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Message-Id: <1436944189-26618-11-git-send-email-mkl@pengutronix.de> Date: Wed, 15 Jul 2015 09:09:47 +0200 From: Marc Kleine-Budde <mkl@...gutronix.de> To: netdev@...r.kernel.org Cc: davem@...emloft.net, linux-can@...r.kernel.org, kernel@...gutronix.de, Marc Kleine-Budde <mkl@...gutronix.de>, Gerhard Uttenthaler <uttenthaler@...-wuensche.com> Subject: [PATCH 10/12] can: ems_usb: don't touch skb after netif_rx() There is no guarantee that the skb is in the same state after calling net_receive_skb() or netif_rx(). It might be freed or reused. Not really harmful as its a read access, except you turn on the proper debugging options which catch a use after free. Cc: Gerhard Uttenthaler <uttenthaler@...-wuensche.com> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de> --- drivers/net/can/usb/ems_usb.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c index 866bac0ae7e9..2d390384ef3b 100644 --- a/drivers/net/can/usb/ems_usb.c +++ b/drivers/net/can/usb/ems_usb.c @@ -324,10 +324,9 @@ static void ems_usb_rx_can_msg(struct ems_usb *dev, struct ems_cpc_msg *msg) cf->data[i] = msg->msg.can_msg.msg[i]; } - netif_rx(skb); - stats->rx_packets++; stats->rx_bytes += cf->can_dlc; + netif_rx(skb); } static void ems_usb_rx_err(struct ems_usb *dev, struct ems_cpc_msg *msg) @@ -400,10 +399,9 @@ static void ems_usb_rx_err(struct ems_usb *dev, struct ems_cpc_msg *msg) stats->rx_errors++; } - netif_rx(skb); - stats->rx_packets++; stats->rx_bytes += cf->can_dlc; + netif_rx(skb); } /* -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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