[postgis-devel] [PostGIS] #494: [wktraster] ST_DumpAsPolygons crashes under MingW compiled wktraster (gdal)

[Jorge Arevalo]

On Wed, Apr 21, 2010 at 8:50 PM, PostGIS <trac at osgeo.org> wrote:
> #494: [wktraster] ST_DumpAsPolygons crashes under MingW compiled wktraster (gdal)
> ------------------------+---------------------------------------------------
>  Reporter:  robe       |       Owner:  pracine
>      Type:  defect     |      Status:  new
>  Priority:  medium     |   Milestone:  WKTRaster 0.1.6
>  Component:  wktraster  |     Version:  trunk
> Resolution:             |    Keywords:
> ------------------------+---------------------------------------------------
> Comment (by pracine):
>
>  The crash happen in GDAL-MEMRasterBand::IReadBlock:
>
>  memcpy( pImage, pabyData + nLineOffset*(size_t)nBlockYOff, nPixelOffset *
>  nBlockXSize );
>
>  Any idea?
>

I think so. When creating a new GDALRasterBand in
rt_raster_dump_as_wktpolygons, there was a static array to store the
data. It was a clear error (my fault, of course, and I'm really
sorry), that could produce access violation if the band data are
bigger than the array size.

Now, the memory is allocated based on the raster dimensions and the
band datatype. Commited in r5570.

I hope this helps...


> --
> Ticket URL: <http://trac.osgeo.org/postgis/ticket/494#comment:4>
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