[dpdk-stable] patch 'net/i40e: fix memory overflow in 32-bit SSE Rx' has been queued to LTS release 16.11.2

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to LTS release 16.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable
yet. It will be pushed if I get no objections before 05/13/17.
So please shout if anyone has objections.

Thanks.

	--yliu

---
>From 230b64b61eb82f69cec2e6d6e8c08ed78bef5b67 Mon Sep 17 00:00:00 2001
From: Qi Zhang <qi.z.zhang at intel.com>
Date: Sun, 30 Apr 2017 01:26:49 -0400
Subject: [PATCH] net/i40e: fix memory overflow in 32-bit SSE Rx

[ upstream commit f4afa1a0487fc73055a6d5571a20fdc0ed99866d ]

Return mbuf points of _recv_raw_pkts_vec are modified out of bound.

Fixes: 8e109464c022 ("i40e: allow vector Rx and Tx usage")

Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
---
 drivers/net/i40e/i40e_rxtx_vec_sse.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/i40e/i40e_rxtx_vec_sse.c b/drivers/net/i40e/i40e_rxtx_vec_sse.c
index b95cc8e..9644dd6 100644
--- a/drivers/net/i40e/i40e_rxtx_vec_sse.c
+++ b/drivers/net/i40e/i40e_rxtx_vec_sse.c
@@ -320,20 +320,26 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
 		__m128i descs[RTE_I40E_DESCS_PER_LOOP];
 		__m128i pkt_mb1, pkt_mb2, pkt_mb3, pkt_mb4;
 		__m128i zero, staterr, sterr_tmp1, sterr_tmp2;
-		__m128i mbp1, mbp2; /* two mbuf pointer in one XMM reg. */
+		/* 2 64 bit or 4 32 bit mbuf pointers in one XMM reg. */
+		__m128i mbp1;
+#if defined(RTE_ARCH_X86_64)
+		__m128i mbp2;
+#endif
 
-		/* B.1 load 1 mbuf point */
+		/* B.1 load 2 (64 bit) or 4 (32 bit) mbuf points */
 		mbp1 = _mm_loadu_si128((__m128i *)&sw_ring[pos]);
 		/* Read desc statuses backwards to avoid race condition */
 		/* A.1 load 4 pkts desc */
 		descs[3] = _mm_loadu_si128((__m128i *)(rxdp + 3));
 		rte_compiler_barrier();
 
-		/* B.2 copy 2 mbuf point into rx_pkts  */
+		/* B.2 copy 2 64 bit or 4 32 bit mbuf point into rx_pkts */
 		_mm_storeu_si128((__m128i *)&rx_pkts[pos], mbp1);
 
-		/* B.1 load 1 mbuf point */
+#if defined(RTE_ARCH_X86_64)
+		/* B.1 load 2 64 bit mbuf points */
 		mbp2 = _mm_loadu_si128((__m128i *)&sw_ring[pos+2]);
+#endif
 
 		descs[2] = _mm_loadu_si128((__m128i *)(rxdp + 2));
 		rte_compiler_barrier();
@@ -342,8 +348,10 @@ _recv_raw_pkts_vec(struct i40e_rx_queue *rxq, struct rte_mbuf **rx_pkts,
 		rte_compiler_barrier();
 		descs[0] = _mm_loadu_si128((__m128i *)(rxdp));
 
+#if defined(RTE_ARCH_X86_64)
 		/* B.2 copy 2 mbuf point into rx_pkts  */
 		_mm_storeu_si128((__m128i *)&rx_pkts[pos+2], mbp2);
+#endif
 
 		if (split_packet) {
 			rte_mbuf_prefetch_part2(rx_pkts[pos]);
-- 
1.9.0