From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sean Tranchetti , Subash Abhinov Kasiviswanathan , "David S. Miller" , Sasha Levin Subject: [PATCH 4.14 044/143] net: qualcomm: rmnet: Skip processing loopback packets Date: Fri, 2 Nov 2018 19:33:49 +0100 Message-Id: <20181102182900.574196542@linuxfoundation.org> In-Reply-To: <20181102182857.064326086@linuxfoundation.org> References: <20181102182857.064326086@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ [ 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 Signed-off-by: Subash Abhinov Kasiviswanathan Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- 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