fuzzing: Add driver to run fuzz targets on a given list of files

This is enabled if the path to libFuzzer.a is not specified when running
the configure script.
laforge/swu
Tobias Brunner 6 years ago
parent c15dbfaf08
commit be1beea7a4
  1. 12
      configure.ac
  2. 14
      fuzz/Makefile.am
  3. 59
      fuzz/libFuzzerLocal.c

@ -1253,6 +1253,18 @@ if test x$coverage = xtrue; then
CFLAGS="${CFLAGS} -g -O0"
fi
if test x$fuzzing = xtrue; then
if test x$libfuzzer = x; then
AC_MSG_NOTICE([fuzz targets enabled without libFuzzer, using local driver])
CFLAGS="${CFLAGS} -fsanitize=address"
libfuzzer="libFuzzerLocal.a"
else
# required for libFuzzer
FUZZING_LDFLAGS="-stdlib=libc++ -lstdc++"
AC_SUBST(FUZZING_LDFLAGS)
fi
fi
if test x$ruby_gems = xtrue; then
AC_PATH_PROG([GEM], [gem], [], [$PATH:/bin:/usr/bin:/usr/local/bin])
if test x$GEM = x; then

@ -1,12 +1,12 @@
CPPFLAGS = @CPPFLAGS@ \
AM_CPPFLAGS = @CPPFLAGS@ \
-I$(top_srcdir)/src/libstrongswan \
-DPLUGINDIR=\""$(abs_top_builddir)/src/libstrongswan/plugins\"" \
-DPLUGINS="\"${fuzz_plugins}\""
LDFLAGS = @LDFLAGS@ ${libfuzzer} \
fuzz_ldflags = ${libfuzzer} \
$(top_builddir)/src/libstrongswan/.libs/libstrongswan.a \
-Wl,-Bstatic -lgmp -Wl,-Bdynamic \
-stdlib=libc++ -lstdc++
@FUZZING_LDFLAGS@
FUZZ_TARGETS=fuzz_certs
@ -14,5 +14,9 @@ all-local: $(FUZZ_TARGETS)
CLEANFILES=$(FUZZ_TARGETS)
fuzz_certs: fuzz_certs.c
$(CC) $(CPPFLAGS) $(CFLAGS) -o $@ $< $(LDFLAGS)
fuzz_certs: fuzz_certs.c ${libfuzzer}
$(CC) $(AM_CPPFLAGS) $(CFLAGS) -o $@ $< $(fuzz_ldflags)
noinst_LIBRARIES = libFuzzerLocal.a
libFuzzerLocal_a_SOURCES = libFuzzerLocal.c
libFuzzerLocal_a_LIBADD = $(top_builddir)/src/libstrongswan/libstrongswan.la

@ -0,0 +1,59 @@
/*
* Copyright (C) 2017 Tobias Brunner
* HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <library.h>
extern int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size);
__attribute__((weak)) extern int LLVMFuzzerInitialize(int *argc, char ***argv);
/**
* This is a simple driver for the fuzz targets to verify test inputs outside
* of OSS-Fuzz.
*
* Failures will usually cause crashes.
*/
int main(int argc, char **argv)
{
chunk_t *data;
int i, res = 0;
fprintf(stderr, "%s: running %d inputs\n", argv[0], argc - 1);
if (LLVMFuzzerInitialize)
{
LLVMFuzzerInitialize(&argc, &argv);
}
for (i = 1; i < argc; i++)
{
fprintf(stderr, "running: %s\n", argv[i]);
data = chunk_map(argv[i], FALSE);
if (!data)
{
fprintf(stderr, "opening %s failed: %s\n", argv[i], strerror(errno));
return 1;
}
res = LLVMFuzzerTestOneInput(data->ptr, data->len);
fprintf(stderr, "done: %s: (%zd bytes)\n", argv[i], data->len);
chunk_unmap(data);
if (res)
{
break;
}
}
fprintf(stderr, "%s: completed %d inputs\n", argv[0], i-1);
return res;
}
Loading…
Cancel
Save