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check number of blends against args on stack

This commit is contained in:
Michiharu Ariza 2018-12-05 21:33:29 -08:00
parent 6727c4b6f0
commit 14d29a1043
1 changed files with 5 additions and 0 deletions
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5
src/hb-cff2-interp-cs.hh
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@ -235,6 +235,11 @@ struct CFF2CSOpSet : CSOpSet<BlendArg, OPSET, CFF2CSInterpEnv, PARAM, PATH>
env.process_blend ();
k = env.get_region_count ();
n = env.argStack.pop_uint ();
if (unlikely (env.argStack.get_count () < ((k+1) * n)))
{
env.set_error ();
return;
}
/* copy the blend values into blend array of the default values */
unsigned int start = env.argStack.get_count () - ((k+1) * n);
for (unsigned int i = 0; i < n; i++)