target/linux/apm821xx/patches-4.14/020-0011-crypto-crypto4xx-fix-crypto4xx_build_pdr-crypto4xx_b.patch

   1 From 5d59ad6eea82ef8df92b4109615a0dde9d8093e9 Mon Sep 17 00:00:00 2001
   2 From: Christian Lamparter <chunkeey@googlemail.com>
   3 Date: Fri, 25 Aug 2017 15:47:24 +0200
   4 Subject: [PATCH 11/25] crypto: crypto4xx - fix crypto4xx_build_pdr,
   5  crypto4xx_build_sdr leak
   6
   7 If one of the later memory allocations in rypto4xx_build_pdr()
   8 fails: dev->pdr (and/or) dev->pdr_uinfo wouldn't be freed.
   9
  10 crypto4xx_build_sdr() has the same issue with dev->sdr.
  11
  12 Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
  13 Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
  14 ---
  15  drivers/crypto/amcc/crypto4xx_core.c | 17 +++++++++--------
  16  1 file changed, 9 insertions(+), 8 deletions(-)
  17
  18 --- a/drivers/crypto/amcc/crypto4xx_core.c
  19 +++ b/drivers/crypto/amcc/crypto4xx_core.c
  20 @@ -209,7 +209,7 @@ static u32 crypto4xx_build_pdr(struct cr
  21                                   dev->pdr_pa);
  22                 return -ENOMEM;
  23         }
  24 -       memset(dev->pdr, 0,  sizeof(struct ce_pd) * PPC4XX_NUM_PD);
  25 +       memset(dev->pdr, 0, sizeof(struct ce_pd) * PPC4XX_NUM_PD);
  26         dev->shadow_sa_pool = dma_alloc_coherent(dev->core_dev->device,
  27                                    256 * PPC4XX_NUM_PD,
  28                                    &dev->shadow_sa_pool_pa,
  29 @@ -242,13 +242,15 @@ static u32 crypto4xx_build_pdr(struct cr
  30
  31  static void crypto4xx_destroy_pdr(struct crypto4xx_device *dev)
  32  {
  33 -       if (dev->pdr != NULL)
  34 +       if (dev->pdr)
  35                 dma_free_coherent(dev->core_dev->device,
  36                                   sizeof(struct ce_pd) * PPC4XX_NUM_PD,
  37                                   dev->pdr, dev->pdr_pa);
  38 +
  39         if (dev->shadow_sa_pool)
  40                 dma_free_coherent(dev->core_dev->device, 256 * PPC4XX_NUM_PD,
  41                                   dev->shadow_sa_pool, dev->shadow_sa_pool_pa);
  42 +
  43         if (dev->shadow_sr_pool)
  44                 dma_free_coherent(dev->core_dev->device,
  45                         sizeof(struct sa_state_record) * PPC4XX_NUM_PD,
  46 @@ -417,12 +419,12 @@ static u32 crypto4xx_build_sdr(struct cr
  47
  48  static void crypto4xx_destroy_sdr(struct crypto4xx_device *dev)
  49  {
  50 -       if (dev->sdr != NULL)
  51 +       if (dev->sdr)
  52                 dma_free_coherent(dev->core_dev->device,
  53                                   sizeof(struct ce_sd) * PPC4XX_NUM_SD,
  54                                   dev->sdr, dev->sdr_pa);
  55
  56 -       if (dev->scatter_buffer_va != NULL)
  57 +       if (dev->scatter_buffer_va)
  58                 dma_free_coherent(dev->core_dev->device,
  59                                   PPC4XX_SD_BUFFER_SIZE * PPC4XX_NUM_SD,
  60                                   dev->scatter_buffer_va,
  61 @@ -1223,7 +1225,7 @@ static int crypto4xx_probe(struct platfo
  62
  63         rc = crypto4xx_build_gdr(core_dev->dev);
  64         if (rc)
  65 -               goto err_build_gdr;
  66 +               goto err_build_pdr;
  67
  68         rc = crypto4xx_build_sdr(core_dev->dev);
  69         if (rc)
  70 @@ -1266,12 +1268,11 @@ err_iomap:
  71  err_request_irq:
  72         irq_dispose_mapping(core_dev->irq);
  73         tasklet_kill(&core_dev->tasklet);
  74 -       crypto4xx_destroy_sdr(core_dev->dev);
  75  err_build_sdr:
  76 +       crypto4xx_destroy_sdr(core_dev->dev);
  77         crypto4xx_destroy_gdr(core_dev->dev);
  78 -err_build_gdr:
  79 -       crypto4xx_destroy_pdr(core_dev->dev);
  80  err_build_pdr:
  81 +       crypto4xx_destroy_pdr(core_dev->dev);
  82         kfree(core_dev->dev);
  83  err_alloc_dev:
  84         kfree(core_dev);