[dpdk-stable] patch 'net/ena: check pointer before memset' has been queued to stable release 18.05.1

[Christian Ehrhardt]

Hi,

FYI, your patch has been queued to stable release 18.05.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 08/01/18. So please
shout if anyone has objections.

Thanks.

Christian Ehrhardt <christian.ehrhardt at canonical.com>

---
>From 7f9283e2e0406aaa7e38ed664564d8a935a5c577 Mon Sep 17 00:00:00 2001
From: Rafal Kozik <rk at semihalf.com>
Date: Thu, 7 Jun 2018 11:43:18 +0200
Subject: [PATCH] net/ena: check pointer before memset

[ upstream commit 46916aa17d4b2007df8c0454f99ba0ca8b8cb93b ]

Need to check if memory allocation succeed before using it.
Using memset on NULL pointer cause segfault.

Fixes: 9ba7981ec992 ("ena: add communication layer for DPDK")

Signed-off-by: Rafal Kozik <rk at semihalf.com>
Acked-by: Michal Krawczyk <mk at semihalf.com>
---
 drivers/net/ena/base/ena_plat_dpdk.h | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ena/base/ena_plat_dpdk.h b/drivers/net/ena/base/ena_plat_dpdk.h
index 93345199a..0ee440c21 100644
--- a/drivers/net/ena/base/ena_plat_dpdk.h
+++ b/drivers/net/ena/base/ena_plat_dpdk.h
@@ -190,10 +190,15 @@ typedef uint64_t dma_addr_t;
 				"ena_alloc_%d", ena_alloc_cnt++);	\
 		mz = rte_memzone_reserve(z_name, size, SOCKET_ID_ANY,	\
 				RTE_MEMZONE_IOVA_CONTIG);		\
-		memset(mz->addr, 0, size);				\
-		virt = mz->addr;					\
-		phys = mz->iova;					\
 		handle = mz;						\
+		if (mz == NULL) {					\
+			virt = NULL;					\
+			phys = 0;					\
+		} else {						\
+			memset(mz->addr, 0, size);			\
+			virt = mz->addr;				\
+			phys = mz->iova;				\
+		}							\
 	} while (0)
 #define ENA_MEM_FREE_COHERENT(dmadev, size, virt, phys, handle) 	\
 		({ ENA_TOUCH(size); ENA_TOUCH(phys);			\
@@ -209,9 +214,14 @@ typedef uint64_t dma_addr_t;
 				"ena_alloc_%d", ena_alloc_cnt++);	\
 		mz = rte_memzone_reserve(z_name, size, node,		\
 				RTE_MEMZONE_IOVA_CONTIG);		\
-		memset(mz->addr, 0, size);				\
-		virt = mz->addr;					\
-		phys = mz->iova;					\
+		if (mz == NULL) {					\
+			virt = NULL;					\
+			phys = 0;					\
+		} else {						\
+			memset(mz->addr, 0, size);			\
+			virt = mz->addr;				\
+			phys = mz->iova;				\
+		}							\
 	} while (0)
 
 #define ENA_MEM_ALLOC_NODE(dmadev, size, virt, node, dev_node) \
-- 
2.17.1