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, 54 insertions, 0 deletions

diff --git a/tools/thermal/tmon/Makefile b/tools/thermal/tmon/Makefile
new file mode 100644
index 000000000..f9c52b7fa
--- /dev/null
+++ b/tools/thermal/tmon/Makefile
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: GPL-2.0
+# We need this for the "cc-option" macro.
+include ../../build/Build.include
+
+VERSION = 1.0
+
+BINDIR=usr/bin
+WARNFLAGS=-Wall -Wshadow -W -Wformat -Wimplicit-function-declaration -Wimplicit-int
+override CFLAGS+= $(call cc-option,-O3,-O1) ${WARNFLAGS}
+# Add "-fstack-protector" only if toolchain supports it.
+override CFLAGS+= $(call cc-option,-fstack-protector-strong)
+CC?= $(CROSS_COMPILE)gcc
+PKG_CONFIG?= $(CROSS_COMPILE)pkg-config
+
+override CFLAGS+=-D VERSION=\"$(VERSION)\"
+TARGET=tmon
+
+INSTALL_PROGRAM=install -m 755 -p
+DEL_FILE=rm -f
+
+# Static builds might require -ltinfo, for instance
+ifneq ($(findstring -static, $(LDFLAGS)),)
+STATIC := --static
+endif
+
+TMON_LIBS=-lm -lpthread
+TMON_LIBS += $(shell $(PKG_CONFIG) --libs $(STATIC) panelw ncursesw 2> /dev/null || \
+		     $(PKG_CONFIG) --libs $(STATIC) panel ncurses 2> /dev/null || \
+		     echo -lpanel -lncurses)
+
+override CFLAGS += $(shell $(PKG_CONFIG) --cflags $(STATIC) panelw ncursesw 2> /dev/null || \
+		     $(PKG_CONFIG) --cflags $(STATIC) panel ncurses 2> /dev/null)
+
+OBJS = tmon.o tui.o sysfs.o pid.o
+
+tmon: $(OBJS) Makefile tmon.h
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJS)  -o $(TARGET) $(TMON_LIBS)
+
+valgrind: tmon
+	 sudo valgrind -v --track-origins=yes --tool=memcheck --leak-check=yes --show-reachable=yes --num-callers=20 --track-fds=yes ./$(TARGET)  1> /dev/null
+
+install:
+	- $(INSTALL_PROGRAM) -D "$(TARGET)" "$(INSTALL_ROOT)/$(BINDIR)/$(TARGET)"
+
+uninstall:
+	$(DEL_FILE) "$(INSTALL_ROOT)/$(BINDIR)/$(TARGET)"
+
+clean:
+	rm -f $(TARGET) $(OBJS)
+
+dist:
+	git tag v$(VERSION)
+	git archive --format=tar --prefix="$(TARGET)-$(VERSION)/" v$(VERSION) | \
+		gzip > $(TARGET)-$(VERSION).tar.gz