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>

1 files changed, 33 insertions, 0 deletions

diff --git a/tools/mm/Makefile b/tools/mm/Makefile
new file mode 100644
index 000000000..858186a6e
--- /dev/null
+++ b/tools/mm/Makefile
@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: GPL-2.0
+# Makefile for vm tools
+#
+include ../scripts/Makefile.include
+
+BUILD_TARGETS=page-types slabinfo page_owner_sort page_owner_filter thp_swap_allocator_test
+INSTALL_TARGETS = $(BUILD_TARGETS) thpmaps
+
+LIB_DIR = ../lib/api
+LIBS = $(LIB_DIR)/libapi.a
+
+CFLAGS += -Wall -Wextra -I../lib/ -pthread
+LDFLAGS += $(LIBS) -pthread
+
+all: $(BUILD_TARGETS)
+
+$(BUILD_TARGETS): $(LIBS)
+
+$(LIBS):
+	make -C $(LIB_DIR)
+
+%: %.c
+	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+
+clean:
+	$(RM) page-types slabinfo page_owner_sort page_owner_filter thp_swap_allocator_test
+	make -C $(LIB_DIR) clean
+
+sbindir ?= /usr/sbin
+
+install: all
+	install -d $(DESTDIR)$(sbindir)
+	install -m 755 -p $(INSTALL_TARGETS) $(DESTDIR)$(sbindir)