diff mbox series

[net,1/3] net: qualcomm: rmnet: Skip processing loopback packets

Message ID 1538527923-29562-2-git-send-email-subashab@codeaurora.org
State Accepted, archived
Delegated to: David Miller
Headers show
Series net: qualcomm: rmnet: Updates 2018-10-02 | expand

Commit Message

Subash Abhinov Kasiviswanathan Oct. 3, 2018, 12:52 a.m. UTC 
From: Sean Tranchetti <stranche@codeaurora.org>

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>
---
 drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
index 7fd86d4..6908b26 100644
--- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
+++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
@@ -189,6 +189,9 @@  rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb)
 	if (!skb)
 		goto done;
 
+	if (skb->pkt_type == PACKET_LOOPBACK)
+		return RX_HANDLER_PASS;
+
 	dev = skb->dev;
 	port = rmnet_get_port(dev);