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Don't grant executable privilege to non-executable data when unprotecting

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Silent 2017-10-05 15:32:02 +02:00
parent 4827c94a98
commit 90590af639
1 changed files with 2 additions and 1 deletions
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3
SilentPatch/MemoryMgr.h
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@ -656,7 +656,8 @@ namespace ScopedUnprotect
if ( MemoryInf.State == MEM_COMMIT && (MemoryInf.Type & MEM_IMAGE) != 0 && if ( MemoryInf.State == MEM_COMMIT && (MemoryInf.Type & MEM_IMAGE) != 0 &&
(MemoryInf.Protect & (PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY|PAGE_READWRITE|PAGE_WRITECOPY)) == 0 ) (MemoryInf.Protect & (PAGE_EXECUTE_READWRITE|PAGE_EXECUTE_WRITECOPY|PAGE_READWRITE|PAGE_WRITECOPY)) == 0 )
{ {
VirtualProtect( MemoryInf.BaseAddress, MemoryInf.RegionSize, PAGE_EXECUTE_READWRITE, &dwOldProtect ); const bool wasExecutable = (MemoryInf.Protect & (PAGE_EXECUTE|PAGE_EXECUTE_READ)) != 0;
VirtualProtect( MemoryInf.BaseAddress, MemoryInf.RegionSize, wasExecutable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE, &dwOldProtect );
m_queriedProtects.emplace_front( MemoryInf.BaseAddress, MemoryInf.RegionSize, MemoryInf.Protect ); m_queriedProtects.emplace_front( MemoryInf.BaseAddress, MemoryInf.RegionSize, MemoryInf.Protect );
} }
QueriedSize += MemoryInf.RegionSize; QueriedSize += MemoryInf.RegionSize;