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Message-Id: <20181016041403.135678-54-sashal@kernel.org>
Date: Tue, 16 Oct 2018 00:13:56 -0400
From: Sasha Levin <sashal@...nel.org>
To: stable@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Sean Tranchetti <stranche@...eaurora.org>,
Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>,
"David S . Miller" <davem@...emloft.net>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.14 54/61] net: qualcomm: rmnet: Skip processing loopback packets
From: Sean Tranchetti <stranche@...eaurora.org>
[ 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@...eaurora.org>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@...eaurora.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.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
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