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From: gustavo@embeddedor.com (Gustavo A. R. Silva)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] net: thunderx: nicvf_main: Fix potential NULL pointer dereference
Date: Tue, 3 Apr 2018 16:29:25 -0500	[thread overview]
Message-ID: <20180403212925.GA31093@embeddedor.com> (raw)

Add null check on kmalloc() return value in order to prevent
a null pointer dereference.

Addresses-Coverity-ID: 1467429 ("Dereference null return value")
Fixes: 37c3347eb247 ("net: thunderx: add ndo_set_rx_mode callback implementation for VF")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 drivers/net/ethernet/cavium/thunder/nicvf_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 1e9a31f..468321a 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -1999,6 +1999,8 @@ static void nicvf_set_rx_mode(struct net_device *netdev)
 				struct xcast_addr *xaddr;
 
 				mc_list = kmalloc(sizeof(*mc_list), GFP_ATOMIC);
+				if (unlikely(!mc_list))
+					return;
 				INIT_LIST_HEAD(&mc_list->list);
 				netdev_hw_addr_list_for_each(ha, &netdev->mc) {
 					xaddr = kmalloc(sizeof(*xaddr),
-- 
2.7.4

WARNING: multiple messages have this Message-ID (diff)
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
To: Sunil Goutham <sgoutham@cavium.com>, Robert Richter <rric@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	"Gustavo A. R. Silva" <gustavo@embeddedor.com>
Subject: [PATCH] net: thunderx: nicvf_main: Fix potential NULL pointer dereference
Date: Tue, 3 Apr 2018 16:29:25 -0500	[thread overview]
Message-ID: <20180403212925.GA31093@embeddedor.com> (raw)

Add null check on kmalloc() return value in order to prevent
a null pointer dereference.

Addresses-Coverity-ID: 1467429 ("Dereference null return value")
Fixes: 37c3347eb247 ("net: thunderx: add ndo_set_rx_mode callback implementation for VF")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
 drivers/net/ethernet/cavium/thunder/nicvf_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index 1e9a31f..468321a 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -1999,6 +1999,8 @@ static void nicvf_set_rx_mode(struct net_device *netdev)
 				struct xcast_addr *xaddr;
 
 				mc_list = kmalloc(sizeof(*mc_list), GFP_ATOMIC);
+				if (unlikely(!mc_list))
+					return;
 				INIT_LIST_HEAD(&mc_list->list);
 				netdev_hw_addr_list_for_each(ha, &netdev->mc) {
 					xaddr = kmalloc(sizeof(*xaddr),
-- 
2.7.4

             reply	other threads:[~2018-04-03 21:29 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-03 21:29 Gustavo A. R. Silva [this message]
2018-04-03 21:29 ` [PATCH] net: thunderx: nicvf_main: Fix potential NULL pointer dereference Gustavo A. R. Silva
2018-04-03 21:47 ` Eric Dumazet
2018-04-03 21:47   ` Eric Dumazet
2018-04-03 21:52   ` Gustavo A. R. Silva
2018-04-03 21:52     ` Gustavo A. R. Silva

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