** Patch added: "debdiff_zlib_lunar_from_1.2.13.dfsg-1ubuntu3_to_1.2.13.dfsg-1ubuntu4.diff" https://bugs.launchpad.net/zlib/+bug/2002511/+attachment/5640780/+files/debdiff_zlib_lunar_from_1.2.13.dfsg-1ubuntu3_to_1.2.13.dfsg-1ubuntu4.diff
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to zlib in Ubuntu. https://bugs.launchpad.net/bugs/2002511 Title: zlib 1.2.13 (and patched 1.2.11) breaks libxml2 on s390x Status in Ubuntu on IBM z Systems: Triaged Status in zlib: In Progress Status in zlib package in Ubuntu: In Progress Status in zlib source package in Focal: New Status in zlib source package in Jammy: New Status in zlib source package in Kinetic: New Status in zlib source package in Lunar: In Progress Bug description: SRU Justification: ------------------ [ Impact ] * zlib version 1.2.13, as well as patched zlib versions 1.2.11 with the patch from LP#1990379, break libxml2 and lxml on s390x. * The problem appears during loading a gzipped XML file. * Disabling hw compression with 'export DFLTCC=0' solves this, hence it's a problem with the hardware acceleration patches DFLTCC. * For more info see: https://bugzilla.redhat.com/show_bug.cgi?id=2155328 [ Test Plan ] * Steps to Reproduce: 1. echo "<a></a>" > file.xml 2. gzip file.xml 3. python3 >>> import libxml2 >>> libxml2.parseFile("file.xml.gz") * Actual results: file.xml.gz:1: parser error : Document is empty ^ Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python3.11/site-packages/libxml2.py", line 1362, in parseFile if ret is None:raise parserError('xmlParseFile() failed') ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ libxml2.parserError: xmlParseFile() failed * Expected results: Loaded file. [ Where problems could occur ] * Since this is limited to s390x and DFLTCC / hw acceleration active, any possible problems are limited to such environments. * Fix can be broken if the state handling (state->wrap), or the states mixed. * The translation from stream to parameter block could be broken (again due to wrong states) and the inflate as well. [ Other Info ] * The official upstream fix is here: https://github.com/zlib-ng/zlib-ng/pull/1390 but it's for zlib-ng. * For zlib this needs to be adjusted and was done by the author here: https://launchpadlibrarian.net/641454325/patch-1.2.11 * And again slightly adjusted by me (renamed, some white-space fixes and conversion into a quilt patch with proper dep3 header): https://launchpadlibrarian.net/645435847/1390.patch * The zlib version in Focal, Jammy, Kinetic and Lunar are affected. __________ It has been reported that 1.2.13 as well as the patch from LP#1990379 breaks libxml2 (and libxml) on s390x: (https://bugzilla.redhat.com/show_bug.cgi?id=2155328). The attached patch should fix the issue. The upstream author proposed a fix and a new test for zlib-ng (https://github.com/zlib-ng/zlib-ng/pull/1390) in order to detect such breakages in the future. ___ This was initially reported as part of LP#1990379, especially: https://bugs.launchpad.net/ubuntu/+source/zlib/+bug/1990379/comments/12 but needs a separate LP bug (number) - this one. ___ The proposed patch at https://launchpadlibrarian.net/641454325/patch-1.2.11 needed some tweaks regarding white-spaces, but then applied fine on focal, jammy, kinetic and also 1.2.13, which is what we currently have in lunar-proposed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/2002511/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
