[gdal-dev] Crash on cancel overviews creation

[Javier Jimenez Shaw]

Thanks Even

We tested your patch and we were not able to crash it. It looks like fixed
:)
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Entre dos pensamientos racionales
hay infinitos pensamientos irracionales.



On Thu, 26 Aug 2021 at 19:02, Even Rouault <even.rouault at spatialys.com>
wrote:

> Javier,
>
> Hopefully https://github.com/OSGeo/gdal/pull/4347 should solve that
>
> Even
> Le 26/08/2021 à 18:45, Javier Jimenez Shaw a écrit :
>
> Hi
>
> Some times (unfortunately it is not reproducible every time) we got a
> crash when we cancel the overview generation.
> I tried to reproduce it in my Ubuntu 20.04, but couldn't. My colleagues
> are able to reproduce some times on Mac and Windows.
>
> In C++, with GDAL 3.3.1, calling BuildOverviews("AVERAGE", ...) to produce
> embedded overview and calling the cancel callback, it crashes on
> overviews.cpp:
>
> ~PointerHolder() { CPLFree(ptr); }. (line 3929)
> The reason of the crash is : Thread 34: EXC_BAD_ACCESS (code=1,
> address=0x1d)
> Yes, the debugger says the value of "ptr" is 0x1d... that does not make so
> much sense.
>
> the debugger shows this steps on the back trace:
> poJob->oDstBufferHolder.reset(new PointerHolder(poJob->pDstBuffer));
> (line 4930)
> GDALRegenerateOverviewsMultiBand (line 4638)
>
>
> Before calling to BuildOverviews I am calling
> CPLSetConfigOption("GDAL_NUM_THREADS", "ALL_CPUS");
> to make it multithreaded.
>
> The image is an RGBA 8bit with JPEG compression.
>
> Is anything wrong there?
>
> Thanks.
> .___ ._ ..._ .. . ._.  .___ .. __ . _. . __..  ... .... ._ .__
> Entre dos pensamientos racionales
> hay infinitos pensamientos irracionales.
>
>
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>
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>
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