From 19fc62f445deafa2dfaec1cfde534cc920e349ab Mon Sep 17 00:00:00 2001 From: Andreas Kling Date: Sat, 27 Feb 2021 16:56:50 +0100 Subject: [PATCH] Kernel: Use get_fast_random() for MAP_RANDOMIZED addresses Let's not block sys$mmap() on kernel randomness. --- Kernel/VM/RangeAllocator.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Kernel/VM/RangeAllocator.cpp b/Kernel/VM/RangeAllocator.cpp index 6ac0e045f9..26561bfe6b 100644 --- a/Kernel/VM/RangeAllocator.cpp +++ b/Kernel/VM/RangeAllocator.cpp @@ -90,7 +90,7 @@ Optional 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(), alignment) }; + VirtualAddress random_address { round_up_to_power_of_two(get_fast_random(), alignment) }; if (!m_total_range.contains(random_address, size)) continue;