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Commit 40ce0aa9 authored by hayeswang's avatar hayeswang Committed by Greg Kroah-Hartman
Browse files

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: default avatarHayes Wang <hayeswang@realtek.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <alexander.levin@verizon.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 9577b6c7

drivers/net/usb/r8152.c

+1 −0
Original line number Diff line number Diff line
@@ -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++) {