Date: Thu, 10 Nov 2022 16:47:26 +0300
Subject: [PATCH] drm/amdgpu/display: Add pointer check
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@xxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
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);
--
2.25.1
