initial commit for enhancing fuzz tests

Makefile

@@ -97,7 +97,7 @@ _test_plugins_fail/%.so: _test_plugins_fail/%.go
 
 .PHONY: fuzz
 fuzz: ## run all fuzz tests
-	for p in $(PACKAGES); do go test -run=NONE -fuzz=Fuzz -fuzztime 30s $$p; done
+	$(MAKE) -C fuzz $(MAKECMDGOALS)
 
 .PHONY: lint
 lint: build staticcheck ## run all linters

fuzz/Dockerfile

@@ -0,0 +1,21 @@
+FROM amazonlinux:2023
+
+WORKDIR /workspace
+
+ENV PATH="/root/go/bin:$PATH"
+
+COPY . .
+
+RUN dnf install -q -y make clang golang && \
+    update-alternatives --install /usr/bin/cc cc /usr/bin/clang 20 && \
+    go install github.com/mdempsky/go114-fuzz-build@latest && \
+    go mod init fuzz && \
+    go mod tidy && \
+    make -s -j $(nproc) && \
+    dnf autoremove -q -y && \
+    dnf clean all -q && \
+    go clean -cache -testcache -modcache -fuzzcache
+
+ENTRYPOINT [ "/usr/bin/make", "fuzz" ]
+
+CMD ["FUZZ_TARGETS=FuzzParseEskip"]

fuzz/Makefile

@@ -0,0 +1,64 @@
+MKDIR			= mkdir -p
+GO_FUZZ_BUILD		?= go114-fuzz-build
+
+PREFIX			?= $(CURDIR)
+ARTIFACTS_PATH		= $(PREFIX)/artifacts
+DICTIONARY_PATH		= $(PREFIX)/dictionaries
+CORPUS_PATH		= $(PREFIX)/corpus
+FUZZ_TARGETS_PATH	= $(PREFIX)/fuzz_targets
+
+FUZZ_TARGETS 		?= FuzzParseCIDRs FuzzParseEskip FuzzParseFilters \
+				FuzzParseIngressV1JSON FuzzParseIPCIDRs \
+				FuzzParseJwt FuzzParsePredicates \
+				FuzzParseRouteGroupsJSON FuzzServer
+
+FUZZ_SANITIZER		?= address
+FUZZ_FORKS		?= 2
+FUZZ_MAX_TOTAL_TIME	?= 600
+FUZZ_RUNS		?= -1
+FUZZER_ARGS		?= -artifact_prefix=$(ARTIFACTS_PATH) \
+				-rss_limit_mb=2560 -timeout=25 \
+				-max_total_time=$(FUZZ_MAX_TOTAL_TIME) \
+				-len_control=0 -detect_leaks=0 -max_len=4096 \
+				-fork=$(FUZZ_FORKS) -runs=$(FUZZ_RUNS)
+
+ifeq ($(FUZZ_SANITIZER), address)
+	FUZZ_BUILD_ARGS = -fsanitize=fuzzer -fsanitize=address -fsanitize-address-use-after-scope
+else ifeq ($(FUZZ_SANITIZER), undefined)
+	FUZZ_BUILD_ARGS = -fsanitize=fuzzer -fsanitize=array-bounds,bool,builtin,enum,float-divide-by-zero,function,integer-divide-by-zero,null,object-size,return,returns-nonnull-attribute,shift,signed-integer-overflow,unsigned-integer-overflow,unreachable,vla-bound,vptr -fno-sanitize-recover=array-bounds,bool,builtin,enum,float-divide-by-zero,function,integer-divide-by-zero,null,object-size,return,returns-nonnull-attribute,shift,signed-integer-overflow,unreachable,vla-bound,vptr
+else ifeq ($(FUZZ_SANITIZER), none)
+	FUZZ_BUILD_ARGS = -fsanitize=fuzzer
+else
+$(error $(FUZZ_SANITIZER) is invalid sanitizer, available options are address, undefined, none)
+endif
+
+export ASAN_OPTIONS	= alloc_dealloc_mismatch=0:allocator_may_return_null=1:allocator_release_to_os_interval_ms=500:check_malloc_usable_size=0:detect_container_overflow=1:detect_odr_violation=0:detect_leaks=1:detect_stack_use_after_return=1:fast_unwind_on_fatal=0:handle_abort=1:handle_segv=1:handle_sigill=1:max_uar_stack_size_log=16:print_scariness=1:quarantine_size_mb=10:strict_memcmp=1:symbolize=1:use_sigaltstack=1:dedup_token_length=3
+export UBSAN_OPTIONS	= print_stacktrace=1:print_summary=1:silence_unsigned_overflow=1:symbolize=1:dedup_token_length=3
+
+.PHONY: help all fuzz clean
+default: all
+
+help: ## display this help
+	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m<target>\033[0m\n"} /^[a-zA-Z_0-9-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)
+
+all: $(FUZZ_TARGETS:=.out) ## build all fuzz binaries
+
+%.a:
+	$(GO_FUZZ_BUILD) -func $(@:.a=) -o $@ $(FUZZ_TARGETS_PATH)
+
+gosigfuzz/gosigfuzz.o:
+	$(CC) -c $(@:.o=.c) -o $@
+
+%.out: %.a gosigfuzz/gosigfuzz.o
+	$(CC) $(FUZZ_BUILD_ARGS) -lresolv $^ -o $@
+
+fuzz: $(FUZZ_TARGETS:=.out) ## run all fuzz tests
+	for TARGET in $(FUZZ_TARGETS); do \
+		$(MKDIR) $(CORPUS_PATH)/$$TARGET $(ARTIFACTS_PATH); \
+		ARGS="$(FUZZER_ARGS)"; \
+		[ -f "$(DICTIONARY_PATH)/$$TARGET.dict" ] && ARGS="$$ARGS -dict=$(DICTIONARY_PATH)/$$TARGET.dict"; \
+		$(PREFIX)/$$TARGET.out $$ARGS $(CORPUS_PATH)/$$TARGET; \
+	done
+
+clean: ## clean temporary files and directories
+	$(RM) $(PREFIX)/*.out $(PREFIX)/*.a $(PREFIX)/*.h $(PREFIX)/main.*.go gosigfuzz/gosigfuzz.o

fuzz/README.md

@@ -0,0 +1,3 @@
+# Fuzzing
+
+This directory contains a set of dictionaries and fuzz targets along with other tooling to fuzz skipper.

fuzz/dictionaries/FuzzParseEskip.dict

@@ -0,0 +1,188 @@
+"&&"
+"*"
+"->"
+")"
+":"
+","
+"("
+";"
+"<shunt>"
+"<loopback>"
+"<dynamic>"
+"<"
+">"
+"backendIsProxy"
+"modRequestHeader"
+"setRequestHeader"
+"appendRequestHeader"
+"dropRequestHeader"
+"modResponseHeader"
+"setResponseHeader"
+"appendResponseHeader"
+"dropResponseHeader"
+"setContextRequestHeader"
+"appendContextRequestHeader"
+"setContextResponseHeader"
+"appendContextResponseHeader"
+"copyRequestHeader"
+"copyResponseHeader"
+"modPath"
+"setPath"
+"redirectTo"
+"redirectToLower"
+"static"
+"stripQuery"
+"preserveHost"
+"status"
+"compress"
+"decompress"
+"setQuery"
+"dropQuery"
+"inlineContent"
+"inlineContentIfStatus"
+"flowId"
+"xforward"
+"xforwardFirst"
+"randomContent"
+"repeatContent"
+"repeatContentHex"
+"wrapContent"
+"wrapContentHex"
+"backendTimeout"
+"readTimeout"
+"writeTimeout"
+"blockContent"
+"blockContentHex"
+"latency"
+"bandwidth"
+"chunks"
+"backendLatency"
+"backendBandwidth"
+"backendChunks"
+"absorb"
+"absorbSilent"
+"uniformRequestLatency"
+"uniformResponseLatency"
+"normalRequestLatency"
+"normalResponseLatency"
+"histogramRequestLatency"
+"histogramResponseLatency"
+"logHeader"
+"tee"
+"teenf"
+"teeLoopback"
+"sed"
+"sedDelim"
+"sedRequest"
+"sedRequestDelim"
+"basicAuth"
+"webhook"
+"oauthTokeninfoAnyScope"
+"oauthTokeninfoAllScope"
+"oauthTokeninfoAnyKV"
+"oauthTokeninfoAllKV"
+"oauthTokenintrospectionAnyClaims"
+"oauthTokenintrospectionAllClaims"
+"oauthTokenintrospectionAnyKV"
+"oauthTokenintrospectionAllKV"
+"secureOauthTokenintrospectionAnyClaims"
+"secureOauthTokenintrospectionAllClaims"
+"secureOauthTokenintrospectionAnyKV"
+"secureOauthTokenintrospectionAllKV"
+"forwardToken"
+"forwardTokenField"
+"oauthGrant"
+"grantCallback"
+"grantLogout"
+"grantClaimsQuery"
+"jwtValidation"
+"oauthOidcUserInfo"
+"oauthOidcAnyClaims"
+"oauthOidcAllClaims"
+"oidcClaimsQuery"
+"dropRequestCookie"
+"dropResponseCookie"
+"requestCookie"
+"responseCookie"
+"jsCookie"
+"consecutiveBreaker"
+"rateBreaker"
+"disableBreaker"
+"admissionControl"
+"clientRatelimit"
+"ratelimit"
+"clusterClientRatelimit"
+"clusterRatelimit"
+"clusterLeakyBucketRatelimit"
+"backendRatelimit"
+"ratelimitFailClosed"
+"lua"
+"corsOrigin"
+"headerToQuery"
+"queryToHeader"
+"disableAccessLog"
+"enableAccessLog"
+"auditLog"
+"unverifiedAuditLog"
+"setDynamicBackendHostFromHeader"
+"setDynamicBackendSchemeFromHeader"
+"setDynamicBackendUrlFromHeader"
+"setDynamicBackendHost"
+"setDynamicBackendScheme"
+"setDynamicBackendUrl"
+"apiUsageMonitoring"
+"fifo"
+"lifo"
+"lifoGroup"
+"rfcPath"
+"rfcHost"
+"bearerinjector"
+"tracingBaggageToTag"
+"stateBagToTag"
+"tracingTag"
+"tracingTagFromResponse"
+"tracingSpanName"
+"originMarker"
+"fadeIn"
+"endpointCreated"
+"consistentHashKey"
+"consistentHashBalanceFactor"
+"opaAuthorizeRequest"
+"opaServeResponse"
+"healthcheck"
+"setFastCgiFilename"
+"disableRatelimit"
+"unknownRatelimit"
+"Path"
+"PathSubtree"
+"PathRegexp"
+"Host"
+"HostAny"
+"ForwardedHost"
+"ForwardedProtocol"
+"Weight"
+"True"
+"False"
+"Shutdown"
+"Method"
+"Methods"
+"Header"
+"HeaderRegexp"
+"Cookie"
+"JWTPayloadAnyKV"
+"JWTPayloadAllKV"
+"JWTPayloadAnyKVRegexp"
+"JWTPayloadAllKVRegexp"
+"HeaderSHA256"
+"After"
+"Before"
+"Between"
+"Cron"
+"QueryParam"
+"Source"
+"SourceFromLast"
+"ClientIP"
+"Tee"
+"Traffic"
+"TrafficSegment"
+"ContentLengthBetween"