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Kernel: Make allocate_randomized() work for 64-bit addresses

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The odds of finding a suitable address in 1000 attempts were not in our
favor given the size of the 64-bit address space.
This commit is contained in:
Gunnar Beutner 2021-07-18 02:48:35 +02:00 • committed by Andreas Kling
parent f0c4941beb
commit 357ddd393e
1 changed files with 1 additions and 1 deletions
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2
Kernel/VM/RangeAllocator.cpp
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@ -67,7 +67,7 @@ Optional<Range> RangeAllocator::allocate_randomized(size_t size, size_t alignmen
// FIXME: I'm sure there's a smarter way to do this.
static constexpr size_t maximum_randomization_attempts = 1000;
for (size_t i = 0; i < maximum_randomization_attempts; ++i) {
VirtualAddress random_address { round_up_to_power_of_two(get_fast_random<FlatPtr>(), alignment) };
VirtualAddress random_address { round_up_to_power_of_two(get_fast_random<FlatPtr>() % m_total_range.end().get(), alignment) };
if (!m_total_range.contains(random_address, size))
continue;