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| author | Mario Limonciello <[email protected]> | 2025-07-24 20:00:43 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2025-08-18 21:56:25 +0000 |
| commit | 07b93a5704b0b72002f0c4bd1076214af67dc661 (patch) | |
| tree | dfda086a41c263bad004def84b34d6ca7aabdce9 | |
| parent | drm/amdgpu/swm14: Update power limit logic (diff) | |
| download | kernel-07b93a5704b0b72002f0c4bd1076214af67dc661.tar.gz kernel-07b93a5704b0b72002f0c4bd1076214af67dc661.zip | |
drm/amd/display: Avoid a NULL pointer dereference
[WHY]
Although unlikely drm_atomic_get_new_connector_state() or
drm_atomic_get_old_connector_state() can return NULL.
[HOW]
Check returns before dereference.
Cc: Mario Limonciello <[email protected]>
Cc: Alex Deucher <[email protected]>
Reviewed-by: Harry Wentland <[email protected]>
Signed-off-by: Mario Limonciello <[email protected]>
Signed-off-by: Alex Hung <[email protected]>
Tested-by: Dan Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
(cherry picked from commit 1e5e8d672fec9f2ab352be121be971877bff2af9)
Cc: [email protected]
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 |
1 files changed, 3 insertions, 0 deletions
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 cd0e2976e268..a0ca3b2c6bd8 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -7792,6 +7792,9 @@ amdgpu_dm_connector_atomic_check(struct drm_connector *conn, struct amdgpu_dm_connector *aconn = to_amdgpu_dm_connector(conn); int ret; + if (WARN_ON(unlikely(!old_con_state || !new_con_state))) + return -EINVAL; + trace_amdgpu_dm_connector_atomic_check(new_con_state); if (conn->connector_type == DRM_MODE_CONNECTOR_DisplayPort) { |