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mem: Guard against Buddy_Allocator overwriting metadata

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Feoramund
2025-06-20 06:44:44 -04:00
parent bfa0e1110a
commit 4d4356e806
1 changed files with 1 additions and 0 deletions
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core/mem/allocators.odin
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@@ -2328,6 +2328,7 @@ buddy_allocator_alloc_bytes_non_zeroed :: proc(b: ^Buddy_Allocator, size: uint)
} }
found.is_free = false found.is_free = false
data := ([^]byte)(found)[b.alignment:][:size] data := ([^]byte)(found)[b.alignment:][:size]
assert(cast(uintptr)raw_data(data)+cast(uintptr)size < cast(uintptr)buddy_block_next(found), "Buddy_Allocator has made an allocation which overlaps a block header.")
// ensure_poisoned(data) // ensure_poisoned(data)
// sanitizer.address_unpoison(data) // sanitizer.address_unpoison(data)
return data, nil return data, nil