buffer_cache: avoid overflow in usage tracker (#13166)
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9bc85dda5f
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@ -26,6 +26,9 @@ public:
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void Track(u64 offset, u64 size) noexcept {
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const size_t page = offset >> PAGE_SHIFT;
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const size_t page_end = (offset + size) >> PAGE_SHIFT;
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if (page_end < page || page_end >= pages.size()) {
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return;
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}
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TrackPage(page, offset, size);
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if (page == page_end) {
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return;
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@ -41,6 +44,9 @@ public:
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[[nodiscard]] bool IsUsed(u64 offset, u64 size) const noexcept {
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const size_t page = offset >> PAGE_SHIFT;
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const size_t page_end = (offset + size) >> PAGE_SHIFT;
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if (page_end < page || page_end >= pages.size()) {
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return false;
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}
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if (IsPageUsed(page, offset, size)) {
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return true;
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}
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