target/linux/layerscape/patches-5.4/701-net-0096-sdk_dpaa-guard-against-an-out-of-bounds-queue-index.patch

   1 From 56203e34ec05e39a088036b5d9db7fde7a7af742 Mon Sep 17 00:00:00 2001
   2 From: Camelia Groza <camelia.groza@nxp.com>
   3 Date: Tue, 30 Oct 2018 18:18:30 +0200
   4 Subject: [PATCH] sdk_dpaa: guard against an out of bounds queue index
   5
   6 Make sure the queue mapping recorded in the skb is not larger than our
   7 egress queue count.
   8
   9 Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
  10 ---
  11  drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c | 5 ++++-
  12  1 file changed, 4 insertions(+), 1 deletion(-)
  13
  14 --- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
  15 +++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_sg.c
  16 @@ -1035,7 +1035,7 @@ EXPORT_SYMBOL(skb_to_sg_fd);
  17  int __hot dpa_tx(struct sk_buff *skb, struct net_device *net_dev)
  18  {
  19         struct dpa_priv_s       *priv;
  20 -       const int queue_mapping = dpa_get_queue_mapping(skb);
  21 +       int queue_mapping = dpa_get_queue_mapping(skb);
  22         struct qman_fq *egress_fq, *conf_fq;
  23
  24  #ifdef CONFIG_FSL_DPAA_HOOKS
  25 @@ -1053,6 +1053,9 @@ int __hot dpa_tx(struct sk_buff *skb, st
  26                 return ceetm_tx(skb, net_dev);
  27  #endif
  28
  29 +       if (unlikely(queue_mapping >= DPAA_ETH_TX_QUEUES))
  30 +               queue_mapping = queue_mapping % DPAA_ETH_TX_QUEUES;
  31 +
  32         egress_fq = priv->egress_fqs[queue_mapping];
  33         conf_fq = priv->conf_fqs[queue_mapping];
  34