patch 'net/hns3: fix overwrite mbuf in vector path' has been queued to stable release 24.11.4

[Kevin Traynor]

Hi,

FYI, your patch has been queued to stable release 24.11.4

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 11/05/25. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/kevintraynor/dpdk-stable

This queued commit can be viewed at:
https://github.com/kevintraynor/dpdk-stable/commit/fe744304a87b4a3f2de377b17f292dee20016f06

Thanks.

Kevin

---
>From fe744304a87b4a3f2de377b17f292dee20016f06 Mon Sep 17 00:00:00 2001
From: Chengwen Feng <fengchengwen at huawei.com>
Date: Fri, 22 Aug 2025 14:04:29 +0800
Subject: [PATCH] net/hns3: fix overwrite mbuf in vector path

[ upstream commit 06b296a2264fcd1fe2d167f2d90a58607f5e81f5 ]

The vector path processes multiple descriptors at a time and modifies
the corresponding mbufs accordingly. When the mbufs cannot be applied
for, the previous patch [1] only clears the first descriptor's valid
bit, which is not enough. In this patch, the mbufs points to the
fake_mbuf to prevent overwrite.

[1] commit 01843ab2f2fc ("net/hns3: fix crash for NEON and SVE")

Fixes: a3d4f4d291d7 ("net/hns3: support NEON Rx")
Fixes: 01843ab2f2fc ("net/hns3: fix crash for NEON and SVE")

Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
Signed-off-by: Dengdui Huang <huangdengdui at huawei.com>
---
 drivers/net/hns3/hns3_rxtx_vec.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/hns3/hns3_rxtx_vec.h b/drivers/net/hns3/hns3_rxtx_vec.h
index 9018e79c2f..6afa2fb814 100644
--- a/drivers/net/hns3/hns3_rxtx_vec.h
+++ b/drivers/net/hns3/hns3_rxtx_vec.h
@@ -110,6 +110,10 @@ hns3_rxq_rearm_mbuf(struct hns3_rx_queue *rxq)
 		 * Clear VLD bit for the first descriptor rearmed in case
 		 * of going to receive packets later.
+		 * And also point mbufs to fake_mbuf to prevent modification
+		 * of the mbuf field during vector packet receiving.
 		 */
 		rxdp[0].rx.bd_base_info = 0;
+		for (i = 0; i < HNS3_VECTOR_RX_OFFSET_TABLE_LEN; i++)
+			rxep[i].mbuf = &rxq->fake_mbuf;
 		rte_eth_devices[rxq->port_id].data->rx_mbuf_alloc_failed++;
 		return;
-- 
2.51.0

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2025-10-31 13:53:55.108198759 +0000
+++ 0094-net-hns3-fix-overwrite-mbuf-in-vector-path.patch	2025-10-31 13:53:52.270300371 +0000
@@ -1 +1 @@
-From 06b296a2264fcd1fe2d167f2d90a58607f5e81f5 Mon Sep 17 00:00:00 2001
+From fe744304a87b4a3f2de377b17f292dee20016f06 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 06b296a2264fcd1fe2d167f2d90a58607f5e81f5 ]
+
@@ -16 +17,0 @@
-Cc: stable at dpdk.org