From: hayeswang hayeswang@realtek.com
[ 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 --- drivers/net/usb/r8152.c | 1 + 1 file changed, 1 insertion(+)
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);