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Kernel: Sanity check the VM range when constructing a Region

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This should help us catch bogus VM ranges ending up in a process's
address space sooner.
This commit is contained in:
Andreas Kling 2021-02-13 01:16:57 +01:00
parent 62f0f73bf0
commit a5def4e98c
1 changed files with 4 additions and 0 deletions
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4
Kernel/VM/Region.cpp
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@ -49,6 +49,10 @@ Region::Region(const Range& range, NonnullRefPtr<VMObject> vmobject, size_t offs
, m_cacheable(cacheable) , m_cacheable(cacheable)
, m_kernel(kernel) , m_kernel(kernel)
{ {
ASSERT(m_range.base().is_page_aligned());
ASSERT(m_range.size());
ASSERT((m_range.size() % PAGE_SIZE) == 0);
m_vmobject->ref_region(); m_vmobject->ref_region();
register_purgeable_page_ranges(); register_purgeable_page_ranges();
MM.register_region(*this); MM.register_region(*this);