diff options
Diffstat (limited to 'Kernel/VM/RangeAllocator.cpp')
| -rw-r--r-- | Kernel/VM/RangeAllocator.cpp | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Kernel/VM/RangeAllocator.cpp b/Kernel/VM/RangeAllocator.cpp index f4fb7ab3c1..8330a798be 100644 --- a/Kernel/VM/RangeAllocator.cpp +++ b/Kernel/VM/RangeAllocator.cpp @@ -59,12 +59,14 @@ void RangeAllocator::carve_at_index(int index, const Range& range) Range RangeAllocator::allocate_anywhere(size_t size) { + // NOTE: We pad VM allocations with a guard page on each side. + size_t padded_size = size + PAGE_SIZE * 2; for (int i = 0; i < m_available_ranges.size(); ++i) { auto& available_range = m_available_ranges[i]; - if (available_range.size() < size) + if (available_range.size() < padded_size) continue; - Range allocated_range(available_range.base(), size); - if (available_range.size() == size) { + Range allocated_range(available_range.base().offset(PAGE_SIZE), size); + if (available_range.size() == padded_size) { #ifdef VRA_DEBUG dbgprintf("VRA: Allocated perfect-fit anywhere(%u): %x\n", size, allocated_range.base().get()); #endif |