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[orbis-kernel] Check overflow in kalloc

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This commit is contained in:
Ivan Chikish 2023-07-13 16:05:37 +03:00
parent 0e3cbd6627
commit 3c3fcaaea4
1 changed files with 5 additions and 0 deletions
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5
orbis-kernel/src/KernelContext.cpp
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@ -100,6 +100,11 @@ void *KernelContext::kalloc(std::size_t size, std::size_t align) {
heap = (heap + (align - 1)) & ~(align - 1);
auto result = reinterpret_cast<void *>(heap);
m_heap_next = reinterpret_cast<void *>(heap + size);
// Check overflow
if (heap + size < heap)
std::abort();
if (heap + size > (uintptr_t)&g_context + 0x1'0000'0000)
std::abort();
pthread_mutex_unlock(&m_heap_mtx);
return result;
}