From bce7698e2e6565bb765bd0522337f29f5f312624 Mon Sep 17 00:00:00 2001 From: Haojie Li Date: Tue, 25 Aug 2026 18:08:45 +0800 Subject: drm/mediatek: Add missing IS_ERR check for ovl_adaptor platform device 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 Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20260825100845.438893-1-lihaojie@kylinos.cn/ Signed-off-by: Chun-Kuang Hu --- tools/bpf/Makefile | 123 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 tools/bpf/Makefile (limited to 'tools/bpf/Makefile') diff --git a/tools/bpf/Makefile b/tools/bpf/Makefile new file mode 100644 index 000000000..9c19e81f3 --- /dev/null +++ b/tools/bpf/Makefile @@ -0,0 +1,123 @@ +# SPDX-License-Identifier: GPL-2.0 +include ../scripts/Makefile.include + +prefix ?= /usr/local + +LEX = flex +YACC = bison +MAKE = make +INSTALL ?= install + +CFLAGS += -Wall -O2 +CFLAGS += -D__EXPORTED_HEADERS__ -I$(srctree)/tools/include/uapi \ + -I$(srctree)/tools/include +CFLAGS += $(EXTRA_CFLAGS) + +# This will work when bpf is built in tools env. where srctree +# isn't set and when invoked from selftests build, where srctree +# is set to ".". building_out_of_srctree is undefined for in srctree +# builds +ifeq ($(srctree),) +update_srctree := 1 +endif +ifndef building_out_of_srctree +update_srctree := 1 +endif +ifeq ($(update_srctree),1) +srctree := $(patsubst %/,%,$(dir $(CURDIR))) +srctree := $(patsubst %/,%,$(dir $(srctree))) +endif + +FEATURE_USER = .bpf +FEATURE_TESTS = libbfd disassembler-four-args disassembler-init-styled +FEATURE_DISPLAY = libbfd + +check_feat := 1 +NON_CHECK_FEAT_TARGETS := clean bpftool_clean resolve_btfids_clean +ifdef MAKECMDGOALS +ifeq ($(filter-out $(NON_CHECK_FEAT_TARGETS),$(MAKECMDGOALS)),) + check_feat := 0 +endif +endif + +ifeq ($(check_feat),1) +ifeq ($(FEATURES_DUMP),) +include $(srctree)/tools/build/Makefile.feature +else +include $(FEATURES_DUMP) +endif +endif + +ifeq ($(feature-disassembler-four-args), 1) +CFLAGS += -DDISASM_FOUR_ARGS_SIGNATURE +endif +ifeq ($(feature-disassembler-init-styled), 1) +CFLAGS += -DDISASM_INIT_STYLED +endif + +$(OUTPUT)%.yacc.c: $(srctree)/tools/bpf/%.y + $(QUIET_BISON)$(YACC) -o $@ -d $< + +$(OUTPUT)%.lex.c: $(srctree)/tools/bpf/%.l + $(QUIET_FLEX)$(LEX) -o $@ $< + +$(OUTPUT)%.o: $(srctree)/tools/bpf/%.c + $(QUIET_CC)$(CC) $(CFLAGS) -c -o $@ $< + +$(OUTPUT)%.yacc.o: $(OUTPUT)%.yacc.c + $(QUIET_CC)$(CC) $(CFLAGS) -c -o $@ $< +$(OUTPUT)%.lex.o: $(OUTPUT)%.lex.c + $(QUIET_CC)$(CC) $(CFLAGS) -c -o $@ $< + +PROGS = $(OUTPUT)bpf_jit_disasm $(OUTPUT)bpf_dbg $(OUTPUT)bpf_asm + +all: $(PROGS) bpftool + +$(OUTPUT)bpf_jit_disasm: CFLAGS += -DPACKAGE='bpf_jit_disasm' +$(OUTPUT)bpf_jit_disasm: $(OUTPUT)bpf_jit_disasm.o + $(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $^ -lopcodes -lbfd -ldl + +$(OUTPUT)bpf_dbg: $(OUTPUT)bpf_dbg.o + $(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $^ -lreadline + +$(OUTPUT)bpf_asm: $(OUTPUT)bpf_asm.o $(OUTPUT)bpf_exp.yacc.o $(OUTPUT)bpf_exp.lex.o + $(QUIET_LINK)$(CC) $(CFLAGS) -o $@ $^ + +$(OUTPUT)bpf_exp.lex.c: $(OUTPUT)bpf_exp.yacc.c +$(OUTPUT)bpf_exp.yacc.o: $(OUTPUT)bpf_exp.yacc.c +$(OUTPUT)bpf_exp.lex.o: $(OUTPUT)bpf_exp.lex.c + +clean: bpftool_clean resolve_btfids_clean + $(call QUIET_CLEAN, bpf-progs) + $(Q)$(RM) -r -- $(OUTPUT)*.o $(OUTPUT)bpf_jit_disasm $(OUTPUT)bpf_dbg \ + $(OUTPUT)bpf_asm $(OUTPUT)bpf_exp.yacc.* $(OUTPUT)bpf_exp.lex.* + $(call QUIET_CLEAN, core-gen) + $(Q)$(RM) -- $(OUTPUT)FEATURE-DUMP.bpf + $(Q)$(RM) -r -- $(OUTPUT)feature + +install: $(PROGS) bpftool_install + $(call QUIET_INSTALL, bpf_jit_disasm) + $(Q)$(INSTALL) -m 0755 -d $(DESTDIR)$(prefix)/bin + $(Q)$(INSTALL) $(OUTPUT)bpf_jit_disasm $(DESTDIR)$(prefix)/bin/bpf_jit_disasm + $(call QUIET_INSTALL, bpf_dbg) + $(Q)$(INSTALL) $(OUTPUT)bpf_dbg $(DESTDIR)$(prefix)/bin/bpf_dbg + $(call QUIET_INSTALL, bpf_asm) + $(Q)$(INSTALL) $(OUTPUT)bpf_asm $(DESTDIR)$(prefix)/bin/bpf_asm + +bpftool: + $(call descend,bpftool) + +bpftool_install: + $(call descend,bpftool,install) + +bpftool_clean: + $(call descend,bpftool,clean) + +resolve_btfids: + $(call descend,resolve_btfids) + +resolve_btfids_clean: + $(call descend,resolve_btfids,clean) + +.PHONY: all install clean bpftool bpftool_install bpftool_clean \ + resolve_btfids resolve_btfids_clean -- cgit v1.3.1