diff --git a/0125-add-udp-loop-support-pbuf-line.patch b/0125-add-udp-loop-support-pbuf-line.patch
new file mode 100644
index 0000000000000000000000000000000000000000..b2c9c836b0e3008d50fabe85e098f41bd893b106
--- /dev/null
+++ b/0125-add-udp-loop-support-pbuf-line.patch
@@ -0,0 +1,44 @@
+From f28df378e820af31151c1572becd142d376024e3 Mon Sep 17 00:00:00 2001
+From: compile_success <980965867@qq.com>
+Date: Tue, 23 Apr 2024 02:58:21 +0000
+Subject: [PATCH] add udp loop support pbuf line
+
+---
+ src/core/netif.c | 20 ++++++++++++++------
+ 1 file changed, 14 insertions(+), 6 deletions(-)
+
+diff --git a/src/core/netif.c b/src/core/netif.c
+index 2fc8945..339aaad 100644
+--- a/src/core/netif.c
++++ b/src/core/netif.c
+@@ -1182,13 +1182,21 @@ udp_netif_loop_output(struct netif *netif, struct pbuf *p)
+   LWIP_ASSERT("netif_loop_output: invalid pbuf", p != NULL);
+ 
+   /* Allocate a new pbuf */
+-  r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
+-  if (r == NULL) {
+-    LINK_STATS_INC(link.memerr);
+-    LINK_STATS_INC(link.drop);
+-    MIB2_STATS_NETIF_INC(stats_if, ifoutdiscards);
+-    return ERR_MEM;
++  u16_t p_clen = pbuf_clen(p);
++  struct pbuf *tmp[2048];
++  for(int num = 0; num < p_clen; num++){
++      tmp[num]= pbuf_alloc(PBUF_LINK, p->len, PBUF_RAM);
++      if (tmp[num] == NULL) {
++        LINK_STATS_INC(link.memerr);
++        LINK_STATS_INC(link.drop);
++        MIB2_STATS_NETIF_INC(stats_if, ifoutdiscards);
++        return ERR_MEM;
++      }
++      if(num > 0){
++        pbuf_cat(tmp[0], tmp[num]);
++      }
+   }
++  r = tmp[0];
+ #if LWIP_LOOPBACK_MAX_PBUFS
+   clen = pbuf_clen(r);
+   /* check for overflow or too many pbuf on queue */
+-- 
+2.33.0
+
diff --git a/lwip.spec b/lwip.spec
index 1a19d093e6000cdcea357a96c0b2bdede37f02fc..87f77849cdaae213f5ef425d37e845a9b4627cc3 100644
--- a/lwip.spec
+++ b/lwip.spec
@@ -4,7 +4,7 @@
 Summary: lwip is a small independent implementation of the TCP/IP protocol suite
 Name:    lwip
 Version: 2.2.0
-Release: 17
+Release: 18
 License: BSD
 URL:     http://savannah.nongnu.org/projects/lwip/
 Source0: http://download.savannah.nongnu.org/releases/lwip/%{name}-%{version}.zip
@@ -136,6 +136,7 @@ Patch9120:  0121-add-vlan-filter.patch
 Patch9121:  0122-support-mldv2.patch
 Patch9122:  0123-opts-modify-MEMP_NUM_UDP_PCB.patch 
 Patch9123:  0124-fix-udp-recv-memleak.patch
+Patch9124:  0125-add-udp-loop-support-pbuf-line.patch
 
 BuildRequires: gcc-c++ dos2unix dpdk-devel
 
@@ -165,6 +166,9 @@ cd %{_builddir}/%{name}-%{version}/src
 %{_libdir}/liblwip.a
 
 %changelog
+* Tue Apr 23 2024 zhujunhao <zhujunhao11@huawei.com> - 2.2.0-18
+- add udp loop mod support package exceeds the MTU
+
 * Mon Apr 22 2024 zhujunhao <zhujunhao11@huawei.com> - 2.2.0-17
 - fix udp recv memleak