drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform devicegrafted

platform_device_register_data() can fail and return an ERR_PTR, but the
return value is used without checking, leading to an invalid pointer
being stored in ddp_comp[].dev and passed to component_match_add() and
mtk_ddp_comp_init(), which could result in a kernel crash.

Add an IS_ERR() check to jump to the error handling path on failure.

Fixes: 0d9eee9118b7 ("drm/mediatek: Add drm ovl_adaptor sub driver for MT8195")
Cc: stable@vger.kernel.org
Signed-off-by: Haojie Li <lihaojie@kylinos.cn>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260825100845.438893-1-lihaojie@kylinos.cn/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

14 files changed, 164 insertions, 0 deletions

diff --git a/Documentation/dev-tools/lkmm/docs/access-marking.rst b/Documentation/dev-tools/lkmm/docs/access-marking.rst
new file mode 100644
index 000000000..80058a4da
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/access-marking.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Access Marking
+--------------
+
+Literal include of ``tools/memory-model/Documentation/access-marking.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/access-marking.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/cheatsheet.rst b/Documentation/dev-tools/lkmm/docs/cheatsheet.rst
new file mode 100644
index 000000000..37681f6a6
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/cheatsheet.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Cheatsheet
+----------
+
+Literal include of ``tools/memory-model/Documentation/cheatsheet.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/cheatsheet.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/control-dependencies.rst b/Documentation/dev-tools/lkmm/docs/control-dependencies.rst
new file mode 100644
index 000000000..5ae97e886
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/control-dependencies.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Control Dependencies
+--------------------
+
+Literal include of ``tools/memory-model/Documentation/control-dependencies.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/control-dependencies.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/explanation.rst b/Documentation/dev-tools/lkmm/docs/explanation.rst
new file mode 100644
index 000000000..0bcba9a5d
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/explanation.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Explanation
+-----------
+
+Literal include of ``tools/memory-model/Documentation/explanation.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/explanation.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/glossary.rst b/Documentation/dev-tools/lkmm/docs/glossary.rst
new file mode 100644
index 000000000..849aefdf3
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/glossary.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Glossary
+--------
+
+Literal include of ``tools/memory-model/Documentation/glossary.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/glossary.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/herd-representation.rst b/Documentation/dev-tools/lkmm/docs/herd-representation.rst
new file mode 100644
index 000000000..f7b41f286
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/herd-representation.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+herd-representation
+-------------------
+
+Literal include of ``tools/memory-model/Documentation/herd-representation.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/herd-representation.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/index.rst b/Documentation/dev-tools/lkmm/docs/index.rst
new file mode 100644
index 000000000..abbddcc00
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/index.rst
@@ -0,0 +1,21 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Documentation
+=============
+
+.. toctree::
+   :maxdepth: 1
+
+   readme
+   simple
+   ordering
+   litmus-tests
+   locking
+   recipes
+   control-dependencies
+   access-marking
+   cheatsheet
+   explanation
+   herd-representation
+   glossary
+   references
diff --git a/Documentation/dev-tools/lkmm/docs/litmus-tests.rst b/Documentation/dev-tools/lkmm/docs/litmus-tests.rst
new file mode 100644
index 000000000..3293f4540
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/litmus-tests.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Litmus Tests
+------------
+
+Literal include of ``tools/memory-model/Documentation/litmus-tests.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/litmus-tests.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/locking.rst b/Documentation/dev-tools/lkmm/docs/locking.rst
new file mode 100644
index 000000000..b5eae4c0a
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/locking.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Locking
+-------
+
+Literal include of ``tools/memory-model/Documentation/locking.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/locking.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/ordering.rst b/Documentation/dev-tools/lkmm/docs/ordering.rst
new file mode 100644
index 000000000..a2343c124
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/ordering.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Ordering
+--------
+
+Literal include of ``tools/memory-model/Documentation/ordering.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/ordering.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/readme.rst b/Documentation/dev-tools/lkmm/docs/readme.rst
new file mode 100644
index 000000000..51e7a64e4
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/readme.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+README (for LKMM Documentation)
+-------------------------------
+
+Literal include of ``tools/memory-model/Documentation/README``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/README
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/recipes.rst b/Documentation/dev-tools/lkmm/docs/recipes.rst
new file mode 100644
index 000000000..e55952640
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/recipes.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Recipes
+-------
+
+Literal include of ``tools/memory-model/Documentation/recipes.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/recipes.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/references.rst b/Documentation/dev-tools/lkmm/docs/references.rst
new file mode 100644
index 000000000..c6831b3c9
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/references.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+References
+----------
+
+Literal include of ``tools/memory-model/Documentation/references.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/references.txt
+   :literal:
diff --git a/Documentation/dev-tools/lkmm/docs/simple.rst b/Documentation/dev-tools/lkmm/docs/simple.rst
new file mode 100644
index 000000000..5c1094c95
--- /dev/null
+++ b/Documentation/dev-tools/lkmm/docs/simple.rst
@@ -0,0 +1,11 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+Simple
+------
+
+Literal include of ``tools/memory-model/Documentation/simple.txt``.
+
+------------------------------------------------------------------
+
+.. kernel-include:: tools/memory-model/Documentation/simple.txt
+   :literal: