[patch 4/4] drm/amdgpu: integer overflow in amdgpu_mode_dumb_create()

[Dan Carpenter]

args->size is a u64.  arg->pitch and args->height are u32.  The
multiplication will overflow instead of using the high 32 bits as
intended.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
index dac14de..2023055 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
@@ -656,7 +656,7 @@ int amdgpu_mode_dumb_create(struct drm_file *file_priv,
        int r;

        args->pitch = amdgpu_align_pitch(adev, args->width, args->bpp, 0) * 
((args->bpp + 1) / 8);
-       args->size = args->pitch * args->height;
+       args->size = (u64)args->pitch * args->height;
        args->size = ALIGN(args->size, PAGE_SIZE);

        r = amdgpu_gem_object_create(adev, args->size, 0,