Message ID | 20230120162650.984577-4-Liam.Howlett@oracle.com (mailing list archive) |
---|---|
State | New |
Headers | show
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Howlett" <Liam.Howlett@oracle.com> To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>, maple-tree@lists.infradead.org Cc: "Liam R. Howlett" <Liam.Howlett@Oracle.com>, "Liam R . 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VMA tree type safety and remove __vma_adjust()
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diff --git a/lib/maple_tree.c b/lib/maple_tree.c index cbb8bd9b9d25..1af09c6f7810 100644 --- a/lib/maple_tree.c +++ b/lib/maple_tree.c @@ -4731,6 +4731,11 @@ static inline void *mas_next_entry(struct ma_state *mas, unsigned long limit) unsigned long last; enum maple_type mt; + if (mas->index > limit) { + mas->index = mas->last = limit; + mas_pause(mas); + return NULL; + } last = mas->last; retry: offset = mas->offset; @@ -4837,6 +4842,11 @@ static inline void *mas_prev_entry(struct ma_state *mas, unsigned long min) { void *entry; + if (mas->index < min) { + mas->index = mas->last = min; + mas_pause(mas); + return NULL; + } retry: while (likely(!mas_is_none(mas))) { entry = mas_prev_nentry(mas, min, mas->index);