[postgis-tickets] [PostGIS] #3980: [SFCGAL] Potential access to freed memory

[PostGIS]

#3980: [SFCGAL] Potential access to freed memory
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  Reporter:  lucasvr  |      Owner:  colivier
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 2.4.3
 Component:  sfcgal   |    Version:  2.4.x
Resolution:           |   Keywords:
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Comment (by strk):

 All memory in PosgreSQL is allocated in "pools"
 and the DETOAST memory pool will be freed up
 upon elog(ERROR, ...) so that's not a problem.

 I guess POSTGIS2SFCGALGeometry will fully copy
 the data to SFCGAL representation, so there's
 no problem freening the input after that,
 it's just lwgeom_from_gserialized that holds
 references to serialized memory.

 BTW, the patch does not apply cleanly to
 current trunk nor to current tip of 2.4
 branch

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/3980#comment:3>
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