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[subset] clamp head *Min/*Max values to fit within 16 bit signed int.

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Fixes fuzzer https://oss-fuzz.com/testcase-detail/4549472192692224.
This commit is contained in:
Garret Rieger 2023-05-02 00:06:08 +00:00 • committed by Behdad Esfahbod
parent a8b8eb53c3
commit db23be642f
2 changed files with 7 additions and 4 deletions
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11
src/OT/glyf/Glyph.hh
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@ -168,10 +168,13 @@ struct Glyph
}
}
int rounded_xMin = roundf (xMin);
int rounded_xMax = roundf (xMax);
int rounded_yMin = roundf (yMin);
int rounded_yMax = roundf (yMax);
// These are destined for storage in a 16 bit field to clamp the values to
// fit into a 16 bit signed integer.
int rounded_xMin = hb_clamp (roundf (xMin), -32768.0f, 32767.0f);
int rounded_xMax = hb_clamp (roundf (xMax), -32768.0f, 32767.0f);
int rounded_yMin = hb_clamp (roundf (yMin), -32768.0f, 32767.0f);
int rounded_yMax = hb_clamp (roundf (yMax), -32768.0f, 32767.0f);
update_mtx (plan, rounded_xMin, rounded_xMax, rounded_yMin, rounded_yMax, all_points);

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test/fuzzing/fonts/clusterfuzz-testcase-minimized-hb-subset-fuzzer-4549472192692224 Normal file
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