From: Rafal Kozik <rk@semihalf.com>
Date: Thu, 7 Jun 2018 09:43:18 +0000 (+0200)
Subject: net/ena: check pointer before memset
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=46916aa17d4b2007df8c0454f99ba0ca8b8cb93b;p=dpdk.git

net/ena: check pointer before memset

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")
Cc: stable@dpdk.org

Signed-off-by: Rafal Kozik <rk@semihalf.com>
Acked-by: Michal Krawczyk <mk@semihalf.com>
---

diff --git a/drivers/net/ena/base/ena_plat_dpdk.h b/drivers/net/ena/base/ena_plat_dpdk.h
index e2af4ee2ca..d30153e92b 100644
--- a/drivers/net/ena/base/ena_plat_dpdk.h
+++ b/drivers/net/ena/base/ena_plat_dpdk.h
@@ -210,10 +210,15 @@ extern uint32_t ena_alloc_cnt;
 				"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);			\
@@ -230,9 +235,14 @@ extern uint32_t ena_alloc_cnt;
 				"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;				\
+		}							\
 		(void)mem_handle;					\
 	} while (0)