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Guard GPS solver node reads

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Salt
2026-06-26 22:57:23 -05:00
parent b56937291f
commit 73efef2cdf
4 changed files with 175 additions and 9 deletions
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red4ext/EdgeWeightGPS/src/Main.cpp
+11 -9
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@@ -210,6 +210,7 @@ constexpr uint16_t kTrafficLaneFlagGpsOnly = 0x0200;
constexpr uint16_t kTrafficLaneFlagNoAiDriving = 0x2000;
constexpr uint16_t kTrafficLaneFlagHighway = 0x4000;
constexpr uint16_t kTrafficLaneFlagNoAutodrive = 0x8000;
constexpr uintptr_t kMinimumReadableAddress = 0x10000;
constexpr float kGpsSolverHighwayMultiplier = 0.35f;
constexpr float kGpsSolverGpsOnlyMultiplier = 1.10f;
constexpr float kGpsSolverPavementMultiplier = 1.25f;
@@ -927,7 +928,7 @@ bool IsReadableMemory(const void* aPointer, size_t aSize)
const auto begin = reinterpret_cast<uintptr_t>(aPointer);
const auto end = begin + aSize;
if (end < begin)
if (begin < kMinimumReadableAddress || end < begin)
{
return false;
}
@@ -4878,18 +4879,19 @@ float DetourGpsNodeMultiplier(void* aJob, void* aNode)
}
uint32_t mode = 0;
uint16_t nodeFlags = 0;
const auto jobAddress = reinterpret_cast<uintptr_t>(aJob);
const auto nodeAddress = reinterpret_cast<uintptr_t>(aNode);
const auto hasMode = aJob && TryReadMemory(reinterpret_cast<const void*>(jobAddress + 0xC4), mode);
const auto hasFlags = aNode && TryReadMemory(reinterpret_cast<const void*>(nodeAddress + 0x88), nodeFlags);
if (hasMode && hasFlags && mode == 2 && std::isfinite(result))
if (hasMode && mode == 2 && std::isfinite(result))
{
const auto patchMultiplier = GpsSolverNodeWeightMultiplier(nodeFlags);
if (patchMultiplier != 1.0f)
uint16_t nodeFlags = 0;
const auto nodeAddress = reinterpret_cast<uintptr_t>(aNode);
if (aNode && TryReadMemory(reinterpret_cast<const void*>(nodeAddress + 0x88), nodeFlags))
{
result *= patchMultiplier;
const auto patchMultiplier = GpsSolverNodeWeightMultiplier(nodeFlags);
if (patchMultiplier != 1.0f)
{
result *= patchMultiplier;
}
}
}