[AUTOSEL,4.18,078/100] net: qualcomm: rmnet: Skip processing loopback packets
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Message ID 20181016041221.135528-78-sashal@kernel.org
State New, archived
Headers show
Series
  • [AUTOSEL,4.18,001/100] xfrm: Validate address prefix lengths in the xfrm selector.
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Commit Message

Sasha Levin Oct. 16, 2018, 4:11 a.m. UTC
From: Sean Tranchetti <stranche@codeaurora.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@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(+)

Patch
diff mbox series

diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
index 7fd86d40a337..6908b26feb9e 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);