drm/nouveau/kms/nv50: fix double dma_fence_put() when destroying plane state

When the atomic support was added to nouveau, the DRM core did not do this.

However, later in the same merge window, a commit (drm/fence: add in-fences
support) was merged that added it, leading to use-after-frees of the fence
object.

Cc: stable@vger.kernel.org	[4.10+]
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2017-04-05 18:16:14 +10:00
parent d639fbcc10
commit 2907e8670b

View File

@ -995,7 +995,6 @@ nv50_wndw_atomic_destroy_state(struct drm_plane *plane,
{
struct nv50_wndw_atom *asyw = nv50_wndw_atom(state);
__drm_atomic_helper_plane_destroy_state(&asyw->state);
dma_fence_put(asyw->state.fence);
kfree(asyw);
}
@ -1007,7 +1006,6 @@ nv50_wndw_atomic_duplicate_state(struct drm_plane *plane)
if (!(asyw = kmalloc(sizeof(*asyw), GFP_KERNEL)))
return NULL;
__drm_atomic_helper_plane_duplicate_state(plane, &asyw->state);
asyw->state.fence = NULL;
asyw->interval = 1;
asyw->sema = armw->sema;
asyw->ntfy = armw->ntfy;