diff --git a/Kernel/Net/Realtek/RTL8139NetworkAdapter.cpp b/Kernel/Net/Realtek/RTL8139NetworkAdapter.cpp
index b856814511..54e7a2241a 100644
--- a/Kernel/Net/Realtek/RTL8139NetworkAdapter.cpp
+++ b/Kernel/Net/Realtek/RTL8139NetworkAdapter.cpp
@@ -118,18 +118,20 @@ UNMAP_AFTER_INIT ErrorOr<LockRefPtr<RTL8139NetworkAdapter>> RTL8139NetworkAdapte
     if (pci_device_identifier.hardware_id() != rtl8139_id)
         return nullptr;
     u8 irq = pci_device_identifier.interrupt_line().value();
+    auto rx_buffer = TRY(MM.allocate_contiguous_kernel_region(TRY(Memory::page_round_up(RX_BUFFER_SIZE + PACKET_SIZE_MAX)), "RTL8139 RX"sv, Memory::Region::Access::ReadWrite));
+    auto packet_buffer = TRY(MM.allocate_contiguous_kernel_region(TRY(Memory::page_round_up(PACKET_SIZE_MAX)), "RTL8139 Packet buffer"sv, Memory::Region::Access::ReadWrite));
     auto interface_name = TRY(NetworkingManagement::generate_interface_name_from_pci_address(pci_device_identifier));
     auto registers_io_window = TRY(IOWindow::create_for_pci_device_bar(pci_device_identifier, PCI::HeaderType0BaseRegister::BAR0));
-    return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) RTL8139NetworkAdapter(pci_device_identifier.address(), irq, move(registers_io_window), move(interface_name))));
+    return TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) RTL8139NetworkAdapter(pci_device_identifier.address(), irq, move(rx_buffer), move(packet_buffer), move(registers_io_window), move(interface_name))));
 }
 
-UNMAP_AFTER_INIT RTL8139NetworkAdapter::RTL8139NetworkAdapter(PCI::Address address, u8 irq, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString> interface_name)
+UNMAP_AFTER_INIT RTL8139NetworkAdapter::RTL8139NetworkAdapter(PCI::Address address, u8 irq, NonnullOwnPtr<Memory::Region> rx_buffer, NonnullOwnPtr<Memory::Region> packet_buffer, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString> interface_name)
     : NetworkAdapter(move(interface_name))
     , PCI::Device(address)
     , IRQHandler(irq)
     , m_registers_io_window(move(registers_io_window))
-    , m_rx_buffer(MM.allocate_contiguous_kernel_region(Memory::page_round_up(RX_BUFFER_SIZE + PACKET_SIZE_MAX).release_value_but_fixme_should_propagate_errors(), "RTL8139 RX"sv, Memory::Region::Access::ReadWrite).release_value())
-    , m_packet_buffer(MM.allocate_contiguous_kernel_region(Memory::page_round_up(PACKET_SIZE_MAX).release_value_but_fixme_should_propagate_errors(), "RTL8139 Packet buffer"sv, Memory::Region::Access::ReadWrite).release_value())
+    , m_rx_buffer(move(rx_buffer))
+    , m_packet_buffer(move(packet_buffer))
 {
     m_tx_buffers.ensure_capacity(RTL8139_TX_BUFFER_COUNT);
 
diff --git a/Kernel/Net/Realtek/RTL8139NetworkAdapter.h b/Kernel/Net/Realtek/RTL8139NetworkAdapter.h
index b1062b8f4b..73cbaa2438 100644
--- a/Kernel/Net/Realtek/RTL8139NetworkAdapter.h
+++ b/Kernel/Net/Realtek/RTL8139NetworkAdapter.h
@@ -35,7 +35,7 @@ public:
     virtual StringView device_name() const override { return "RTL8139"sv; }
 
 private:
-    RTL8139NetworkAdapter(PCI::Address, u8 irq, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString>);
+    RTL8139NetworkAdapter(PCI::Address, u8 irq, NonnullOwnPtr<Memory::Region> rx_buffer, NonnullOwnPtr<Memory::Region> packet_buffer, NonnullOwnPtr<IOWindow> registers_io_window, NonnullOwnPtr<KString>);
     virtual bool handle_irq(RegisterState const&) override;
     virtual StringView class_name() const override { return "RTL8139NetworkAdapter"sv; }
 
@@ -53,11 +53,11 @@ private:
 
     NonnullOwnPtr<IOWindow> m_registers_io_window;
     u8 m_interrupt_line { 0 };
-    OwnPtr<Memory::Region> m_rx_buffer;
+    NonnullOwnPtr<Memory::Region> m_rx_buffer;
     u16 m_rx_buffer_offset { 0 };
     Vector<OwnPtr<Memory::Region>> m_tx_buffers;
     u8 m_tx_next_buffer { 0 };
-    OwnPtr<Memory::Region> m_packet_buffer;
+    NonnullOwnPtr<Memory::Region> m_packet_buffer;
     bool m_link_up { false };
     EntropySource m_entropy_source;
 };