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 c6554c7a8147045450ec8385797038f1ceba955f..31cb1cda7166a198839eadb1e2bdd86cc1ab32ce 100644 (file)
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1252,6 +1252,7 @@ static int alloc_all_mem(struct r8152 *tp)
        spin_lock_init(&tp->tx_lock);
        INIT_LIST_HEAD(&tp->rx_done);
        INIT_LIST_HEAD(&tp->tx_free);
+       INIT_LIST_HEAD(&tp->rx_done);
        skb_queue_head_init(&tp->tx_queue);
 
        for (i = 0; i < RTL8152_MAX_RX; i++) {