diff mbox series

drm/amdgpu/display: Add pointer check

Message ID 20221123120605.37265-1-arefev@swemel.ru
State New
Headers
Series drm/amdgpu/display: Add pointer check |

Commit Message

Denis Arefev Nov. 23, 2022, 12:06 p.m. UTC 
  Return value of a function 'dc_create_state' is
dereferenced at amdgpu_dm.c:2027 without checking for null

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Denis Arefev <arefev@swemel.ru>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 0f7749e9424d..529483997154 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1960,7 +1960,9 @@  static int dm_resume(void *handle)
 	dc_release_state(dm_state->context);
 	dm_state->context = dc_create_state(dm->dc);
 	/* TODO: Remove dc_state->dccg, use dc->dccg directly. */
-	dc_resource_state_construct(dm->dc, dm_state->context);
+	if (dm_state->context) {
+		dc_resource_state_construct(dm->dc, dm_state->context);
+	}
 
 	/* Before powering on DC we need to re-initialize DMUB. */
 	r = dm_dmub_hw_init(adev);