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Cheats: Clamp pointer command data to avail.

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In case more data is provided, as was allowed before.
This commit is contained in:
Unknown W. Brackets 2017-11-08 17:48:33 -08:00
parent 0ed62cfe30
commit baf351c372
1 changed files with 4 additions and 4 deletions
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8
Core/CwCheat.cpp
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@ -495,11 +495,11 @@ CheatOperation CWCheatEngine::InterpretNextCwCheat(const CheatCode &cheat, size_
addr = GetAddress(line1.part1 & 0x0FFFFFFF);
if (i < cheat.lines.size()) {
const CheatLine &line2 = cheat.lines[i++];
const int count = line2.part1 & 0xFFFF;
int count = line2.part1 & 0xFFFF;
// Doesn't have enough lines to process.
if (i - 1 + count > cheat.lines.size())
return { CheatOp::Invalid };
// Clamp lines to process - previously allowed invalid counts.
if (i + count > cheat.lines.size())
count = cheat.lines.size() - i;
CheatOperation op = { CheatOp::CwCheatPointerCommands, addr, 0, arg };
op.pointerCommands.offset = (int)line2.part2;