diff options
Diffstat (limited to 'lib/fuzzstub')
| -rw-r--r-- | lib/fuzzstub/Makefile.in | 176 | ||||
| -rw-r--r-- | lib/fuzzstub/fuzzstub.c | 133 |
2 files changed, 309 insertions, 0 deletions
diff --git a/lib/fuzzstub/Makefile.in b/lib/fuzzstub/Makefile.in new file mode 100644 index 0000000..8c472b5 --- /dev/null +++ b/lib/fuzzstub/Makefile.in @@ -0,0 +1,176 @@ +# +# SPDX-License-Identifier: ISC +# +# Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws> +# +# Permission to use, copy, modify, and distribute this software for any +# purpose with or without fee is hereby granted, provided that the above +# copyright notice and this permission notice appear in all copies. +# +# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +# +# @configure_input@ +# + +#### Start of system configuration section. #### + +srcdir = @srcdir@ +abs_srcdir = @abs_srcdir@ +top_srcdir = @top_srcdir@ +abs_top_srcdir = @abs_top_srcdir@ +top_builddir = @top_builddir@ +abs_top_builddir = @abs_top_builddir@ +devdir = @devdir@ +scriptdir = $(top_srcdir)/scripts +incdir = $(top_srcdir)/include + +# Compiler & tools to use +CC = @CC@ +LIBTOOL = @LIBTOOL@ + +# C preprocessor flags +CPPFLAGS = -I$(incdir) -I$(top_builddir) -I$(srcdir) -I$(top_srcdir) @CPPFLAGS@ + +# Usually -O and/or -g +CFLAGS = @CFLAGS@ + +# Flags to pass to the link stage +LDFLAGS = @LDFLAGS@ + +# Flags to pass to libtool +LTFLAGS = @LT_STATIC@ + +# Libraries +LT_LIBS = +LIBS = $(LT_LIBS) + +# Address sanitizer flags +ASAN_CFLAGS = @ASAN_CFLAGS@ +ASAN_LDFLAGS = @ASAN_LDFLAGS@ + +# PIE flags +PIE_CFLAGS = @PIE_CFLAGS@ +PIE_LDFLAGS = @PIE_LDFLAGS@ + +# Stack smashing protection flags +HARDENING_CFLAGS = @HARDENING_CFLAGS@ +HARDENING_LDFLAGS = @HARDENING_LDFLAGS@ + +# cppcheck options, usually set in the top-level Makefile +CPPCHECK_OPTS = -q --enable=warning,performance,portability --suppress=constStatement --suppress=compareBoolExpressionWithInt --error-exitcode=1 --inline-suppr -Dva_copy=va_copy -U__cplusplus -UQUAD_MAX -UQUAD_MIN -UUQUAD_MAX -U_POSIX_HOST_NAME_MAX -U_POSIX_PATH_MAX -U__NBBY -DNSIG=64 + +# splint options, usually set in the top-level Makefile +SPLINT_OPTS = -D__restrict= -checks + +# PVS-studio options +PVS_CFG = $(top_srcdir)/PVS-Studio.cfg +PVS_IGNORE = 'V707,V011,V002,V536' +PVS_LOG_OPTS = -a 'GA:1,2' -e -t errorfile -d $(PVS_IGNORE) + +# Set to non-empty for development mode +DEVEL = @DEVEL@ + +#### End of system configuration section. #### + +SHELL = @SHELL@ + +LIBFUZZSTUB_OBJS = fuzzstub.lo + +IOBJS = $(LIBFUZZSTUB_OBJS:.lo=.i) + +POBJS = $(IOBJS:.i=.plog) + +all: libsudo_fuzzstub.la + +depend: + $(scriptdir)/mkdep.pl --srcdir=$(abs_top_srcdir) \ + --builddir=$(abs_top_builddir) lib/fuzzstub/Makefile.in + cd $(top_builddir) && ./config.status --file lib/fuzzstub/Makefile + +Makefile: $(srcdir)/Makefile.in + cd $(top_builddir) && ./config.status --file lib/fuzzstub/Makefile + +.SUFFIXES: .c .h .i .lo .plog + +.c.lo: + $(LIBTOOL) $(LTFLAGS) --mode=compile $(CC) -c -o $@ $(CPPFLAGS) $(CFLAGS) $(ASAN_CFLAGS) $(PIE_CFLAGS) $(HARDENING_CFLAGS) $< + +.c.i: + $(CC) -E -o $@ $(CPPFLAGS) $< + +.i.plog: + ifile=$<; rm -f $@; pvs-studio --cfg $(PVS_CFG) --sourcetree-root $(top_srcdir) --skip-cl-exe yes --source-file $${ifile%i}c --i-file $< --output-file $@ + +libsudo_fuzzstub.la: $(LIBFUZZSTUB_OBJS) + $(LIBTOOL) $(LTFLAGS) --mode=link $(CC) -o $@ $(LIBFUZZSTUB_OBJS) $(LT_LIBS) + +pre-install: + +install: + +install-binaries: + +install-includes: + +install-doc: + +install-plugin: + +install-fuzzer: + +uninstall: + +splint: + splint $(SPLINT_OPTS) -I$(incdir) -I$(top_builddir) -I$(top_srcdir) $(srcdir)/*.c + +cppcheck: + cppcheck $(CPPCHECK_OPTS) -I$(incdir) -I$(top_builddir) -I$(top_srcdir) $(srcdir)/*.c + +pvs-log-files: $(POBJS) + +pvs-studio: $(POBJS) + plog-converter $(PVS_LOG_OPTS) $(POBJS) + +fuzz: + +check-fuzzer: + +check: check-fuzzer + +check-verbose: check + +clean: + -$(LIBTOOL) $(LTFLAGS) --mode=clean rm -f *.lo *.o *.la + -rm -f *.i *.plog stamp-* core *.core core.* + +mostlyclean: clean + +distclean: clean + -rm -rf Makefile .libs + +clobber: distclean + +realclean: distclean + rm -f TAGS tags + +cleandir: realclean + +.PHONY: clean mostlyclean distclean cleandir clobber realclean + +# Autogenerated dependencies, do not modify +fuzzstub.lo: $(srcdir)/fuzzstub.c $(incdir)/compat/stdbool.h \ + $(incdir)/sudo_compat.h $(incdir)/sudo_util.h \ + $(top_builddir)/config.h + $(LIBTOOL) $(LTFLAGS) --mode=compile $(CC) -c -o $@ $(CPPFLAGS) $(CFLAGS) $(ASAN_CFLAGS) $(PIE_CFLAGS) $(HARDENING_CFLAGS) $(srcdir)/fuzzstub.c +fuzzstub.i: $(srcdir)/fuzzstub.c $(incdir)/compat/stdbool.h \ + $(incdir)/sudo_compat.h $(incdir)/sudo_util.h \ + $(top_builddir)/config.h + $(CC) -E -o $@ $(CPPFLAGS) $< +fuzzstub.plog: fuzzstub.i + rm -f $@; pvs-studio --cfg $(PVS_CFG) --sourcetree-root $(top_srcdir) --skip-cl-exe yes --source-file $(srcdir)/fuzzstub.c --i-file $< --output-file $@ diff --git a/lib/fuzzstub/fuzzstub.c b/lib/fuzzstub/fuzzstub.c new file mode 100644 index 0000000..bc28cad --- /dev/null +++ b/lib/fuzzstub/fuzzstub.c @@ -0,0 +1,133 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2021 Todd C. Miller <Todd.Miller@sudo.ws> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#include <config.h> + +#include <sys/stat.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <limits.h> +#include <fcntl.h> +#include <time.h> +#include <unistd.h> +#if defined(HAVE_STDINT_H) +# include <stdint.h> +#elif defined(HAVE_INTTYPES_H) +# include <inttypes.h> +#endif + +#include "sudo_compat.h" +#include "sudo_util.h" + +int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size); + +sudo_dso_public int main(int argc, char *argv[]); + +/* + * Simple driver for fuzzers built for LLVM libfuzzer. + * This stub library allows fuzz targets to be built and run without + * libfuzzer. No actual fuzzing will occur but the provided inputs + * will be tested. + */ +int +main(int argc, char *argv[]) +{ + struct timespec start_time, stop_time; + size_t filesize, bufsize = 0; + ssize_t nread; + struct stat sb; + uint8_t *buf = NULL; + int fd, i, errors = 0; + int verbose = 0; + long ms; + + /* Test provided input files. */ + for (i = 1; i < argc; i++) { + const char *arg = argv[i]; + if (*arg == '-') { + if (strncmp(arg, "-verbosity=", sizeof("-verbosity=") - 1) == 0) { + verbose = atoi(arg + sizeof("-verbosity=") - 1); + } + continue; + } + fd = open(arg, O_RDONLY); + if (fd == -1 || fstat(fd, &sb) != 0) { + fprintf(stderr, "open %s: %s\n", arg, strerror(errno)); + if (fd != -1) + close(fd); + errors++; + continue; + } +#ifndef __LP64__ + if (sizeof(sb.st_size) > sizeof(size_t) && sb.st_size > SSIZE_MAX) { + errno = E2BIG; + fprintf(stderr, "%s: %s\n", arg, strerror(errno)); + close(fd); + errors++; + continue; + } +#endif + filesize = sb.st_size; + if (bufsize < filesize) { + void *tmp = realloc(buf, filesize); + if (tmp == NULL) { + fprintf(stderr, "realloc: %s\n", strerror(errno)); + close(fd); + errors++; + continue; + } + buf = tmp; + bufsize = filesize; + } + nread = read(fd, buf, filesize); + if ((size_t)nread != filesize) { + if (nread == -1) + fprintf(stderr, "read %s: %s\n", arg, strerror(errno)); + else + fprintf(stderr, "read %s: short read\n", arg); + close(fd); + errors++; + continue; + } + close(fd); + + /* NOTE: doesn't support LLVMFuzzerInitialize() (but we don't use it) */ + if (verbose > 0) { + fprintf(stderr, "Running: %s\n", arg); + sudo_gettime_mono(&start_time); + } + LLVMFuzzerTestOneInput(buf, nread); + if (verbose > 0) { + sudo_gettime_mono(&stop_time); + sudo_timespecsub(&stop_time, &start_time, &stop_time); + ms = (stop_time.tv_sec * 1000) + (stop_time.tv_nsec / 1000000); + fprintf(stderr, "Executed %s in %ld ms\n", arg, ms); + } + } + free(buf); + + return errors; +} |