From: hayeswang <hayeswang@realtek.com>
Date: Tue, 14 Mar 2017 06:15:20 +0000 (+0800)
Subject: r8152: fix the list rx_done may be used without initialization
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=a88b064826f071dd9e722a9687c8aafaaa3b40ee;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

r8152: fix the list rx_done may be used without initialization


[ Upstream commit 98d068ab52b4b11d403995ed14154660797e7136 ]

The list rx_done would be initialized when the linking on occurs.
Therefore, if a napi is scheduled without any linking on before,
the following kernel panic would happen.

	BUG: unable to handle kernel NULL pointer dereference at 000000000000008
	IP: [<ffffffffc085efde>] r8152_poll+0xe1e/0x1210 [r8152]
	PGD 0
	Oops: 0002 [#1] SMP

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 1c27e6fb99f9..a1dc43b9bd38 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1277,6 +1277,7 @@ static int alloc_all_mem(struct r8152 *tp)
 	spin_lock_init(&tp->rx_lock);
 	spin_lock_init(&tp->tx_lock);
 	INIT_LIST_HEAD(&tp->tx_free);
+	INIT_LIST_HEAD(&tp->rx_done);
 	skb_queue_head_init(&tp->tx_queue);
 	skb_queue_head_init(&tp->rx_queue);