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LibC: Don't munmap nullptr with 0 size in malloc

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Bananymous
2026-07-20 04:07:23 +03:00
parent efb25e5666
commit 583c2437b4
1 changed files with 6 additions and 4 deletions
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userspace/libraries/LibC/malloc.cpp
+3 -1
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@@ -264,10 +264,12 @@ void* malloc(size_t total_size)
if (new_allocators == MAP_FAILED) if (new_allocators == MAP_FAILED)
goto malloc_return; goto malloc_return;
if (s_allocators != nullptr)
{
static_assert(BAN::is_trivially_copyable_v<BitmapAllocator>); static_assert(BAN::is_trivially_copyable_v<BitmapAllocator>);
memcpy(new_allocators, s_allocators, s_allocator_count * sizeof(BitmapAllocator)); memcpy(new_allocators, s_allocators, s_allocator_count * sizeof(BitmapAllocator));
munmap(s_allocators, s_allocator_capacity * sizeof(BitmapAllocator)); munmap(s_allocators, s_allocator_capacity * sizeof(BitmapAllocator));
}
s_allocators = static_cast<BitmapAllocator*>(new_allocators); s_allocators = static_cast<BitmapAllocator*>(new_allocators);
s_allocator_capacity = new_allocator_pages * page_size / sizeof(BitmapAllocator); s_allocator_capacity = new_allocator_pages * page_size / sizeof(BitmapAllocator);