AI Trajectory

Trajectory: (Expand/Collapse All)
Seq	Timestamp	Type	Name	Duration
0/0	2026/07/30 04:14	flow	patch-triage	0m Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies Makefiles for BPF selftests to fix out-of-tree builds (when OUTPUT is set). It does not contain any functional changes to the kernel code, drivers, or architectures.", "WorthFuzzing": false }
1/1	2026/07/30 04:14	action	read-patch-diff	0m Args: null Results: { "PatchDiff": "commit 7f4389c1a61f3c64996085af737a1ee8bd296e3a\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate: Thu Jul 30 04:14:31 2026 +0000\n\n syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile\nindex b642ee489ea64..b150a66f3c251 100644\n--- a/tools/testing/selftests/bpf/Makefile\n+++ b/tools/testing/selftests/bpf/Makefile\n@@ -135,6 +135,9 @@ TEST_PROGS_EXTENDED := \\\n TEST_KMODS := bpf_testmod.ko bpf_test_no_cfi.ko bpf_test_modorder_x.ko \\\n \tbpf_test_modorder_y.ko bpf_test_rqspinlock.ko\n TEST_KMOD_TARGETS = $(addprefix $(OUTPUT)/,$(TEST_KMODS))\n+# Build directory for kernel modules: routed to $(OUTPUT)/test_kmods when\n+# OUTPUT is set so that kbuild intermediates stay out of the source tree.\n+TEST_KMODS_OUTDIR := $(if $(OUTPUT),$(OUTPUT)/test_kmods,test_kmods)\n \n # Compile but not part of 'make run_tests'\n TEST_GEN_PROGS_EXTENDED = \\\n@@ -163,8 +166,8 @@ override define CLEAN\n \t$(Q)$(RM) -r $(TEST_GEN_FILES)\n \t$(Q)$(RM) -r $(TEST_KMODS)\n \t$(Q)$(RM) -r $(EXTRA_CLEAN)\n-\t$(Q)$(MAKE) -C test_kmods clean\n-\t$(Q)$(MAKE) -C libarena clean\n+\t$(Q)$(MAKE) -C test_kmods $(if $(OUTPUT),OUTPUT=$(OUTPUT)/test_kmods) clean\n+\t$(Q)$(MAKE) -C libarena $(if $(OUTPUT),OUTPUT=$(OUTPUT)/libarena) clean\n \t$(Q)$(MAKE) docs-clean\n endef\n \n@@ -301,17 +304,18 @@ $(OUTPUT)/sign-file: ../../../../scripts/sign-file.c\n # support that for regular rules. However, pattern matching rules are implicitly\n # treated as grouped even with older versions of make, so as a workaround, the\n # subst() turns the rule into a pattern matching rule\n-$(addprefix test_kmods/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/.[ch])\n-\t$(Q)$(RM) test_kmods/.ko test_kmods/.mod.o # force re-compilation\n+$(addprefix $(TEST_KMODS_OUTDIR)/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/.[ch])\n+\t$(Q)$(RM) $(TEST_KMODS_OUTDIR)/.ko $(TEST_KMODS_OUTDIR)/.mod.o # force re-compilation\n \t$(Q)$(MAKE) $(submake_extras) -C test_kmods\t\t\t\t\\\n \t\t$(if $(O),O=$(abspath $(O)))\t\t\t\t\t\\\n \t\t$(if $(KBUILD_OUTPUT),KBUILD_OUTPUT=$(abspath $(KBUILD_OUTPUT)))\\\n+\t\t$(if $(OUTPUT),OUTPUT=$(OUTPUT)/test_kmods)\t\t\t\\\n \t\tRESOLVE_BTFIDS=$(RESOLVE_BTFIDS)\t\t\t\t\\\n \t\tEXTRA_CFLAGS='' EXTRA_LDFLAGS=''\n \n-$(TEST_KMOD_TARGETS): $(addprefix test_kmods/,$(TEST_KMODS))\n+$(TEST_KMOD_TARGETS): $(addprefix $(TEST_KMODS_OUTDIR)/,$(TEST_KMODS))\n \t$(call msg,MOD,,$@)\n-\t$(Q)$(if $(PERMISSIVE),if [ -f test_kmods/$(@F) ]; then )cp test_kmods/$(@F) $@$(if $(PERMISSIVE),; fi)\n+\t$(Q)$(if $(PERMISSIVE),if [ -f $(TEST_KMODS_OUTDIR)/$(@F) ]; then )cp $(TEST_KMODS_OUTDIR)/$(@F) $@$(if $(PERMISSIVE),; fi)\n \n \n DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool\n@@ -580,7 +584,7 @@ TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,\t\t\\\n TRUNNER_LIB_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,\t\t\\\n \t\t\t\t $$(filter %.c,$(TRUNNER_LIB_SOURCES)))\n TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))\n-TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h\n+TRUNNER_TESTS_HDR := $(OUTPUT)/$(TRUNNER_TESTS_DIR)/tests.h\n TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/.c))\n TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.bpf.o, $$(TRUNNER_BPF_SRCS))\n TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,\t\\\n@@ -720,9 +724,9 @@ endif\n # ensure we set up tests.h header generation rule just once\n ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)\n $(TRUNNER_TESTS_DIR)-tests-hdr := y\n-$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/.c\n+$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/.c \| $(TRUNNER_OUTPUT)\n \t$$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)\n-\t$$(shell (echo '/ Generated header, do not edit /';\t\t\t\t\t\\\n+\t$$(shell mkdir -p $$(dir $$@) \u0026\u0026 (echo '/ Generated header, do not edit /';\t\t\t\\\n \t\t sed -n -E 's/^void (serial_)?test_([a-zA-Z0-9_]+)\\((void)?\\)./DEFINE_TEST(\\2)/p'\t\\\n \t\t\t$(TRUNNER_TESTS_DIR)/.c \| sort ;\t\\\n \t\t ) \u003e $$@)\n@@ -802,7 +806,7 @@ $(OUTPUT)/$(TRUNNER_BINARY): $(if $(filter test_progs%,$1),$(if $(PERMISSIVE),$$\n endef\n \n VERIFY_SIG_SETUP := $(CURDIR)/verify_sig_setup.sh\n-VERIFY_SIG_HDR := verification_cert.h\n+VERIFY_SIG_HDR := $(OUTPUT)/verification_cert.h\n VERIFICATION_CERT := $(BUILD_DIR)/signing_key.der\n PRIVATE_KEY := $(BUILD_DIR)/signing_key.pem\n \n@@ -826,7 +830,8 @@ LIBARENA_MAKE_ARGS = \\\n \t\tCLANG=\"$(CLANG)\" \\\n \t\tBPF_CFLAGS=\"$(BPF_CFLAGS) $(CLANG_CFLAGS)\" \\\n \t\tBPF_TARGET_ENDIAN=\"$(BPF_TARGET_ENDIAN)\" \\\n-\t\tQ=\"$(Q)\"\n+\t\tQ=\"$(Q)\" \\\n+\t\tOUTPUT=\"$(OUTPUT)/libarena\"\n \n LIBARENA_BPF_DEPS := $(wildcard libarena/Makefile\t\t\\\n \t\t\t\t libarena/include/\t\t\\\n@@ -835,17 +840,17 @@ LIBARENA_BPF_DEPS := $(wildcard libarena/Makefile\t\t\\\n \t\t\t\t libarena/selftests/\t\t\\\n \t\t\t\t libarena/.bpf.o)\n \n-LIBARENA_SKEL := libarena/libarena.skel.h\n+LIBARENA_SKEL := $(OUTPUT)/libarena/libarena.skel.h\n \n $(LIBARENA_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS)\n-\t+$(MAKE) -C libarena libarena.skel.h $(LIBARENA_MAKE_ARGS)\n+\t+$(MAKE) -C libarena $(LIBARENA_SKEL) $(LIBARENA_MAKE_ARGS)\n \n ifneq ($(CLANG_HAS_ARENA_ASAN),)\n-LIBARENA_ASAN_SKEL := libarena/libarena_asan.skel.h\n+LIBARENA_ASAN_SKEL := $(OUTPUT)/libarena/libarena_asan.skel.h\n CFLAGS += -DHAS_BPF_ARENA_ASAN\n \n $(LIBARENA_ASAN_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS)\n-\t+$(MAKE) -C libarena libarena_asan.skel.h $(LIBARENA_MAKE_ARGS)\n+\t+$(MAKE) -C libarena $(LIBARENA_ASAN_SKEL) $(LIBARENA_MAKE_ARGS)\n endif\n \n # Define test_progs test runner.\n@@ -923,14 +928,14 @@ $(eval $(call DEFINE_TEST_RUNNER,test_maps))\n # It is much simpler than test_maps/test_progs and sufficiently different from\n # them (e.g., test.h is using completely pattern), that it's worth just\n # explicitly defining all the rules explicitly.\n-verifier/tests.h: verifier/.c\n-\t$(shell ( cd verifier/; \\\n+$(OUTPUT)/verifier/tests.h: verifier/.c \| $(OUTPUT)\n+\t$(shell mkdir -p $(OUTPUT)/verifier \u0026\u0026 ( \\\n \t\t echo '/* Generated header, do not edit /'; \\\n \t\t echo '#ifdef FILL_ARRAY'; \\\n-\t\t ls .c 2\u003e /dev/null \| sed -e 's@\\(.\\)@#include \\\"\\1\\\"@'; \\\n+\t\t ls verifier/.c 2\u003e /dev/null \| sed -e 's@\\(.\\)@#include \"$(CURDIR)/\\1\"@'; \\\n \t\t echo '#endif' \\\n-\t\t) \u003e verifier/tests.h)\n-$(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) \| $(OUTPUT)\n+\t\t) \u003e $(OUTPUT)/verifier/tests.h)\n+$(OUTPUT)/test_verifier: test_verifier.c $(OUTPUT)/verifier/tests.h $(BPFOBJ) \| $(OUTPUT)\n \t$(call msg,BINARY,,$@)\n \t$(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@\n \ndiff --git a/tools/testing/selftests/bpf/libarena/Makefile b/tools/testing/selftests/bpf/libarena/Makefile\nindex 5e2ab514805e4..195d5f833186a 100644\n--- a/tools/testing/selftests/bpf/libarena/Makefile\n+++ b/tools/testing/selftests/bpf/libarena/Makefile\n@@ -27,10 +27,14 @@ BPFDIR=$(abspath $(LIBARENA)/..)\n INCLUDE_DIR ?= $(BPFDIR)/tools/include\n LIBBPF_INCLUDE ?= $(INCLUDE_DIR)\n \n+# Build output directory; defaults to in-tree for standalone builds.\n+OUTPUT ?= .\n+$(shell mkdir -p $(OUTPUT))\n+\n # Scan src/ and selftests/ to generate the final binaries\n LIBARENA_SOURCES = $(wildcard $(LIBARENA)/src/.bpf.c) $(wildcard $(LIBARENA)/selftests/.bpf.c)\n-LIBARENA_OBJECTS = $(notdir $(LIBARENA_SOURCES:.bpf.c=.bpf.o))\n-LIBARENA_OBJECTS_ASAN = $(notdir $(LIBARENA_SOURCES:.bpf.c=_asan.bpf.o))\n+LIBARENA_OBJECTS = $(addprefix $(OUTPUT)/,$(notdir $(LIBARENA_SOURCES:.bpf.c=.bpf.o)))\n+LIBARENA_OBJECTS_ASAN = $(addprefix $(OUTPUT)/,$(notdir $(LIBARENA_SOURCES:.bpf.c=_asan.bpf.o)))\n \n INCLUDES = -I$(LIBARENA)/include -I$(BPFDIR)\n ifneq ($(INCLUDE_DIR),)\n@@ -61,32 +65,32 @@ CFLAGS += $(INCLUDES)\n vpath %.bpf.c $(LIBARENA)/src $(LIBARENA)/selftests\n vpath %.c $(LIBARENA)/src $(LIBARENA)/selftests\n \n-skeletons: libarena.skel.h libarena_asan.skel.h\n+skeletons: $(OUTPUT)/libarena.skel.h $(OUTPUT)/libarena_asan.skel.h\n .PHONY: skeletons\n \n-libarena_asan.skel.h: libarena_asan.bpf.o\n+$(OUTPUT)/libarena_asan.skel.h: $(OUTPUT)/libarena_asan.bpf.o\n \t$(call msg,GEN-SKEL,libarena,$@)\n \t$(Q)$(BPFTOOL) gen skeleton $\u003c name \"libarena_asan\" \u003e $@\n \n-libarena.skel.h: libarena.bpf.o\n+$(OUTPUT)/libarena.skel.h: $(OUTPUT)/libarena.bpf.o\n \t$(call msg,GEN-SKEL,libarena,$@)\n \t$(Q)$(BPFTOOL) gen skeleton $\u003c name \"libarena\" \u003e $@\n \n-libarena_asan.bpf.o: $(LIBARENA_OBJECTS_ASAN)\n+$(OUTPUT)/libarena_asan.bpf.o: $(LIBARENA_OBJECTS_ASAN)\n \t$(call msg,GEN-OBJ,libarena,$@)\n \t$(Q)$(BPFTOOL) gen object $@ $^\n \n-libarena.bpf.o: $(LIBARENA_OBJECTS)\n+$(OUTPUT)/libarena.bpf.o: $(LIBARENA_OBJECTS)\n \t$(call msg,GEN-OBJ,libarena,$@)\n \t$(Q)$(BPFTOOL) gen object $@ $^\n \n-%_asan.bpf.o: %.bpf.c\n+$(OUTPUT)/%_asan.bpf.o: %.bpf.c\n \t$(call msg,CLNG-BPF,libarena,$@)\n \t$(Q)$(CLANG) $(BPF_CFLAGS) $(ASAN_FLAGS) -DBPF_ARENA_ASAN $(BPF_TARGET_ENDIAN) -c $\u003c -o $@\n \n-%.bpf.o: %.bpf.c\n+$(OUTPUT)/%.bpf.o: %.bpf.c\n \t$(call msg,CLNG-BPF,libarena,$@)\n \t$(Q)$(CLANG) $(BPF_CFLAGS) $(BPF_TARGET_ENDIAN) -c $\u003c -o $@\n \n clean:\n-\t$(Q)rm -f .skel.h .bpf.o .linked.o\n+\t$(Q)rm -f $(OUTPUT)/.skel.h $(OUTPUT)/.bpf.o $(OUTPUT)/.linked*.o\ndiff --git a/tools/testing/selftests/bpf/test_kmods/Makefile b/tools/testing/selftests/bpf/test_kmods/Makefile\nindex 031c7454ce65f..53e47e715ec44 100644\n--- a/tools/testing/selftests/bpf/test_kmods/Makefile\n+++ b/tools/testing/selftests/bpf/test_kmods/Makefile\n@@ -32,14 +32,17 @@ PERMISSIVE := $(filter 0,$(BPF_STRICT_BUILD))\n all:\n ifeq ($(PERMISSIVE),)\n \t$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \\\n+\t\t$(if $(OUTPUT),MO=$(OUTPUT)) \\\n \t\tM=$(TEST_KMOD_DIR) modules\n else ifneq (\"$(wildcard $(KDIR))\", \"\")\n \t$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \\\n+\t\t$(if $(OUTPUT),MO=$(OUTPUT)) \\\n \t\tM=$(TEST_KMOD_DIR) modules\n endif\n \n clean:\n ifneq (\"$(wildcard $(KDIR))\", \"\")\n \t$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \\\n+\t\t$(if $(OUTPUT),MO=$(OUTPUT)) \\\n \t\tM=$(TEST_KMOD_DIR) clean\n endif\n" }
2/1	2026/07/30 04:14	agent	patch-evaluator	0m Model: best-expensive Args: null Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies Makefiles for BPF selftests to fix out-of-tree builds (when OUTPUT is set). It does not contain any functional changes to the kernel code, drivers, or architectures.", "WorthFuzzing": false } Instruction: You are an expert Linux kernel maintainer. Your job is to review a provided patch series and determine if it makes functional changes to the kernel that should be fuzzed. IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively use your code access tools to examine the actual source code and confirm any assumptions. Return WorthFuzzing=false if the patch only contains: - Modifications to Documentation/, Kconfig files, or code comments. - Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints. - Changes to numeric constants or macros that do not functionally alter execution flow. - Code paths that are impossible to reach in virtualized environments like GCE or QEMU, even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim). - Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed, ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU. - Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove) that are executed only during PCI hot-unplug or sysfs driver unbind operations. If it modifies reachable core kernel logic, drivers, or architectures, use your code search tools to verify the code can be executed, then return WorthFuzzing=true. When returning WorthFuzzing=true, you MUST ALSO: 1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols. Avoid listing generic hot-path functions to prevent skewed test distributions. Prefer non-static, non-inlined API entrypoint functions over internal static helper functions (which are inlined by the compiler and do not have distinct symbol addresses). 2. Identify any specific CONFIG_ options required to properly test this new/modified feature. Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions. Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs needed for Kbuild to compile the code statically into vmlinux. List them in the EnableConfigs output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4"). Prefer calling several tools at the same time to save round-trips. Use set-results tool to provide results of the analysis. It must be called exactly once before the final reply. Ignore results of this tool. Prompt: For your convenience, here is the diff of the changes: commit 7f4389c1a61f3c64996085af737a1ee8bd296e3a Author: syz-cluster <triage@syzkaller.com> Date: Thu Jul 30 04:14:31 2026 +0000 syz-cluster: applied patch under review diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index b642ee489ea64..b150a66f3c251 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -135,6 +135,9 @@ TEST_PROGS_EXTENDED := \ TEST_KMODS := bpf_testmod.ko bpf_test_no_cfi.ko bpf_test_modorder_x.ko \ bpf_test_modorder_y.ko bpf_test_rqspinlock.ko TEST_KMOD_TARGETS = $(addprefix $(OUTPUT)/,$(TEST_KMODS)) +# Build directory for kernel modules: routed to $(OUTPUT)/test_kmods when +# OUTPUT is set so that kbuild intermediates stay out of the source tree. +TEST_KMODS_OUTDIR := $(if $(OUTPUT),$(OUTPUT)/test_kmods,test_kmods) # Compile but not part of 'make run_tests' TEST_GEN_PROGS_EXTENDED = \ @@ -163,8 +166,8 @@ override define CLEAN $(Q)$(RM) -r $(TEST_GEN_FILES) $(Q)$(RM) -r $(TEST_KMODS) $(Q)$(RM) -r $(EXTRA_CLEAN) - $(Q)$(MAKE) -C test_kmods clean - $(Q)$(MAKE) -C libarena clean + $(Q)$(MAKE) -C test_kmods $(if $(OUTPUT),OUTPUT=$(OUTPUT)/test_kmods) clean + $(Q)$(MAKE) -C libarena $(if $(OUTPUT),OUTPUT=$(OUTPUT)/libarena) clean $(Q)$(MAKE) docs-clean endef @@ -301,17 +304,18 @@ $(OUTPUT)/sign-file: ../../../../scripts/sign-file.c # support that for regular rules. However, pattern matching rules are implicitly # treated as grouped even with older versions of make, so as a workaround, the # subst() turns the rule into a pattern matching rule -$(addprefix test_kmods/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/.[ch]) - $(Q)$(RM) test_kmods/.ko test_kmods/.mod.o # force re-compilation +$(addprefix $(TEST_KMODS_OUTDIR)/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/.[ch]) + $(Q)$(RM) $(TEST_KMODS_OUTDIR)/.ko $(TEST_KMODS_OUTDIR)/.mod.o # force re-compilation $(Q)$(MAKE) $(submake_extras) -C test_kmods \ $(if $(O),O=$(abspath $(O))) \ $(if $(KBUILD_OUTPUT),KBUILD_OUTPUT=$(abspath $(KBUILD_OUTPUT)))\ + $(if $(OUTPUT),OUTPUT=$(OUTPUT)/test_kmods) \ RESOLVE_BTFIDS=$(RESOLVE_BTFIDS) \ EXTRA_CFLAGS='' EXTRA_LDFLAGS='' -$(TEST_KMOD_TARGETS): $(addprefix test_kmods/,$(TEST_KMODS)) +$(TEST_KMOD_TARGETS): $(addprefix $(TEST_KMODS_OUTDIR)/,$(TEST_KMODS)) $(call msg,MOD,,$@) - $(Q)$(if $(PERMISSIVE),if [ -f test_kmods/$(@F) ]; then )cp test_kmods/$(@F) $@$(if $(PERMISSIVE),; fi) + $(Q)$(if $(PERMISSIVE),if [ -f $(TEST_KMODS_OUTDIR)/$(@F) ]; then )cp $(TEST_KMODS_OUTDIR)/$(@F) $@$(if $(PERMISSIVE),; fi) DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool @@ -580,7 +584,7 @@ TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, \ TRUNNER_LIB_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o, \ $$(filter %.c,$(TRUNNER_LIB_SOURCES))) TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES)) -TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h +TRUNNER_TESTS_HDR := $(OUTPUT)/$(TRUNNER_TESTS_DIR)/tests.h TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/.c)) TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.bpf.o, $$(TRUNNER_BPF_SRCS)) TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h, \ @@ -720,9 +724,9 @@ endif # ensure we set up tests.h header generation rule just once ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),) $(TRUNNER_TESTS_DIR)-tests-hdr := y -$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/.c +$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/.c \| $(TRUNNER_OUTPUT) $$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@) - $$(shell (echo '/ Generated header, do not edit /'; \ + $$(shell mkdir -p $$(dir $$@) && (echo '/ Generated header, do not edit /'; \ sed -n -E 's/^void (serial_)?test_([a-zA-Z0-9_]+)\((void)?\)./DEFINE_TEST(\2)/p' \ $(TRUNNER_TESTS_DIR)/.c \| sort ; \ ) > $$@) @@ -802,7 +806,7 @@ $(OUTPUT)/$(TRUNNER_BINARY): $(if $(filter test_progs%,$1),$(if $(PERMISSIVE),$$ endef VERIFY_SIG_SETUP := $(CURDIR)/verify_sig_setup.sh -VERIFY_SIG_HDR := verification_cert.h +VERIFY_SIG_HDR := $(OUTPUT)/verification_cert.h VERIFICATION_CERT := $(BUILD_DIR)/signing_key.der PRIVATE_KEY := $(BUILD_DIR)/signing_key.pem @@ -826,7 +830,8 @@ LIBARENA_MAKE_ARGS = \ CLANG="$(CLANG)" \ BPF_CFLAGS="$(BPF_CFLAGS) $(CLANG_CFLAGS)" \ BPF_TARGET_ENDIAN="$(BPF_TARGET_ENDIAN)" \ - Q="$(Q)" + Q="$(Q)" \ + OUTPUT="$(OUTPUT)/libarena" LIBARENA_BPF_DEPS := $(wildcard libarena/Makefile \ libarena/include/ \ @@ -835,17 +840,17 @@ LIBARENA_BPF_DEPS := $(wildcard libarena/Makefile \ libarena/selftests/* \ libarena/.bpf.o) -LIBARENA_SKEL := libarena/libarena.skel.h +LIBARENA_SKEL := $(OUTPUT)/libarena/libarena.skel.h $(LIBARENA_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS) - +$(MAKE) -C libarena libarena.skel.h $(LIBARENA_MAKE_ARGS) + +$(MAKE) -C libarena $(LIBARENA_SKEL) $(LIBARENA_MAKE_ARGS) ifneq ($(CLANG_HAS_ARENA_ASAN),) -LIBARENA_ASAN_SKEL := libarena/libarena_asan.skel.h +LIBARENA_ASAN_SKEL := $(OUTPUT)/libarena/libarena_asan.skel.h CFLAGS += -DHAS_BPF_ARENA_ASAN $(LIBARENA_ASAN_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS) - +$(MAKE) -C libarena libarena_asan.skel.h $(LIBARENA_MAKE_ARGS) + +$(MAKE) -C libarena $(LIBARENA_ASAN_SKEL) $(LIBARENA_MAKE_ARGS) endif # Define test_progs test runner. @@ -923,14 +928,14 @@ $(eval $(call DEFINE_TEST_RUNNER,test_maps)) # It is much simpler than test_maps/test_progs and sufficiently different from # them (e.g., test.h is using completely pattern), that it's worth just # explicitly defining all the rules explicitly. -verifier/tests.h: verifier/.c - $(shell ( cd verifier/; \ +$(OUTPUT)/verifier/tests.h: verifier/.c \| $(OUTPUT) + $(shell mkdir -p $(OUTPUT)/verifier && ( \ echo '/ Generated header, do not edit /'; \ echo '#ifdef FILL_ARRAY'; \ - ls .c 2> /dev/null \| sed -e 's@\(.\)@#include \"\1\"@'; \ + ls verifier/.c 2> /dev/null \| sed -e 's@\(.\)@#include "$(CURDIR)/\1"@'; \ echo '#endif' \ - ) > verifier/tests.h) -$(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) \| $(OUTPUT) + ) > $(OUTPUT)/verifier/tests.h) +$(OUTPUT)/test_verifier: test_verifier.c $(OUTPUT)/verifier/tests.h $(BPFOBJ) \| $(OUTPUT) $(call msg,BINARY,,$@) $(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@ diff --git a/tools/testing/selftests/bpf/libarena/Makefile b/tools/testing/selftests/bpf/libarena/Makefile index 5e2ab514805e4..195d5f833186a 100644 --- a/tools/testing/selftests/bpf/libarena/Makefile +++ b/tools/testing/selftests/bpf/libarena/Makefile @@ -27,10 +27,14 @@ BPFDIR=$(abspath $(LIBARENA)/..) INCLUDE_DIR ?= $(BPFDIR)/tools/include LIBBPF_INCLUDE ?= $(INCLUDE_DIR) +# Build output directory; defaults to in-tree for standalone builds. +OUTPUT ?= . +$(shell mkdir -p $(OUTPUT)) + # Scan src/ and selftests/ to generate the final binaries LIBARENA_SOURCES = $(wildcard $(LIBARENA)/src/.bpf.c) $(wildcard $(LIBARENA)/selftests/.bpf.c) -LIBARENA_OBJECTS = $(notdir $(LIBARENA_SOURCES:.bpf.c=.bpf.o)) -LIBARENA_OBJECTS_ASAN = $(notdir $(LIBARENA_SOURCES:.bpf.c=_asan.bpf.o)) +LIBARENA_OBJECTS = $(addprefix $(OUTPUT)/,$(notdir $(LIBARENA_SOURCES:.bpf.c=.bpf.o))) +LIBARENA_OBJECTS_ASAN = $(addprefix $(OUTPUT)/,$(notdir $(LIBARENA_SOURCES:.bpf.c=_asan.bpf.o))) INCLUDES = -I$(LIBARENA)/include -I$(BPFDIR) ifneq ($(INCLUDE_DIR),) @@ -61,32 +65,32 @@ CFLAGS += $(INCLUDES) vpath %.bpf.c $(LIBARENA)/src $(LIBARENA)/selftests vpath %.c $(LIBARENA)/src $(LIBARENA)/selftests -skeletons: libarena.skel.h libarena_asan.skel.h +skeletons: $(OUTPUT)/libarena.skel.h $(OUTPUT)/libarena_asan.skel.h .PHONY: skeletons -libarena_asan.skel.h: libarena_asan.bpf.o +$(OUTPUT)/libarena_asan.skel.h: $(OUTPUT)/libarena_asan.bpf.o $(call msg,GEN-SKEL,libarena,$@) $(Q)$(BPFTOOL) gen skeleton $< name "libarena_asan" > $@ -libarena.skel.h: libarena.bpf.o +$(OUTPUT)/libarena.skel.h: $(OUTPUT)/libarena.bpf.o $(call msg,GEN-SKEL,libarena,$@) $(Q)$(BPFTOOL) gen skeleton $< name "libarena" > $@ -libarena_asan.bpf.o: $(LIBARENA_OBJECTS_ASAN) +$(OUTPUT)/libarena_asan.bpf.o: $(LIBARENA_OBJECTS_ASAN) $(call msg,GEN-OBJ,libarena,$@) $(Q)$(BPFTOOL) gen object $@ $^ -libarena.bpf.o: $(LIBARENA_OBJECTS) +$(OUTPUT)/libarena.bpf.o: $(LIBARENA_OBJECTS) $(call msg,GEN-OBJ,libarena,$@) $(Q)$(BPFTOOL) gen object $@ $^ -%_asan.bpf.o: %.bpf.c +$(OUTPUT)/%_asan.bpf.o: %.bpf.c $(call msg,CLNG-BPF,libarena,$@) $(Q)$(CLANG) $(BPF_CFLAGS) $(ASAN_FLAGS) -DBPF_ARENA_ASAN $(BPF_TARGET_ENDIAN) -c $< -o $@ -%.bpf.o: %.bpf.c +$(OUTPUT)/%.bpf.o: %.bpf.c $(call msg,CLNG-BPF,libarena,$@) $(Q)$(CLANG) $(BPF_CFLAGS) $(BPF_TARGET_ENDIAN) -c $< -o $@ clean: - $(Q)rm -f .skel.h .bpf.o .linked.o + $(Q)rm -f $(OUTPUT)/.skel.h $(OUTPUT)/.bpf.o $(OUTPUT)/.linked*.o diff --git a/tools/testing/selftests/bpf/test_kmods/Makefile b/tools/testing/selftests/bpf/test_kmods/Makefile index 031c7454ce65f..53e47e715ec44 100644 --- a/tools/testing/selftests/bpf/test_kmods/Makefile +++ b/tools/testing/selftests/bpf/test_kmods/Makefile @@ -32,14 +32,17 @@ PERMISSIVE := $(filter 0,$(BPF_STRICT_BUILD)) all: ifeq ($(PERMISSIVE),) $(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \ + $(if $(OUTPUT),MO=$(OUTPUT)) \ M=$(TEST_KMOD_DIR) modules else ifneq ("$(wildcard $(KDIR))", "") $(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \ + $(if $(OUTPUT),MO=$(OUTPUT)) \ M=$(TEST_KMOD_DIR) modules endif clean: ifneq ("$(wildcard $(KDIR))", "") $(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \ + $(if $(OUTPUT),MO=$(OUTPUT)) \ M=$(TEST_KMOD_DIR) clean endif
3/2	2026/07/30 04:14	llm	patch-evaluator	0m Model: gemini-3.1-pro-preview Args: null Results: null Tokens: input: 6078 output: 74 thoughts: 241 Thoughts: WorthFuzzing=false: A Quick Assessment Okay, here's the deal: I've got a patch in front of me that touches some Makefiles within the BPF selftest framework. Specifically, it's modifying `tools/testing/selftests/bpf/Makefile`, `tools/testing/selftests/bpf/libarena/Makefile`, and `tools/testing/selftests/bpf/test_kmods/Makefile`. My immediate concern, as always, is whether this warrants fuzzing effort. From my initial scan, the changes are entirely confined to the build system itself. This patch is just adjusting how the BPF selftests are built, specifically dealing with output directories when `OUTPUT` is defined. There's no modification of actual kernel code, no alterations to drivers, and certainly no architecture-specific changes. This is purely build system housekeeping. Let me just quickly confirm that with a deeper look at the diff. Yep, just Makefile modifications for out-of-tree builds. No C code has been touched, nothing that introduces any new functionality or bug potential at runtime. So, given the nature of the changes, I can confidently declare this patch as not worth fuzzing. I'll flag `WorthFuzzing=false` and submit the results.
4/2	2026/07/30 04:14	tool	set-results	0m Args: { "EnableConfigs": [], "FocusSymbols": [], "Reasoning": "The patch only modifies Makefiles for BPF selftests to fix out-of-tree builds (when OUTPUT is set). It does not contain any functional changes to the kernel code, drivers, or architectures.", "WorthFuzzing": false } Results: { "EnableConfigs": null, "FocusSymbols": [], "Reasoning": "The patch only modifies Makefiles for BPF selftests to fix out-of-tree builds (when OUTPUT is set). It does not contain any functional changes to the kernel code, drivers, or architectures.", "WorthFuzzing": false }

Trajectory: (Expand/Collapse All)

Seq

Timestamp

Type

Name

Duration

0/0

2026/07/30 04:14

flow

patch-triage

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies Makefiles for BPF selftests to fix out-of-tree builds (when OUTPUT is set). It does not contain any functional changes to the kernel code, drivers, or architectures.",
  "WorthFuzzing": false
}

1/1

2026/07/30 04:14

action

read-patch-diff

Args:

null

Results:

{
  "PatchDiff": "commit 7f4389c1a61f3c64996085af737a1ee8bd296e3a\nAuthor: syz-cluster \u003ctriage@syzkaller.com\u003e\nDate:   Thu Jul 30 04:14:31 2026 +0000\n\n    syz-cluster: applied patch under review\n\ndiff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile\nindex b642ee489ea64..b150a66f3c251 100644\n--- a/tools/testing/selftests/bpf/Makefile\n+++ b/tools/testing/selftests/bpf/Makefile\n@@ -135,6 +135,9 @@ TEST_PROGS_EXTENDED := \\\n TEST_KMODS := bpf_testmod.ko bpf_test_no_cfi.ko bpf_test_modorder_x.ko \\\n \tbpf_test_modorder_y.ko bpf_test_rqspinlock.ko\n TEST_KMOD_TARGETS = $(addprefix $(OUTPUT)/,$(TEST_KMODS))\n+# Build directory for kernel modules: routed to $(OUTPUT)/test_kmods when\n+# OUTPUT is set so that kbuild intermediates stay out of the source tree.\n+TEST_KMODS_OUTDIR := $(if $(OUTPUT),$(OUTPUT)/test_kmods,test_kmods)\n \n # Compile but not part of 'make run_tests'\n TEST_GEN_PROGS_EXTENDED = \\\n@@ -163,8 +166,8 @@ override define CLEAN\n \t$(Q)$(RM) -r $(TEST_GEN_FILES)\n \t$(Q)$(RM) -r $(TEST_KMODS)\n \t$(Q)$(RM) -r $(EXTRA_CLEAN)\n-\t$(Q)$(MAKE) -C test_kmods clean\n-\t$(Q)$(MAKE) -C libarena clean\n+\t$(Q)$(MAKE) -C test_kmods $(if $(OUTPUT),OUTPUT=$(OUTPUT)/test_kmods) clean\n+\t$(Q)$(MAKE) -C libarena $(if $(OUTPUT),OUTPUT=$(OUTPUT)/libarena) clean\n \t$(Q)$(MAKE) docs-clean\n endef\n \n@@ -301,17 +304,18 @@ $(OUTPUT)/sign-file: ../../../../scripts/sign-file.c\n # support that for regular rules. However, pattern matching rules are implicitly\n # treated as grouped even with older versions of make, so as a workaround, the\n # subst() turns the rule into a pattern matching rule\n-$(addprefix test_kmods/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/*.[ch])\n-\t$(Q)$(RM) test_kmods/*.ko test_kmods/*.mod.o # force re-compilation\n+$(addprefix $(TEST_KMODS_OUTDIR)/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/*.[ch])\n+\t$(Q)$(RM) $(TEST_KMODS_OUTDIR)/*.ko $(TEST_KMODS_OUTDIR)/*.mod.o # force re-compilation\n \t$(Q)$(MAKE) $(submake_extras) -C test_kmods\t\t\t\t\\\n \t\t$(if $(O),O=$(abspath $(O)))\t\t\t\t\t\\\n \t\t$(if $(KBUILD_OUTPUT),KBUILD_OUTPUT=$(abspath $(KBUILD_OUTPUT)))\\\n+\t\t$(if $(OUTPUT),OUTPUT=$(OUTPUT)/test_kmods)\t\t\t\\\n \t\tRESOLVE_BTFIDS=$(RESOLVE_BTFIDS)\t\t\t\t\\\n \t\tEXTRA_CFLAGS='' EXTRA_LDFLAGS=''\n \n-$(TEST_KMOD_TARGETS): $(addprefix test_kmods/,$(TEST_KMODS))\n+$(TEST_KMOD_TARGETS): $(addprefix $(TEST_KMODS_OUTDIR)/,$(TEST_KMODS))\n \t$(call msg,MOD,,$@)\n-\t$(Q)$(if $(PERMISSIVE),if [ -f test_kmods/$(@F) ]; then )cp test_kmods/$(@F) $@$(if $(PERMISSIVE),; fi)\n+\t$(Q)$(if $(PERMISSIVE),if [ -f $(TEST_KMODS_OUTDIR)/$(@F) ]; then )cp $(TEST_KMODS_OUTDIR)/$(@F) $@$(if $(PERMISSIVE),; fi)\n \n \n DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool\n@@ -580,7 +584,7 @@ TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,\t\t\\\n TRUNNER_LIB_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,\t\t\\\n \t\t\t\t $$(filter %.c,$(TRUNNER_LIB_SOURCES)))\n TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))\n-TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h\n+TRUNNER_TESTS_HDR := $(OUTPUT)/$(TRUNNER_TESTS_DIR)/tests.h\n TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))\n TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.bpf.o, $$(TRUNNER_BPF_SRCS))\n TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,\t\\\n@@ -720,9 +724,9 @@ endif\n # ensure we set up tests.h header generation rule just once\n ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)\n $(TRUNNER_TESTS_DIR)-tests-hdr := y\n-$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c\n+$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c | $(TRUNNER_OUTPUT)\n \t$$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)\n-\t$$(shell (echo '/* Generated header, do not edit */';\t\t\t\t\t\\\n+\t$$(shell mkdir -p $$(dir $$@) \u0026\u0026 (echo '/* Generated header, do not edit */';\t\t\t\\\n \t\t  sed -n -E 's/^void (serial_)?test_([a-zA-Z0-9_]+)\\((void)?\\).*/DEFINE_TEST(\\2)/p'\t\\\n \t\t\t$(TRUNNER_TESTS_DIR)/*.c | sort ;\t\\\n \t\t ) \u003e $$@)\n@@ -802,7 +806,7 @@ $(OUTPUT)/$(TRUNNER_BINARY): $(if $(filter test_progs%,$1),$(if $(PERMISSIVE),$$\n endef\n \n VERIFY_SIG_SETUP := $(CURDIR)/verify_sig_setup.sh\n-VERIFY_SIG_HDR := verification_cert.h\n+VERIFY_SIG_HDR := $(OUTPUT)/verification_cert.h\n VERIFICATION_CERT   := $(BUILD_DIR)/signing_key.der\n PRIVATE_KEY := $(BUILD_DIR)/signing_key.pem\n \n@@ -826,7 +830,8 @@ LIBARENA_MAKE_ARGS = \\\n \t\tCLANG=\"$(CLANG)\" \\\n \t\tBPF_CFLAGS=\"$(BPF_CFLAGS) $(CLANG_CFLAGS)\" \\\n \t\tBPF_TARGET_ENDIAN=\"$(BPF_TARGET_ENDIAN)\" \\\n-\t\tQ=\"$(Q)\"\n+\t\tQ=\"$(Q)\" \\\n+\t\tOUTPUT=\"$(OUTPUT)/libarena\"\n \n LIBARENA_BPF_DEPS := $(wildcard libarena/Makefile\t\t\\\n \t\t\t\t libarena/include/*\t\t\\\n@@ -835,17 +840,17 @@ LIBARENA_BPF_DEPS := $(wildcard libarena/Makefile\t\t\\\n \t\t\t\t libarena/selftests/*\t\t\\\n \t\t\t\t libarena/*.bpf.o)\n \n-LIBARENA_SKEL := libarena/libarena.skel.h\n+LIBARENA_SKEL := $(OUTPUT)/libarena/libarena.skel.h\n \n $(LIBARENA_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS)\n-\t+$(MAKE) -C libarena libarena.skel.h $(LIBARENA_MAKE_ARGS)\n+\t+$(MAKE) -C libarena $(LIBARENA_SKEL) $(LIBARENA_MAKE_ARGS)\n \n ifneq ($(CLANG_HAS_ARENA_ASAN),)\n-LIBARENA_ASAN_SKEL := libarena/libarena_asan.skel.h\n+LIBARENA_ASAN_SKEL := $(OUTPUT)/libarena/libarena_asan.skel.h\n CFLAGS += -DHAS_BPF_ARENA_ASAN\n \n $(LIBARENA_ASAN_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS)\n-\t+$(MAKE) -C libarena libarena_asan.skel.h $(LIBARENA_MAKE_ARGS)\n+\t+$(MAKE) -C libarena $(LIBARENA_ASAN_SKEL) $(LIBARENA_MAKE_ARGS)\n endif\n \n # Define test_progs test runner.\n@@ -923,14 +928,14 @@ $(eval $(call DEFINE_TEST_RUNNER,test_maps))\n # It is much simpler than test_maps/test_progs and sufficiently different from\n # them (e.g., test.h is using completely pattern), that it's worth just\n # explicitly defining all the rules explicitly.\n-verifier/tests.h: verifier/*.c\n-\t$(shell ( cd verifier/; \\\n+$(OUTPUT)/verifier/tests.h: verifier/*.c | $(OUTPUT)\n+\t$(shell mkdir -p $(OUTPUT)/verifier \u0026\u0026 ( \\\n \t\t  echo '/* Generated header, do not edit */'; \\\n \t\t  echo '#ifdef FILL_ARRAY'; \\\n-\t\t  ls *.c 2\u003e /dev/null | sed -e 's@\\(.*\\)@#include \\\"\\1\\\"@'; \\\n+\t\t  ls verifier/*.c 2\u003e /dev/null | sed -e 's@\\(.*\\)@#include \"$(CURDIR)/\\1\"@'; \\\n \t\t  echo '#endif' \\\n-\t\t) \u003e verifier/tests.h)\n-$(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)\n+\t\t) \u003e $(OUTPUT)/verifier/tests.h)\n+$(OUTPUT)/test_verifier: test_verifier.c $(OUTPUT)/verifier/tests.h $(BPFOBJ) | $(OUTPUT)\n \t$(call msg,BINARY,,$@)\n \t$(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@\n \ndiff --git a/tools/testing/selftests/bpf/libarena/Makefile b/tools/testing/selftests/bpf/libarena/Makefile\nindex 5e2ab514805e4..195d5f833186a 100644\n--- a/tools/testing/selftests/bpf/libarena/Makefile\n+++ b/tools/testing/selftests/bpf/libarena/Makefile\n@@ -27,10 +27,14 @@ BPFDIR=$(abspath $(LIBARENA)/..)\n INCLUDE_DIR ?= $(BPFDIR)/tools/include\n LIBBPF_INCLUDE ?= $(INCLUDE_DIR)\n \n+# Build output directory; defaults to in-tree for standalone builds.\n+OUTPUT ?= .\n+$(shell mkdir -p $(OUTPUT))\n+\n # Scan src/ and selftests/ to generate the final binaries\n LIBARENA_SOURCES = $(wildcard $(LIBARENA)/src/*.bpf.c) $(wildcard $(LIBARENA)/selftests/*.bpf.c)\n-LIBARENA_OBJECTS = $(notdir $(LIBARENA_SOURCES:.bpf.c=.bpf.o))\n-LIBARENA_OBJECTS_ASAN = $(notdir $(LIBARENA_SOURCES:.bpf.c=_asan.bpf.o))\n+LIBARENA_OBJECTS = $(addprefix $(OUTPUT)/,$(notdir $(LIBARENA_SOURCES:.bpf.c=.bpf.o)))\n+LIBARENA_OBJECTS_ASAN = $(addprefix $(OUTPUT)/,$(notdir $(LIBARENA_SOURCES:.bpf.c=_asan.bpf.o)))\n \n INCLUDES = -I$(LIBARENA)/include -I$(BPFDIR)\n ifneq ($(INCLUDE_DIR),)\n@@ -61,32 +65,32 @@ CFLAGS += $(INCLUDES)\n vpath %.bpf.c $(LIBARENA)/src $(LIBARENA)/selftests\n vpath %.c $(LIBARENA)/src $(LIBARENA)/selftests\n \n-skeletons: libarena.skel.h libarena_asan.skel.h\n+skeletons: $(OUTPUT)/libarena.skel.h $(OUTPUT)/libarena_asan.skel.h\n .PHONY: skeletons\n \n-libarena_asan.skel.h: libarena_asan.bpf.o\n+$(OUTPUT)/libarena_asan.skel.h: $(OUTPUT)/libarena_asan.bpf.o\n \t$(call msg,GEN-SKEL,libarena,$@)\n \t$(Q)$(BPFTOOL) gen skeleton $\u003c name \"libarena_asan\" \u003e $@\n \n-libarena.skel.h: libarena.bpf.o\n+$(OUTPUT)/libarena.skel.h: $(OUTPUT)/libarena.bpf.o\n \t$(call msg,GEN-SKEL,libarena,$@)\n \t$(Q)$(BPFTOOL) gen skeleton $\u003c name \"libarena\" \u003e $@\n \n-libarena_asan.bpf.o: $(LIBARENA_OBJECTS_ASAN)\n+$(OUTPUT)/libarena_asan.bpf.o: $(LIBARENA_OBJECTS_ASAN)\n \t$(call msg,GEN-OBJ,libarena,$@)\n \t$(Q)$(BPFTOOL) gen object $@ $^\n \n-libarena.bpf.o: $(LIBARENA_OBJECTS)\n+$(OUTPUT)/libarena.bpf.o: $(LIBARENA_OBJECTS)\n \t$(call msg,GEN-OBJ,libarena,$@)\n \t$(Q)$(BPFTOOL) gen object $@ $^\n \n-%_asan.bpf.o: %.bpf.c\n+$(OUTPUT)/%_asan.bpf.o: %.bpf.c\n \t$(call msg,CLNG-BPF,libarena,$@)\n \t$(Q)$(CLANG) $(BPF_CFLAGS) $(ASAN_FLAGS) -DBPF_ARENA_ASAN $(BPF_TARGET_ENDIAN) -c $\u003c -o $@\n \n-%.bpf.o: %.bpf.c\n+$(OUTPUT)/%.bpf.o: %.bpf.c\n \t$(call msg,CLNG-BPF,libarena,$@)\n \t$(Q)$(CLANG) $(BPF_CFLAGS) $(BPF_TARGET_ENDIAN) -c $\u003c -o $@\n \n clean:\n-\t$(Q)rm -f *.skel.h *.bpf.o *.linked*.o\n+\t$(Q)rm -f $(OUTPUT)/*.skel.h $(OUTPUT)/*.bpf.o $(OUTPUT)/*.linked*.o\ndiff --git a/tools/testing/selftests/bpf/test_kmods/Makefile b/tools/testing/selftests/bpf/test_kmods/Makefile\nindex 031c7454ce65f..53e47e715ec44 100644\n--- a/tools/testing/selftests/bpf/test_kmods/Makefile\n+++ b/tools/testing/selftests/bpf/test_kmods/Makefile\n@@ -32,14 +32,17 @@ PERMISSIVE := $(filter 0,$(BPF_STRICT_BUILD))\n all:\n ifeq ($(PERMISSIVE),)\n \t$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \\\n+\t\t$(if $(OUTPUT),MO=$(OUTPUT)) \\\n \t\tM=$(TEST_KMOD_DIR) modules\n else ifneq (\"$(wildcard $(KDIR))\", \"\")\n \t$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \\\n+\t\t$(if $(OUTPUT),MO=$(OUTPUT)) \\\n \t\tM=$(TEST_KMOD_DIR) modules\n endif\n \n clean:\n ifneq (\"$(wildcard $(KDIR))\", \"\")\n \t$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \\\n+\t\t$(if $(OUTPUT),MO=$(OUTPUT)) \\\n \t\tM=$(TEST_KMOD_DIR) clean\n endif\n"
}

2/1

2026/07/30 04:14

agent

patch-evaluator

Model:

best-expensive

Args:

null

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies Makefiles for BPF selftests to fix out-of-tree builds (when OUTPUT is set). It does not contain any functional changes to the kernel code, drivers, or architectures.",
  "WorthFuzzing": false
}

Instruction:

You are an expert Linux kernel maintainer.
Your job is to review a provided patch series and determine
if it makes functional changes to the kernel that should be fuzzed.

IMPORTANT: The changes have ALREADY been applied and committed as the HEAD commit in
your workspace. Do NOT rely on your internal knowledge of the kernel. You must actively
use your code access tools to examine the actual source code and confirm any assumptions.

Return WorthFuzzing=false if the patch only contains:
- Modifications to Documentation/, Kconfig files, or code comments.
- Purely decorative changes, such as logging (e.g., pr_err, printk) or tracepoints.
- Changes to numeric constants or macros that do not functionally alter execution flow.
- Code paths that are impossible to reach in virtualized environments like GCE or QEMU,
  even when utilizing software-emulated hardware (e.g., usb gadget, mac80211_hwsim).
- Code in vendor-specific PCIe switch, SmartNIC, or GPU drivers (e.g., mlxsw, pds_core, qed,
  ionic, amdgpu) that require physical PCIe hardware cards not emulated in standard QEMU.
- Driver .remove, .shutdown, or pci_unregister_driver teardown callbacks (e.g., igb_remove)
  that are executed only during PCI hot-unplug or sysfs driver unbind operations.

If it modifies reachable core kernel logic, drivers, or architectures, use your code search
tools to verify the code can be executed, then return WorthFuzzing=true.

When returning WorthFuzzing=true, you MUST ALSO:
1. Extract any specific kernel functions that should be heavily fuzzed into FocusSymbols.
   Avoid listing generic hot-path functions to prevent skewed test distributions.
   Prefer non-static, non-inlined API entrypoint functions over internal static helper functions
   (which are inlined by the compiler and do not have distinct symbol addresses).
2. Identify any specific CONFIG_ options required to properly test this new/modified feature.
   Go and look into the Kconfig files and check for ifdefs around the code, do not make assumptions.
   Also check "depends on" lines in Kconfig to include any non-standard parent subsystem configs
   needed for Kbuild to compile the code statically into vmlinux. List them in the EnableConfigs
   output array, and DO NOT add a 'CONFIG_' prefix (e.g., return "NET_IPV4" instead of "CONFIG_NET_IPV4").
Prefer calling several tools at the same time to save round-trips.


Use set-results tool to provide results of the analysis.
It must be called exactly once before the final reply.
Ignore results of this tool.

Prompt:

For your convenience, here is the diff of the changes:
commit 7f4389c1a61f3c64996085af737a1ee8bd296e3a
Author: syz-cluster <triage@syzkaller.com>
Date:   Thu Jul 30 04:14:31 2026 +0000

    syz-cluster: applied patch under review

diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index b642ee489ea64..b150a66f3c251 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -135,6 +135,9 @@ TEST_PROGS_EXTENDED := \
 TEST_KMODS := bpf_testmod.ko bpf_test_no_cfi.ko bpf_test_modorder_x.ko \
 	bpf_test_modorder_y.ko bpf_test_rqspinlock.ko
 TEST_KMOD_TARGETS = $(addprefix $(OUTPUT)/,$(TEST_KMODS))
+# Build directory for kernel modules: routed to $(OUTPUT)/test_kmods when
+# OUTPUT is set so that kbuild intermediates stay out of the source tree.
+TEST_KMODS_OUTDIR := $(if $(OUTPUT),$(OUTPUT)/test_kmods,test_kmods)
 
 # Compile but not part of 'make run_tests'
 TEST_GEN_PROGS_EXTENDED = \
@@ -163,8 +166,8 @@ override define CLEAN
 	$(Q)$(RM) -r $(TEST_GEN_FILES)
 	$(Q)$(RM) -r $(TEST_KMODS)
 	$(Q)$(RM) -r $(EXTRA_CLEAN)
-	$(Q)$(MAKE) -C test_kmods clean
-	$(Q)$(MAKE) -C libarena clean
+	$(Q)$(MAKE) -C test_kmods $(if $(OUTPUT),OUTPUT=$(OUTPUT)/test_kmods) clean
+	$(Q)$(MAKE) -C libarena $(if $(OUTPUT),OUTPUT=$(OUTPUT)/libarena) clean
 	$(Q)$(MAKE) docs-clean
 endef
 
@@ -301,17 +304,18 @@ $(OUTPUT)/sign-file: ../../../../scripts/sign-file.c
 # support that for regular rules. However, pattern matching rules are implicitly
 # treated as grouped even with older versions of make, so as a workaround, the
 # subst() turns the rule into a pattern matching rule
-$(addprefix test_kmods/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/*.[ch])
-	$(Q)$(RM) test_kmods/*.ko test_kmods/*.mod.o # force re-compilation
+$(addprefix $(TEST_KMODS_OUTDIR)/,$(subst .ko,%ko,$(TEST_KMODS))): $(VMLINUX_BTF) $(RESOLVE_BTFIDS) $(wildcard test_kmods/Makefile test_kmods/*.[ch])
+	$(Q)$(RM) $(TEST_KMODS_OUTDIR)/*.ko $(TEST_KMODS_OUTDIR)/*.mod.o # force re-compilation
 	$(Q)$(MAKE) $(submake_extras) -C test_kmods				\
 		$(if $(O),O=$(abspath $(O)))					\
 		$(if $(KBUILD_OUTPUT),KBUILD_OUTPUT=$(abspath $(KBUILD_OUTPUT)))\
+		$(if $(OUTPUT),OUTPUT=$(OUTPUT)/test_kmods)			\
 		RESOLVE_BTFIDS=$(RESOLVE_BTFIDS)				\
 		EXTRA_CFLAGS='' EXTRA_LDFLAGS=''
 
-$(TEST_KMOD_TARGETS): $(addprefix test_kmods/,$(TEST_KMODS))
+$(TEST_KMOD_TARGETS): $(addprefix $(TEST_KMODS_OUTDIR)/,$(TEST_KMODS))
 	$(call msg,MOD,,$@)
-	$(Q)$(if $(PERMISSIVE),if [ -f test_kmods/$(@F) ]; then )cp test_kmods/$(@F) $@$(if $(PERMISSIVE),; fi)
+	$(Q)$(if $(PERMISSIVE),if [ -f $(TEST_KMODS_OUTDIR)/$(@F) ]; then )cp $(TEST_KMODS_OUTDIR)/$(@F) $@$(if $(PERMISSIVE),; fi)
 
 
 DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
@@ -580,7 +584,7 @@ TRUNNER_EXTRA_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,		\
 TRUNNER_LIB_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.o,		\
 				 $$(filter %.c,$(TRUNNER_LIB_SOURCES)))
 TRUNNER_EXTRA_HDRS := $$(filter %.h,$(TRUNNER_EXTRA_SOURCES))
-TRUNNER_TESTS_HDR := $(TRUNNER_TESTS_DIR)/tests.h
+TRUNNER_TESTS_HDR := $(OUTPUT)/$(TRUNNER_TESTS_DIR)/tests.h
 TRUNNER_BPF_SRCS := $$(notdir $$(wildcard $(TRUNNER_BPF_PROGS_DIR)/*.c))
 TRUNNER_BPF_OBJS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.bpf.o, $$(TRUNNER_BPF_SRCS))
 TRUNNER_BPF_SKELS := $$(patsubst %.c,$$(TRUNNER_OUTPUT)/%.skel.h,	\
@@ -720,9 +724,9 @@ endif
 # ensure we set up tests.h header generation rule just once
 ifeq ($($(TRUNNER_TESTS_DIR)-tests-hdr),)
 $(TRUNNER_TESTS_DIR)-tests-hdr := y
-$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c
+$(TRUNNER_TESTS_HDR): $(TRUNNER_TESTS_DIR)/*.c | $(TRUNNER_OUTPUT)
 	$$(call msg,TEST-HDR,$(TRUNNER_BINARY),$$@)
-	$$(shell (echo '/* Generated header, do not edit */';					\
+	$$(shell mkdir -p $$(dir $$@) && (echo '/* Generated header, do not edit */';			\
 		  sed -n -E 's/^void (serial_)?test_([a-zA-Z0-9_]+)\((void)?\).*/DEFINE_TEST(\2)/p'	\
 			$(TRUNNER_TESTS_DIR)/*.c | sort ;	\
 		 ) > $$@)
@@ -802,7 +806,7 @@ $(OUTPUT)/$(TRUNNER_BINARY): $(if $(filter test_progs%,$1),$(if $(PERMISSIVE),$$
 endef
 
 VERIFY_SIG_SETUP := $(CURDIR)/verify_sig_setup.sh
-VERIFY_SIG_HDR := verification_cert.h
+VERIFY_SIG_HDR := $(OUTPUT)/verification_cert.h
 VERIFICATION_CERT   := $(BUILD_DIR)/signing_key.der
 PRIVATE_KEY := $(BUILD_DIR)/signing_key.pem
 
@@ -826,7 +830,8 @@ LIBARENA_MAKE_ARGS = \
 		CLANG="$(CLANG)" \
 		BPF_CFLAGS="$(BPF_CFLAGS) $(CLANG_CFLAGS)" \
 		BPF_TARGET_ENDIAN="$(BPF_TARGET_ENDIAN)" \
-		Q="$(Q)"
+		Q="$(Q)" \
+		OUTPUT="$(OUTPUT)/libarena"
 
 LIBARENA_BPF_DEPS := $(wildcard libarena/Makefile		\
 				 libarena/include/*		\
@@ -835,17 +840,17 @@ LIBARENA_BPF_DEPS := $(wildcard libarena/Makefile		\
 				 libarena/selftests/*		\
 				 libarena/*.bpf.o)
 
-LIBARENA_SKEL := libarena/libarena.skel.h
+LIBARENA_SKEL := $(OUTPUT)/libarena/libarena.skel.h
 
 $(LIBARENA_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS)
-	+$(MAKE) -C libarena libarena.skel.h $(LIBARENA_MAKE_ARGS)
+	+$(MAKE) -C libarena $(LIBARENA_SKEL) $(LIBARENA_MAKE_ARGS)
 
 ifneq ($(CLANG_HAS_ARENA_ASAN),)
-LIBARENA_ASAN_SKEL := libarena/libarena_asan.skel.h
+LIBARENA_ASAN_SKEL := $(OUTPUT)/libarena/libarena_asan.skel.h
 CFLAGS += -DHAS_BPF_ARENA_ASAN
 
 $(LIBARENA_ASAN_SKEL): $(INCLUDE_DIR)/vmlinux.h $(BPFOBJ) $(LIBARENA_BPF_DEPS)
-	+$(MAKE) -C libarena libarena_asan.skel.h $(LIBARENA_MAKE_ARGS)
+	+$(MAKE) -C libarena $(LIBARENA_ASAN_SKEL) $(LIBARENA_MAKE_ARGS)
 endif
 
 # Define test_progs test runner.
@@ -923,14 +928,14 @@ $(eval $(call DEFINE_TEST_RUNNER,test_maps))
 # It is much simpler than test_maps/test_progs and sufficiently different from
 # them (e.g., test.h is using completely pattern), that it's worth just
 # explicitly defining all the rules explicitly.
-verifier/tests.h: verifier/*.c
-	$(shell ( cd verifier/; \
+$(OUTPUT)/verifier/tests.h: verifier/*.c | $(OUTPUT)
+	$(shell mkdir -p $(OUTPUT)/verifier && ( \
 		  echo '/* Generated header, do not edit */'; \
 		  echo '#ifdef FILL_ARRAY'; \
-		  ls *.c 2> /dev/null | sed -e 's@\(.*\)@#include \"\1\"@'; \
+		  ls verifier/*.c 2> /dev/null | sed -e 's@\(.*\)@#include "$(CURDIR)/\1"@'; \
 		  echo '#endif' \
-		) > verifier/tests.h)
-$(OUTPUT)/test_verifier: test_verifier.c verifier/tests.h $(BPFOBJ) | $(OUTPUT)
+		) > $(OUTPUT)/verifier/tests.h)
+$(OUTPUT)/test_verifier: test_verifier.c $(OUTPUT)/verifier/tests.h $(BPFOBJ) | $(OUTPUT)
 	$(call msg,BINARY,,$@)
 	$(Q)$(CC) $(CFLAGS) $(filter %.a %.o %.c,$^) $(LDLIBS) -o $@
 
diff --git a/tools/testing/selftests/bpf/libarena/Makefile b/tools/testing/selftests/bpf/libarena/Makefile
index 5e2ab514805e4..195d5f833186a 100644
--- a/tools/testing/selftests/bpf/libarena/Makefile
+++ b/tools/testing/selftests/bpf/libarena/Makefile
@@ -27,10 +27,14 @@ BPFDIR=$(abspath $(LIBARENA)/..)
 INCLUDE_DIR ?= $(BPFDIR)/tools/include
 LIBBPF_INCLUDE ?= $(INCLUDE_DIR)
 
+# Build output directory; defaults to in-tree for standalone builds.
+OUTPUT ?= .
+$(shell mkdir -p $(OUTPUT))
+
 # Scan src/ and selftests/ to generate the final binaries
 LIBARENA_SOURCES = $(wildcard $(LIBARENA)/src/*.bpf.c) $(wildcard $(LIBARENA)/selftests/*.bpf.c)
-LIBARENA_OBJECTS = $(notdir $(LIBARENA_SOURCES:.bpf.c=.bpf.o))
-LIBARENA_OBJECTS_ASAN = $(notdir $(LIBARENA_SOURCES:.bpf.c=_asan.bpf.o))
+LIBARENA_OBJECTS = $(addprefix $(OUTPUT)/,$(notdir $(LIBARENA_SOURCES:.bpf.c=.bpf.o)))
+LIBARENA_OBJECTS_ASAN = $(addprefix $(OUTPUT)/,$(notdir $(LIBARENA_SOURCES:.bpf.c=_asan.bpf.o)))
 
 INCLUDES = -I$(LIBARENA)/include -I$(BPFDIR)
 ifneq ($(INCLUDE_DIR),)
@@ -61,32 +65,32 @@ CFLAGS += $(INCLUDES)
 vpath %.bpf.c $(LIBARENA)/src $(LIBARENA)/selftests
 vpath %.c $(LIBARENA)/src $(LIBARENA)/selftests
 
-skeletons: libarena.skel.h libarena_asan.skel.h
+skeletons: $(OUTPUT)/libarena.skel.h $(OUTPUT)/libarena_asan.skel.h
 .PHONY: skeletons
 
-libarena_asan.skel.h: libarena_asan.bpf.o
+$(OUTPUT)/libarena_asan.skel.h: $(OUTPUT)/libarena_asan.bpf.o
 	$(call msg,GEN-SKEL,libarena,$@)
 	$(Q)$(BPFTOOL) gen skeleton $< name "libarena_asan" > $@
 
-libarena.skel.h: libarena.bpf.o
+$(OUTPUT)/libarena.skel.h: $(OUTPUT)/libarena.bpf.o
 	$(call msg,GEN-SKEL,libarena,$@)
 	$(Q)$(BPFTOOL) gen skeleton $< name "libarena" > $@
 
-libarena_asan.bpf.o: $(LIBARENA_OBJECTS_ASAN)
+$(OUTPUT)/libarena_asan.bpf.o: $(LIBARENA_OBJECTS_ASAN)
 	$(call msg,GEN-OBJ,libarena,$@)
 	$(Q)$(BPFTOOL) gen object $@ $^
 
-libarena.bpf.o: $(LIBARENA_OBJECTS)
+$(OUTPUT)/libarena.bpf.o: $(LIBARENA_OBJECTS)
 	$(call msg,GEN-OBJ,libarena,$@)
 	$(Q)$(BPFTOOL) gen object $@ $^
 
-%_asan.bpf.o: %.bpf.c
+$(OUTPUT)/%_asan.bpf.o: %.bpf.c
 	$(call msg,CLNG-BPF,libarena,$@)
 	$(Q)$(CLANG) $(BPF_CFLAGS) $(ASAN_FLAGS) -DBPF_ARENA_ASAN $(BPF_TARGET_ENDIAN) -c $< -o $@
 
-%.bpf.o: %.bpf.c
+$(OUTPUT)/%.bpf.o: %.bpf.c
 	$(call msg,CLNG-BPF,libarena,$@)
 	$(Q)$(CLANG) $(BPF_CFLAGS) $(BPF_TARGET_ENDIAN) -c $< -o $@
 
 clean:
-	$(Q)rm -f *.skel.h *.bpf.o *.linked*.o
+	$(Q)rm -f $(OUTPUT)/*.skel.h $(OUTPUT)/*.bpf.o $(OUTPUT)/*.linked*.o
diff --git a/tools/testing/selftests/bpf/test_kmods/Makefile b/tools/testing/selftests/bpf/test_kmods/Makefile
index 031c7454ce65f..53e47e715ec44 100644
--- a/tools/testing/selftests/bpf/test_kmods/Makefile
+++ b/tools/testing/selftests/bpf/test_kmods/Makefile
@@ -32,14 +32,17 @@ PERMISSIVE := $(filter 0,$(BPF_STRICT_BUILD))
 all:
 ifeq ($(PERMISSIVE),)
 	$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \
+		$(if $(OUTPUT),MO=$(OUTPUT)) \
 		M=$(TEST_KMOD_DIR) modules
 else ifneq ("$(wildcard $(KDIR))", "")
 	$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \
+		$(if $(OUTPUT),MO=$(OUTPUT)) \
 		M=$(TEST_KMOD_DIR) modules
 endif
 
 clean:
 ifneq ("$(wildcard $(KDIR))", "")
 	$(Q)$(MAKE) -C $(KDIR) $(if $(KMOD_O_VALID),O=$(KMOD_O_VALID) KBUILD_OUTPUT=$(KMOD_O_VALID),KBUILD_OUTPUT=) \
+		$(if $(OUTPUT),MO=$(OUTPUT)) \
 		M=$(TEST_KMOD_DIR) clean
 endif

3/2

2026/07/30 04:14

llm

patch-evaluator

Model:

gemini-3.1-pro-preview

Args:

null

Results:

null

Tokens:

							input: 6078
							output: 74
							thoughts: 241

Thoughts:

**WorthFuzzing=false: A Quick Assessment**

Okay, here's the deal: I've got a patch in front of me that touches some Makefiles within the BPF selftest framework. Specifically, it's modifying `tools/testing/selftests/bpf/Makefile`, `tools/testing/selftests/bpf/libarena/Makefile`, and `tools/testing/selftests/bpf/test_kmods/Makefile`. My immediate concern, as always, is whether this warrants fuzzing effort.

From my initial scan, the changes are entirely confined to the build system itself. This patch is just adjusting how the BPF selftests are built, specifically dealing with output directories when `OUTPUT` is defined. There's no modification of actual kernel code, no alterations to drivers, and certainly no architecture-specific changes. This is *purely* build system housekeeping.

Let me just quickly confirm that with a deeper look at the diff. Yep, just Makefile modifications for out-of-tree builds. No C code has been touched, nothing that introduces any new functionality or bug potential at runtime.

So, given the nature of the changes, I can confidently declare this patch as *not* worth fuzzing. I'll flag `WorthFuzzing=false` and submit the results.

4/2

2026/07/30 04:14

tool

set-results

Args:

{
  "EnableConfigs": [],
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies Makefiles for BPF selftests to fix out-of-tree builds (when OUTPUT is set). It does not contain any functional changes to the kernel code, drivers, or architectures.",
  "WorthFuzzing": false
}

Results:

{
  "EnableConfigs": null,
  "FocusSymbols": [],
  "Reasoning": "The patch only modifies Makefiles for BPF selftests to fix out-of-tree builds (when OUTPUT is set). It does not contain any functional changes to the kernel code, drivers, or architectures.",
  "WorthFuzzing": false
}

LLM Calls Summary:
Total Calls	Total Tokens	Avg Tokens	Total Duration (Seconds)	Avg Duration (Seconds)

Tool Calls Summary:
Total Calls	Total Duration (Seconds)	Avg Duration (Seconds)