memory: validate sparse uploads against the guest address-space owner

src/kernel/memory.cpp

@@ -964,16 +964,6 @@ static bool IsInPrtAperture(uint64_t address, uint64_t size = 1) {
 }
 
 bool TryReadSparseBacking(uint64_t vaddr, void* data, uint64_t size) {
-	std::vector<VirtualRanges::Range> ranges;
-	if (!g_virtual_ranges->QuerySpan(vaddr, size, &ranges)) {
-		return false;
-	}
-	if (std::any_of(ranges.begin(), ranges.end(), [](const auto& range) {
-		    return !IsReservedRangeType(range.type) &&
-		           !g_guest_address_space->BackingContains(range.start, range.size);
-	    })) {
-		return false;
-	}
 	return g_guest_address_space->TryReadSparseBacking(vaddr, data, size);
 }