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++ From: Jonas Karlsson <jonas.karlsson@qt.io>
++ Subject: [PATCH] PhysX: Fix uninitialized variable in the RTree midphase
++
++ The two argument processResults() passes an uninitialized float as the
++ newMaxT in/out parameter of the three argument one, which reads it before
++ writing it, both to shrink the ray distance and to clamp what a hit
++ callback returns. Whether that garbage is smaller than a real hit
++ distance decides whether the raycast keeps looking, so the results depend
++ on the stack contents.
++
++ This is the RTree half of the PhysX 4.1 patch "Fix Uninitialized
++ Variables", forward ported to 5.9.0. Its other half, the uninitialized
++ bool array in GuPCMTriangleContactGen.cpp, has been fixed upstream.
++ ---
++ src/3rdparty/PhysX/source/geomutils/src/mesh/GuMidphaseRTree.cpp | 2 +-
++ 1 file changed, 1 insertion(+), 1 deletion(-)
++
++ diff --git a/src/3rdparty/PhysX/source/geomutils/src/mesh/GuMidphaseRTree.cpp b/src/3rdparty/PhysX/source/geomutils/src/mesh/GuMidphaseRTree.cpp
++ --- a/src/3rdparty/PhysX/source/geomutils/src/mesh/GuMidphaseRTree.cpp
++ +++ b/src/3rdparty/PhysX/source/geomutils/src/mesh/GuMidphaseRTree.cpp
++ @@ -234,7 +234,7 @@ struct RayRTreeCallback : RTree::CallbackRaycast, RTree::Callback
++
++ virtual bool processResults(PxU32 numTouched, PxU32* touched) PX_OVERRIDE
++ {
++ - PxF32 dummy;
++ + PxF32 dummy = 0;
++ return RayRTreeCallback::processResults(numTouched, touched, dummy);
++ }
++