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Kernel: Round up ranges to page size multiples in munmap and mprotect

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This prevents passing bad inputs to RangeAllocator who then asserts.

Found by fuzz-syscalls. :^)
This commit is contained in:
Andreas Kling 2021-02-13 00:47:47 +01:00
parent e1dbf74f15
commit 7551090056
2 changed files with 18 additions and 10 deletions
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5
Kernel/VM/MemoryManager.h
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@ -265,6 +265,11 @@ inline bool is_user_range(VirtualAddress vaddr, size_t size)
return is_user_address(vaddr) && is_user_address(vaddr.offset(size));
}
inline bool is_user_range(const Range& range)
{
return is_user_range(range.base(), range.size());
}
inline bool PhysicalPage::is_shared_zero_page() const
{
return this == &MM.shared_zero_page();