_xml=<interface type="bridge">
<mac address="22:52:25:62:e2:aa"/>
<model type="virtio"/>
<source bridge="br0"/>
<mtu size="9000"/>
<target dev="nicdc065497-3c"/>
<bandwidth>
<inbound average="100" peak="200" burst="300"/>
<outbound average="10" peak="20" burst="30"/>
</bandwidth>
</interface>
== Actual Result ==
root@i1:~# python3 xml.py
node_xml=<interface type="bridge">
<mac address="22:52:25:62:e2:aa"/>
<model type="virtio"/>
<source bridge="br0"/>
<mtu size="9000"/>
<target dev="nicdc065497-3c"/>
<bandwidth>
<inbound average="100" peak="200" burst="300"/>
<outbound average="10" peak="20" burst="30"/>
</bandwidth>
</interface>
</devices>
</domain>
This is broken in 2.9.12+dfsg-3 on impish.
It is not broken in 2.9.10+dfsg-6.3ubuntu0.1 on hirsute.
There are some fixes in master since the 2.9.12 release was cut.
https://gitlab.gnome.org/GNOME/libxml2/-/commits/master
- I'm planning to pick all 3 of these from upstream master since they are all
intertwined. With this patches the regression is fixed.
+
+ I'm planning to pick all 3 of the following commits from upstream master
+ since they are all intertwined. With this patches the regression is
+ fixed.
85b1792e37b131e7a51af98a37f92472e8de5f3f:
Work around lxml API abuse. Make xmlNodeDumpOutput and
htmlNodeDumpFormatOutput work with corrupted parent pointers.
13ad8736d294536da4cbcd70a96b0a2fbf47070c:
Add patch from upstream to fix regression in xmlNodeDumpOutputInternal.
Commit 85b1792e could cause additional whitespace if xmlNodeDump was called
with a non-zero starting level.
92d9ab4c28842a09ca2b76d3ff2f933e01b6cd6f:
Add patch from upstream to fix whitespace when serializing empty HTML
documents.
** Changed in: libxml2 (Ubuntu)
Status: New => Triaged
** Changed in: libxml2 (Ubuntu)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1943277
Title:
libxml2 2.9.12+dfsg-3 causes regression
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