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prevent access violation from iob in Memory::IsValidVirtualAddress

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Andrew Strelsky 2021-09-29 07:54:59 -04:00
parent 781c1d8df8
commit 4ce0a650d1
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1 changed files with 5 additions and 1 deletions
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6
src/core/memory.cpp
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@ -587,7 +587,11 @@ void Memory::UnmapRegion(Common::PageTable& page_table, VAddr base, u64 size) {
bool Memory::IsValidVirtualAddress(const VAddr vaddr) const { bool Memory::IsValidVirtualAddress(const VAddr vaddr) const {
const Kernel::KProcess& process = *system.CurrentProcess(); const Kernel::KProcess& process = *system.CurrentProcess();
const auto& page_table = process.PageTable().PageTableImpl(); const auto& page_table = process.PageTable().PageTableImpl();
const auto [pointer, type] = page_table.pointers[vaddr >> PAGE_BITS].PointerType(); const size_t page = vaddr >> PAGE_BITS;
if (page >= page_table.pointers.size()) {
return false;
}
const auto [pointer, type] = page_table.pointers[page].PointerType();
return pointer != nullptr || type == Common::PageType::RasterizerCachedMemory; return pointer != nullptr || type == Common::PageType::RasterizerCachedMemory;
} }