linux-kernel - [PATCH] ixgbe: correctly handling failed allocation

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Message-Id: <1451426117-30986-1-git-send-email-wuninsu@gmail.com>
Date:	Tue, 29 Dec 2015 16:55:17 -0500
From:	Insu Yun <wuninsu@...il.com>
To:	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	shannon.nelson@...el.com, carolyn.wyborny@...el.com,
	donald.c.skidmore@...el.com, bruce.w.allan@...el.com,
	john.ronciak@...el.com, mitch.a.williams@...el.com,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	taesoo@...ech.edu, yeongjin.jang@...ech.edu, insu@...ech.edu,
	changwoo@...ech.edu, Insu Yun <wuninsu@...il.com>
Subject: [PATCH] ixgbe: correctly handling failed allocation

Since kzalloc can be failed in memory pressure,
NULL derefence could be happened.

Signed-off-by: Insu Yun <wuninsu@...il.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index aed8d02..aa5eda0 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -5331,6 +5331,8 @@ static int ixgbe_sw_init(struct ixgbe_adapter *adapter)
 	adapter->mac_table = kzalloc(sizeof(struct ixgbe_mac_addr) *
 				     hw->mac.num_rar_entries,
 				     GFP_ATOMIC);
+	if (!adapter->mac_table)
+		return -ENOMEM;
 
 	/* Set MAC specific capability flags and exceptions */
 	switch (hw->mac.type) {
-- 
1.9.1

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