From 50a10538e4c24b35de1ebd99b31e7abf5843b515 Mon Sep 17 00:00:00 2001
From: hanzhijian <hanzhijian@zepp.com>
Date: Thu, 20 Aug 2026 22:45:41 +0800
Subject: [PATCH] [drivers][virtio] Fix RX buffer leak on pbuf allocation
 failure

---
 components/drivers/virtio/virtio-net.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/components/drivers/virtio/virtio-net.c b/components/drivers/virtio/virtio-net.c
index e2e1b559a661..c078425cc365 100644
--- a/components/drivers/virtio/virtio-net.c
+++ b/components/drivers/virtio/virtio-net.c
@@ -124,6 +124,19 @@ static struct pbuf *virtio_net_rx(rt_device_t dev)
 
         if (!p)
         {
+            level = rt_spin_lock_irqsave(&vnet->rx_lock);
+
+            if (!rt_virtqueue_poll(vq, packet - vnet->rx_packet))
+            {
+                rt_list_remove(&vq->user_list);
+            }
+
+            rt_virtqueue_add_inbuf(vq, packet, sizeof(*packet));
+
+            rt_virtqueue_kick(vq);
+
+            rt_spin_unlock_irqrestore(&vnet->rx_lock, level);
+
             return RT_NULL;
         }