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Kernel: Use get_fast_random() for MAP_RANDOMIZED addresses

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Let's not block sys$mmap() on kernel randomness.
This commit is contained in:
Andreas Kling 2021-02-27 16:56:50 +01:00
parent d8fa479d05
commit 19fc62f445
Notes: sideshowbarker 2024-07-18 21:52:35 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/19fc62f445d
1 changed files with 1 additions and 1 deletions
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Kernel/VM/RangeAllocator.cpp
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@ -90,7 +90,7 @@ 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_good_random<FlatPtr>(), alignment) };
VirtualAddress random_address { round_up_to_power_of_two(get_fast_random<FlatPtr>(), alignment) };
if (!m_total_range.contains(random_address, size))
continue;