| From 43b0e3c60fa3f668288a7723f7cf7c301cbfe3d3 Mon Sep 17 00:00:00 2001 |
| From: Sean Tranchetti <stranche@codeaurora.org> |
| Date: Tue, 2 Oct 2018 18:52:01 -0600 |
| Subject: net: qualcomm: rmnet: Skip processing loopback packets |
| |
| [ Upstream commit a07f388e2cde2be74b263f85df6f672fea0305a1 ] |
| |
| RMNET RX handler was processing invalid packets that were |
| originally sent on the real device and were looped back via |
| dev_loopback_xmit(). This was detected using syzkaller. |
| |
| Fixes: ceed73a2cf4a ("drivers: net: ethernet: qualcomm: rmnet: Initial implementation") |
| Signed-off-by: Sean Tranchetti <stranche@codeaurora.org> |
| Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c |
| index 929fb8d96ec0..8d979fef5fc7 100644 |
| --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c |
| +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c |
| @@ -205,6 +205,9 @@ rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb) |
| if (!skb) |
| return RX_HANDLER_CONSUMED; |
| |
| + if (skb->pkt_type == PACKET_LOOPBACK) |
| + return RX_HANDLER_PASS; |
| + |
| dev = skb->dev; |
| port = rmnet_get_port(dev); |
| |
| -- |
| 2.17.1 |
| |
