Fix CVE-2016-5296: Heap-buffer-overflow WRITE in rasterize_edges_1 Adapted for upstream pixman based on: https://hg.mozilla.org/releases/mozilla-esr45/rev/5e39c1c2fded --- pixman-0.34.0/pixman/pixman-edge-imp.h.orig 2015-06-30 05:48:31.000000000 -0400 +++ pixman-0.34.0/pixman/pixman-edge-imp.h 2016-11-16 01:09:34.046335106 -0500 @@ -55,8 +55,9 @@ * * (The AA case does a similar adjustment in RENDER_SAMPLES_X) */ - lx += X_FRAC_FIRST(1) - pixman_fixed_e; - rx += X_FRAC_FIRST(1) - pixman_fixed_e; + /* we cast to unsigned to get defined behaviour for overflow */ + lx = (unsigned)lx + X_FRAC_FIRST(1) - pixman_fixed_e; + rx = (unsigned)rx + X_FRAC_FIRST(1) - pixman_fixed_e; #endif /* clip X */ if (lx < 0) ko' selected='selected'>koszko
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