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GeezerVison is showing github.com — fixed-size arrays of size PL_MAXPOLY cause out-of-bound and posible crashes · Issue #6 · PLplot/PLplot

fixed-size arrays of size PL_MAXPOLY cause out-of-bound and posible crashes #6

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fixed-size arrays of size PL_MAXPOLY cause out-of-bound and posible crashes#6
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@GillesDuvert
GillesDuvert
opened on Sep 5, 2023
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xscl and yscl , used by difilt(), are of size PL_MAXPOLY whereas their contents can be of any size, (see line 534 of plcore) causing invalid memory access and code corruption.
This is most visible when drawing a filled area of a shape of size > PL_MAXPOLY on the postscript driver, that triggers difilt() due to its (IMHO too complicated) coordinate conversions.

this is a copy of the seemingly unmaintained https://sourceforge.net/p/plplot/bugs/203/

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