target/linux/generic/backport-5.15/728-v6.1-05-net-ethernet-mtk_eth_soc-fix-memory-leak-in-error-pa.patch

   1 From 603ea5e7ffa73c7fac07d8713d97285990695213 Mon Sep 17 00:00:00 2001
   2 From: Yan Cangang <nalanzeyu@gmail.com>
   3 Date: Sun, 20 Nov 2022 13:52:59 +0800
   4 Subject: [PATCH] net: ethernet: mtk_eth_soc: fix memory leak in error path
   5
   6 In mtk_ppe_init(), when dmam_alloc_coherent() or devm_kzalloc() failed,
   7 the rhashtable ppe->l2_flows isn't destroyed. Fix it.
   8
   9 In mtk_probe(), when mtk_ppe_init() or mtk_eth_offload_init() or
  10 register_netdev() failed, have the same problem. Fix it.
  11
  12 Fixes: 33fc42de3327 ("net: ethernet: mtk_eth_soc: support creating mac address based offload entries")
  13 Signed-off-by: Yan Cangang <nalanzeyu@gmail.com>
  14 Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
  15 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  16 ---
  17  drivers/net/ethernet/mediatek/mtk_eth_soc.c |  9 +++++----
  18  drivers/net/ethernet/mediatek/mtk_ppe.c     | 19 +++++++++++++++++--
  19  drivers/net/ethernet/mediatek/mtk_ppe.h     |  1 +
  20  3 files changed, 23 insertions(+), 6 deletions(-)
  21
  22 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  23 +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
  24 @@ -4090,13 +4090,13 @@ static int mtk_probe(struct platform_dev
  25                                                    eth->soc->offload_version, i);
  26                         if (!eth->ppe[i]) {
  27                                 err = -ENOMEM;
  28 -                               goto err_deinit_mdio;
  29 +                               goto err_deinit_ppe;
  30                         }
  31                 }
  32
  33                 err = mtk_eth_offload_init(eth);
  34                 if (err)
  35 -                       goto err_deinit_mdio;
  36 +                       goto err_deinit_ppe;
  37         }
  38
  39         for (i = 0; i < MTK_MAX_DEVS; i++) {
  40 @@ -4106,7 +4106,7 @@ static int mtk_probe(struct platform_dev
  41                 err = register_netdev(eth->netdev[i]);
  42                 if (err) {
  43                         dev_err(eth->dev, "error bringing up device\n");
  44 -                       goto err_deinit_mdio;
  45 +                       goto err_deinit_ppe;
  46                 } else
  47                         netif_info(eth, probe, eth->netdev[i],
  48                                    "mediatek frame engine at 0x%08lx, irq %d\n",
  49 @@ -4126,7 +4126,8 @@ static int mtk_probe(struct platform_dev
  50
  51         return 0;
  52
  53 -err_deinit_mdio:
  54 +err_deinit_ppe:
  55 +       mtk_ppe_deinit(eth);
  56         mtk_mdio_cleanup(eth);
  57  err_free_dev:
  58         mtk_free_dev(eth);
  59 --- a/drivers/net/ethernet/mediatek/mtk_ppe.c
  60 +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
  61 @@ -743,7 +743,7 @@ struct mtk_ppe *mtk_ppe_init(struct mtk_
  62                                   MTK_PPE_ENTRIES * soc->foe_entry_size,
  63                                   &ppe->foe_phys, GFP_KERNEL);
  64         if (!foe)
  65 -               return NULL;
  66 +               goto err_free_l2_flows;
  67
  68         ppe->foe_table = foe;
  69
  70 @@ -751,11 +751,26 @@ struct mtk_ppe *mtk_ppe_init(struct mtk_
  71                         sizeof(*ppe->foe_flow);
  72         ppe->foe_flow = devm_kzalloc(dev, foe_flow_size, GFP_KERNEL);
  73         if (!ppe->foe_flow)
  74 -               return NULL;
  75 +               goto err_free_l2_flows;
  76
  77         mtk_ppe_debugfs_init(ppe, index);
  78
  79         return ppe;
  80 +
  81 +err_free_l2_flows:
  82 +       rhashtable_destroy(&ppe->l2_flows);
  83 +       return NULL;
  84 +}
  85 +
  86 +void mtk_ppe_deinit(struct mtk_eth *eth)
  87 +{
  88 +       int i;
  89 +
  90 +       for (i = 0; i < ARRAY_SIZE(eth->ppe); i++) {
  91 +               if (!eth->ppe[i])
  92 +                       return;
  93 +               rhashtable_destroy(&eth->ppe[i]->l2_flows);
  94 +       }
  95  }
  96
  97  static void mtk_ppe_init_foe_table(struct mtk_ppe *ppe)
  98 --- a/drivers/net/ethernet/mediatek/mtk_ppe.h
  99 +++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
 100 @@ -304,6 +304,7 @@ struct mtk_ppe {
 101
 102  struct mtk_ppe *mtk_ppe_init(struct mtk_eth *eth, void __iomem *base,
 103                              int version, int index);
 104 +void mtk_ppe_deinit(struct mtk_eth *eth);
 105  void mtk_ppe_start(struct mtk_ppe *ppe);
 106  int mtk_ppe_stop(struct mtk_ppe *ppe);
 107