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Fix free list prev pointer when allocating new block #32

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Fix free list prev pointer when allocating new block #32

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6 changes: 5 additions & 1 deletion mhook-lib/mhook.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -355,8 +355,12 @@ static MHOOKS_TRAMPOLINE* BlockAlloc(PBYTE pSystemFunction, PBYTE pbLower, PBYTE
pRetVal[s].pNextTrampoline = &pRetVal[s + 1];
}

// last entry points to the current head of the free list
// last entry points to the current head of the free list and
// the current head points back to the last entry of the new block
pRetVal[trampolineCount - 1].pNextTrampoline = g_pFreeList;
if (g_pFreeList) {
g_pFreeList->pPrevTrampoline = &pRetVal[trampolineCount - 1];
}
break;
}
}
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