[dpdk-stable] patch 'net/fm10k: fix memory overflow in 32-bit SSE Rx' has been queued to stable release 17.02.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 17.02.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/28/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 710445038359ea661ee1045b1cb20d5999a9b6f2 Mon Sep 17 00:00:00 2001
From: Qi Zhang <qi.z.zhang at intel.com>
Date: Sun, 30 Apr 2017 01:26:51 -0400
Subject: [PATCH] net/fm10k: fix memory overflow in 32-bit SSE Rx

[ upstream commit 70fca51612722ed686d5565700717384b8f52887 ]

Return mbuf points of _recv_raw_pkts_vec are modified out of bound.

Fixes: a6ce64a97520 ("fm10k: introduce vector driver")

Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
---
 drivers/net/fm10k/fm10k_rxtx_vec.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/net/fm10k/fm10k_rxtx_vec.c b/drivers/net/fm10k/fm10k_rxtx_vec.c
index 27f3e43..3d21652 100644
--- a/drivers/net/fm10k/fm10k_rxtx_vec.c
+++ b/drivers/net/fm10k/fm10k_rxtx_vec.c
@@ -470,9 +470,13 @@ fm10k_recv_raw_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 		__m128i descs0[RTE_FM10K_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. */
+		__m128i mbp1;
+		/* 2 64 bit or 4 32 bit mbuf pointers in one XMM reg. */
+#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 *)&mbufp[pos]);
 
 		/* Read desc statuses backwards to avoid race condition */
@@ -480,11 +484,13 @@ fm10k_recv_raw_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 		descs0[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 poitns */
 		mbp2 = _mm_loadu_si128((__m128i *)&mbufp[pos+2]);
+#endif
 
 		descs0[2] = _mm_loadu_si128((__m128i *)(rxdp + 2));
 		rte_compiler_barrier();
@@ -493,8 +499,10 @@ fm10k_recv_raw_pkts_vec(void *rx_queue, struct rte_mbuf **rx_pkts,
 		rte_compiler_barrier();
 		descs0[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
 
 		/* avoid compiler reorder optimization */
 		rte_compiler_barrier();
-- 
1.9.0