4.9-stable review patch. If anyone has any objections, please let me know.
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From: Andri Yngvason andri.yngvason@marel.com
commit 9ffd7503944ec7c0ef41c3245d1306c221aef2be upstream.
This fixes use after free introduced by the last cc770 patch.
Signed-off-by: Andri Yngvason andri.yngvason@marel.com Fixes: 746201235b3f ("can: cc770: Fix queue stall & dropped RTR reply") Cc: linux-stable stable@vger.kernel.org Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/can/cc770/cc770.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/net/can/cc770/cc770.c +++ b/drivers/net/can/cc770/cc770.c @@ -706,13 +706,12 @@ static void cc770_tx_interrupt(struct ne return; }
- can_put_echo_skb(priv->tx_skb, dev, 0); - can_get_echo_skb(dev, 0); - cf = (struct can_frame *)priv->tx_skb->data; stats->tx_bytes += cf->can_dlc; stats->tx_packets++;
+ can_put_echo_skb(priv->tx_skb, dev, 0); + can_get_echo_skb(dev, 0); priv->tx_skb = NULL;
netif_wake_queue(dev);