diff --git a/tap-return-err-when-tap-TUNGETIFF-fail.patch b/tap-return-err-when-tap-TUNGETIFF-fail.patch
new file mode 100644
index 0000000..f74fa19
--- /dev/null
+++ b/tap-return-err-when-tap-TUNGETIFF-fail.patch
@@ -0,0 +1,30 @@
+From 48a38f409a25f26605d65346c8ed9403c4b36c80 Mon Sep 17 00:00:00 2001
+From: Yan Wang <wangyan122@huawei.com>
+Date: Thu, 10 Feb 2022 10:28:59 +0800
+Subject: [PATCH] tap: return err when tap TUNGETIFF fail
+
+When hotplug ovs kernel netcard, even tap TUNGETIFF failed,
+the hotplug would go on and would lead to qemu assert.
+The failure should lead to the free_fail.
+
+Signed-off-by: miaoyubo <miaoyubo@huawei.com>
+Signed-off-by: Yan Wang <wangyan122@huawei.com>
+---
+ net/tap.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/net/tap.c b/net/tap.c
+index f716be3e3f..c5cbeaa7a2 100644
+--- a/net/tap.c
++++ b/net/tap.c
+@@ -900,6 +900,7 @@ int net_init_tap(const Netdev *netdev, const char *name,
+             if (i == 0) {
+                 vnet_hdr = tap_probe_vnet_hdr(fd, errp);
+                 if (vnet_hdr < 0) {
++                    ret = -1;
+                     goto free_fail;
+                 }
+             } else if (vnet_hdr != tap_probe_vnet_hdr(fd, NULL)) {
+-- 
+2.27.0
+