[PostGIS] #5912: ST_GeomFromGML crashes when parsing GML with xlink attributes

[PostGIS]

#5912: ST_GeomFromGML crashes when parsing GML with xlink attributes
----------------------------+---------------------------
 Reporter:  dmyzl           |      Owner:  pramsey
     Type:  defect          |     Status:  new
 Priority:  blocker         |  Milestone:  PostGIS 3.5.4
Component:  postgis         |    Version:  3.5.x
 Keywords:  ST_GeomFromGML  |
----------------------------+---------------------------
 The `ST_GeomFromGML` function crashes when parsing GML that contains
 `xlink` attributes. For example, the following SQL causes the server to
 crash:

 {{{
 select st_geomfromgml('<gml:Tin xmlns:xlink="http://www.w3.org/1999/xlink"
 xlink:type="simple" xlink:href="#gml"></gml:Tin>');
 }}}

 postgis_full_version:

 {{{
 POSTGIS="3.5.3 0" [EXTENSION] PGSQL="170" GEOS="3.13.1-CAPI-1.19.2"
 SFCGAL="SFCGAL 1.5.0, CGAL 5.6, BOOST 1.74.0" PROJ="9.3.1
 NETWORK_ENABLED=OFF URL_ENDPOINT=https://cdn.proj.org
 USER_WRITABLE_DIRECTORY=/home/yzl/.local/share/proj
 DATABASE_PATH=/home/yzl/project/build_pg_postgis/proj-9.3.1/tmp_install/share/proj/proj.db"
 (compiled against PROJ 9.3.1) GDAL="GDAL 3.7.2, released 2023/09/05"
 LIBXML="2.9.13" LIBJSON="0.17" LIBPROTOBUF="1.3.3" WAGYU="0.5.0
 (Internal)" (core procs from "3.5.2 dea6d0a" need upgrade) TOPOLOGY
 (topology procs from "3.5.2 dea6d0a" need upgrade) RASTER (raster procs
 from "3.5.2 dea6d0a" need upgrade) (sfcgal procs from "3.5.2 dea6d0a" need
 upgrade)
 }}}
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5912>
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