target/linux/bcm4908/patches-5.10/073-v5.12-0010-net-broadcom-bcm4908_enet-fix-RX-path-possible-mem-l.patch

   1 From 4dc7f09b8becfa35a55430a49d95acf19f996e6b Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
   3 Date: Wed, 24 Feb 2021 16:18:41 +0100
   4 Subject: [PATCH] net: broadcom: bcm4908_enet: fix RX path possible mem leak
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 After filling RX ring slot with new skb it's required to free old skb.
  10 Immediately on error or later in the net subsystem.
  11
  12 Fixes: 4feffeadbcb2 ("net: broadcom: bcm4908enet: add BCM4908 controller driver")
  13 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  14 Acked-by: Florian Fainelli <f.fainelli@gmail.com>
  15 Link: https://lore.kernel.org/r/20210224151842.2419-1-zajec5@gmail.com
  16 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  17 ---
  18  drivers/net/ethernet/broadcom/bcm4908_enet.c | 1 +
  19  1 file changed, 1 insertion(+)
  20
  21 --- a/drivers/net/ethernet/broadcom/bcm4908_enet.c
  22 +++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c
  23 @@ -570,6 +570,7 @@ static int bcm4908_enet_poll(struct napi
  24
  25                 if (len < ETH_ZLEN ||
  26                     (ctl & (DMA_CTL_STATUS_SOP | DMA_CTL_STATUS_EOP)) != (DMA_CTL_STATUS_SOP | DMA_CTL_STATUS_EOP)) {
  27 +                       kfree_skb(slot.skb);
  28                         enet->netdev->stats.rx_dropped++;
  29                         break;
  30                 }