memory: Return false for large VAddr in IsValidVirtualAddress

2018-01-20 14:56:15 +07:00 · 2018-01-20 14:56:15 +07:00 · de7aa3106a
parent c8a094e164
commit de7aa3106a
1 changed files with 3 additions and 0 deletions
--- a/src/core/memory.cpp
+++ b/src/core/memory.cpp
@ -219,6 +219,9 @@ void Write(const VAddr vaddr, const T data) {
 bool IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr) {
    auto& page_table = process.vm_manager.page_table;

+    if ((vaddr >> PAGE_BITS) >= PAGE_TABLE_NUM_ENTRIES)
+        return false;
+
    const u8* page_pointer = page_table.pointers[vaddr >> PAGE_BITS];
    if (page_pointer)
        return true;