target/linux/bcm27xx/patches-5.4/950-0739-dma-buf-fix-resource-leak-on-ENOTTY-error-return-pat.patch

   1 From 0960432c8261efb05bcf5ba6d8fe13c8293086a9 Mon Sep 17 00:00:00 2001
   2 From: Colin Ian King <colin.king@canonical.com>
   3 Date: Mon, 16 Dec 2019 16:10:59 +0000
   4 Subject: [PATCH] dma-buf: fix resource leak on -ENOTTY error return
   5  path
   6
   7 Commit f9d3b2c600075d1f79efcd5cdb1718c2f554c0f9 upstream.
   8
   9 The -ENOTTY error return path does not free the allocated
  10 kdata as it returns directly. Fix this by returning via the
  11 error handling label err.
  12
  13 Addresses-Coverity: ("Resource leak")
  14 Fixes: c02a81fba74f ("dma-buf: Add dma-buf heaps framework")
  15 Signed-off-by: Colin Ian King <colin.king@canonical.com>
  16 Acked-by: John Stultz <john.stultz@linaro.org>
  17 Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
  18 Link: https://patchwork.freedesktop.org/patch/msgid/20191216161059.269492-1-colin.king@canonical.com
  19 ---
  20  drivers/dma-buf/dma-heap.c | 3 ++-
  21  1 file changed, 2 insertions(+), 1 deletion(-)
  22
  23 --- a/drivers/dma-buf/dma-heap.c
  24 +++ b/drivers/dma-buf/dma-heap.c
  25 @@ -157,7 +157,8 @@ static long dma_heap_ioctl(struct file *
  26                 ret = dma_heap_ioctl_allocate(file, kdata);
  27                 break;
  28         default:
  29 -               return -ENOTTY;
  30 +               ret = -ENOTTY;
  31 +               goto err;
  32         }
  33
  34         if (copy_to_user((void __user *)arg, kdata, out_size) != 0)