/* $NetBSD: magic_fuzzer.c,v 1.1.1.1 2022/09/24 20:07:53 christos Exp $ */ /* * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice immediately at the beginning of the file, without modification, * this list of conditions, and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * LLVM fuzzing integration. */ #include "file.h" #ifndef lint #if 0 FILE_RCSID("@(#)$File: magic_fuzzer.c,v 1.1 2017/04/24 19:41:34 christos Exp $") #else __RCSID("$NetBSD: magic_fuzzer.c,v 1.1.1.1 2022/09/24 20:07:53 christos Exp $"); #endif #endif /* lint */ #include "magic.h" #include #include #include int LLVMFuzzerInitialize(int *, char ***); int LLVMFuzzerTestOneInput(const uint8_t *, size_t); static magic_t magic; int LLVMFuzzerInitialize(int *argc, char ***argv) { char dfile[MAXPATHLEN], mfile[MAXPATHLEN]; magic = magic_open(MAGIC_NONE); if (magic == NULL) { warn("magic_open"); return -1; } // Poor man's strlcpy(3), to avoid potentially destructive dirname(3) snprintf(dfile, sizeof(dfile), "%s", (*argv)[0]); snprintf(mfile, sizeof(mfile), "%s/magic", dirname(dfile)); if (magic_load(magic, mfile) == -1) { warnx("magic_load: %s", magic_error(magic)); return -1; } return 0; } int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { if (size == 0) return 0; magic_buffer(magic, data, size); return 0; }