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Merge pull request #5372 from Feoramund/forbid-ba-invalid-pointer-print

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More `Buddy_Allocator` safeguards
This commit is contained in:
Jeroen van Rijn
2025-06-20 13:09:06 +02:00
committed by GitHub
parent 6563230bd0 4d4356e806
commit 208ace0b03
1 changed files with 2 additions and 1 deletions
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core/mem/allocators.odin
+2 -1
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@@ -2196,7 +2196,7 @@ The buddy allocator data.
*/ */
Buddy_Allocator :: struct { Buddy_Allocator :: struct {
head: ^Buddy_Block, head: ^Buddy_Block,
tail: ^Buddy_Block, tail: ^Buddy_Block `fmt:"-"`,
alignment: uint, alignment: uint,
} }
@@ -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