dma-buf: fix resource leak on -ENOTTY error return path

The -ENOTTY error return path does not free the allocated
kdata as it returns directly. Fix this by returning via the
error handling label err.

Addresses-Coverity: ("Resource leak")
Fixes: c02a81fba74f ("dma-buf: Add dma-buf heaps framework")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191216161059.269492-1-colin.king@canonical.com

diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c
index a2472149611496657364d8160e4424bfc40c215e..1886aee4613157cfd182ae737cde548ea120d0cd 100644 (file)
--- a/drivers/dma-buf/dma-heap.c
+++ b/drivers/dma-buf/dma-heap.c
@@ -157,7 +157,8 @@ static long dma_heap_ioctl(struct file *file, unsigned int ucmd,
                ret = dma_heap_ioctl_allocate(file, kdata);
                break;
        default:
-               return -ENOTTY;
+               ret = -ENOTTY;
+               goto err;
        }
 
        if (copy_to_user((void __user *)arg, kdata, out_size) != 0)