[media] videobuf2-dma-sg: fix possible memory leak

Fix the return when 'buf->pages' allocation error.

Signed-off-by: Geyslan G. Bem <geyslan@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>

diff --git a/drivers/media/v4l2-core/videobuf2-dma-sg.c b/drivers/media/v4l2-core/videobuf2-dma-sg.c
index 2f86054..0d3a8ff 100644 (file)
--- a/drivers/media/v4l2-core/videobuf2-dma-sg.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-sg.c
@@ -178,7 +178,7 @@ static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr,
        buf->pages = kzalloc(buf->num_pages * sizeof(struct page *),
                             GFP_KERNEL);
        if (!buf->pages)
-               return NULL;
+               goto userptr_fail_alloc_pages;
 
        num_pages_from_user = get_user_pages(current, current->mm,
                                             vaddr & PAGE_MASK,
@@ -204,6 +204,7 @@ userptr_fail_get_user_pages:
        while (--num_pages_from_user >= 0)
                put_page(buf->pages[num_pages_from_user]);
        kfree(buf->pages);
+userptr_fail_alloc_pages:
        kfree(buf);
        return NULL;
 }