segfault in libgdal1.5.0.so.1.12.2 on ubuntu 8.10

[mzanfardino]

Linux ubuntu-ibex 2.6.27-9-generic #1 SMP Thu Nov 20 21:57:00 UTC 2008 i686 GNU/Linux
MapServer version 5.0.3
Apache/2.2.9 (Ubuntu) built: Sep 19 2008 13:43:21

After installing ubuntu 8.10 (intrepid ibex) and mapserver from repo's several WMS map layers would not render. Apache generate "internal error 500" when attempting to render a specific layer via a browser call to mapserv.

Searching apache2.log revealed "Premature end of script headers: mapserv". Further research in syslog reveals "segfault at bf7a8fec ip b7898d4b sp bf7a8fe0 error 6 in libgdal1.5.0.so.1.12.2[b77d6000+4df000]".

Issued shp2img command to verify error with the following results:

shp2img -m sm.map -l labels_1 png -o labels.png -all_debug 9
msPOSTGISLayerOpen called datastatement: the_geom FROM (SELECT * FROM city WHERE NOT exclude) AS foo USING UNIQUE gid USING SRID=-1
MSPOSTGISLayerOpen -- shared connection not available.
msConnPoolRegister(labels_1,user=postgres password=******** dbname=sm_gis host=localhost port=5432,0x9471210)
msPOSTGISLayerFreeItemInfo called
msPOSTGISLayerInitItemInfo called
msPOSTGISLayerWhichShapes called
msPOSTGISLayerParseData: unique column = gid, srid='-1', geom_column_name = the_geom, table_name=(SELECT * FROM city WHERE NOT exclude) AS foo
query_string_0_6:DECLARE mycursor BINARY CURSOR FOR SELECT "area"::text,"name"::text,asbinary(force_collection(force_2d(the_geom)),'NDR'),gid::text from (SELECT * FROM city WHERE NOT exclude) AS foo WHERE the_geom && setSRID('BOX3D(-122.681423690205 37.34,-122.058576309795 37.71)'::BOX3D, -1 )
msPOSTGISLayerFreeItemInfo called
msPOSTGISLayerClose datastatement: the_geom FROM (SELECT * FROM city WHERE NOT exclude) AS foo USING UNIQUE gid USING SRID=-1
msPOSTGISLayerClose -- closing query_result
msConnPoolRelease(labels_1,user=postgres password=******** dbname=sm_gis host=localhost port=5432,0x9471210)
msConnPoolClose(user=postgres password=1qaz2wsx dbname=sm_gis host=localhost port=5432,0x9471210)
msDrawMap(): Layer 41 (labels_1), 0.788s
Segmentation fault

Replacing libgdal1.5.0.so.1.12.2 (installed from repo's) with libgdal.so.1.12.3 (gdal-1.5.3 built from source) resolved the segment fault; previously failing layers will now render without error.

This does not appear to be strictly a mapserver issue as the solution came from building a more recent version of gdal. This may be better served as a ticket for either gdal or canonical. Please advise.

[unicoletti]

This happens also for the version in trunk. The trace refers to sincos () from /usr/lib/libgdal1.5.0.so.1

[unicoletti]

Not a mapserver problem, but a gdal problem:

​http://trac.osgeo.org/gdal/ticket/2497

solution is upgrade to gdal 1.5.2 or greater. Closing as invalid.