From: Dave Airlie <airlied@redhat.com>
Date: Tue, 3 Oct 2017 14:27:15 +1000
Subject: amdgpu/dm: don't use after free.
Git-commit: ae3a27d19b59e431aea9f9d5917c1aec710ae4c3
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

This dereference acrtc after freeing it.

Found by the kfree cocci script.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3174,7 +3174,6 @@ int amdgpu_dm_crtc_init(struct amdgpu_di
 fail:
 	kfree(acrtc);
 	kfree(cursor_plane);
-	acrtc->crtc_id = -1;
 	return res;
 }