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fuzz: some cleanups (#3143)

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* fuzz: some cleanups

Signed-off-by: Miek Gieben <miek@miek.nl>

* smaller

Signed-off-by: Miek Gieben <miek@miek.nl>

* documentation

Signed-off-by: Miek Gieben <miek@miek.nl>

* comments

Signed-off-by: Miek Gieben <miek@miek.nl>
This commit is contained in:
Miek Gieben
2019-08-19 08:06:25 +00:00
committed by GitHub
parent 6fa61119bd
commit 6f028d0427
3 changed files with 24 additions and 23 deletions
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17
Makefile
View File

@@ -50,18 +50,13 @@ ifeq ($(TEST_TYPE),fuzzit)
export GO111MODULE=off; \
go get -u github.com/dvyukov/go-fuzz/go-fuzz-build; \
go get -u -v .; \
cd ../../go-acme/lego; \
git checkout v2.5.0; \
cd ../../go-acme/lego && git checkout v2.5.0; \
cd ../../coredns/coredns; \
LIBFUZZER=YES make -f Makefile.fuzz cache chaos file rewrite whoami corefile; \
wget -O fuzzit https://github.com/fuzzitdev/fuzzit/releases/download/v2.4.27/fuzzit_Linux_x86_64; \
chmod a+x fuzzit; \
./fuzzit create job --type $(FUZZIT_TYPE) coredns/cache ./cache; \
./fuzzit create job --type $(FUZZIT_TYPE) coredns/chaos ./chaos; \
./fuzzit create job --type $(FUZZIT_TYPE) coredns/file ./file; \
./fuzzit create job --type $(FUZZIT_TYPE) coredns/rewrite ./rewrite; \
./fuzzit create job --type $(FUZZIT_TYPE) coredns/whoami ./whoami; \
./fuzzit create job --type $(FUZZIT_TYPE) coredns/corefile ./corefile; \
LIBFUZZER=YES $(MAKE) -f Makefile.fuzz all; \
$(MAKE) -sf Makefile.fuzz fuzzit; \
for i in `$(MAKE) -sf Makefile.fuzz echo`; do echo $$i; \
./fuzzit create job --type $(FUZZIT_TYPE) coredns/$$i ./$$i; \
done; \
fi;
endif

18
Makefile.fuzz
View File

@@ -1,5 +1,7 @@
# Makefile for fuzzing
#
# With https://app.fuzzit.dev/ we are continuously fuzzing CoreDNS.
#
# Use go-fuzz and needs the tools installed. For each fuzz.go in a plugin's directory
# you can start the fuzzing with: make -f Makefile.fuzz <plugin>
# e.g.
@@ -9,11 +11,13 @@
# Each plugin that wants to join the fuzzing fray only needs to add a fuzz.go that calls
# the plugins's ServeDNS and used the plugin/pkg/fuzz for the Do function.
#
# Installing go-fuzz
#$ go get github.com/dvyukov/go-fuzz/go-fuzz
#$ go get github.com/dvyukov/go-fuzz/go-fuzz-build
# Installing go-fuzz is very tricky because it does not support Go modules, see the `Makefile`
# for the current trickery. The following may do the trick:
#
# GO111MODULE=off go get github.com/dvyukov/go-fuzz/go-fuzz-build
REPO:="github.com/coredns/coredns"
FUZZIT:=v2.4.28
# set LIBFUZZER=YES to build libfuzzer compatible targets
FUZZ:=$(dir $(wildcard plugin/*/fuzz.go)) # plugin/cache/
@@ -22,7 +26,9 @@ PLUGINS:=$(foreach f,$(PLUGINS),$(subst /, ,$(f))) # > cache
.PHONY: echo
echo:
@echo fuzz targets: $(PLUGINS)
@echo $(PLUGINS) corefile
all: $(PLUGINS) corefile
.PHONY: $(PLUGINS)
$(PLUGINS): echo
@@ -34,7 +40,6 @@ else
go-fuzz -bin=./$(@)-fuzz.zip -workdir=fuzz/$(@)
endif
.PHONY: corefile
corefile:
ifeq ($(LIBFUZZER), YES)
@@ -45,7 +50,8 @@ else
go-fuzz -bin=./test-fuzz.zip -workdir=fuzz/$(@)
endif
fuzzit:
wget -O fuzzit https://github.com/fuzzitdev/fuzzit/releases/download/$(FUZZIT)/fuzzit_Linux_x86_64 && chmod +x fuzzit
.PHONY: clean
clean:

2
plugin/pkg/fuzz/do.go
View File

@@ -10,7 +10,7 @@ import (
"github.com/miekg/dns"
)
// Do will fuzz p - used by gofuzz. See Maefile.fuzz for comments and context.
// Do will fuzz p - used by gofuzz. See Makefile.fuzz for comments and context.
func Do(p plugin.Handler, data []byte) int {
ctx := context.TODO()
ret := 1