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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-08-24 21:26:44 +0200
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-08-24 21:27:13 +0200
commit2d43d376d38ebf91d0ef6b8711bdc134aa1abdd6 (patch)
treef18c25ca41e210ff34a04a67a1f25970d50a7f11 /tar
parente31c0fcd809a649b70e6bab08a8b89f9ced07510 (diff)
Add minimal test program for fuzzing the tar parser
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'tar')
-rw-r--r--tar/Makemodule.am4
-rw-r--r--tar/tar_fuzz.c52
2 files changed, 56 insertions, 0 deletions
diff --git a/tar/Makemodule.am b/tar/Makemodule.am
index b8674c2..551f4cd 100644
--- a/tar/Makemodule.am
+++ b/tar/Makemodule.am
@@ -8,4 +8,8 @@ tar2sqfs_CFLAGS = $(AM_CFLAGS) $(PTHREAD_CFLAGS)
tar2sqfs_LDADD += $(XZ_LIBS) $(ZLIB_LIBS) $(LZO_LIBS) $(LZ4_LIBS) $(ZSTD_LIBS)
tar2sqfs_LDADD += $(PTHREAD_LIBS)
+tar_fuzz_SOURCES = tar/tar_fuzz.c
+tar_fuzz_LDADD = libtar.a libutil.a
+
bin_PROGRAMS += sqfs2tar tar2sqfs
+noinst_PROGRAMS += tar_fuzz
diff --git a/tar/tar_fuzz.c b/tar/tar_fuzz.c
new file mode 100644
index 0000000..4dc20f5
--- /dev/null
+++ b/tar/tar_fuzz.c
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * tar_fuzz.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "config.h"
+
+#include "util.h"
+#include "tar.h"
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+
+int main(int argc, char **argv)
+{
+ tar_header_decoded_t hdr;
+ int fd, ret;
+
+ if (argc != 2) {
+ fputs("usage: tar_fuzz <tarball>\n", stderr);
+ return EXIT_FAILURE;
+ }
+
+ fd = open(argv[1], O_RDONLY);
+ if (fd < 0) {
+ perror(argv[1]);
+ return EXIT_FAILURE;
+ }
+
+ for (;;) {
+ ret = read_header(fd, &hdr);
+ if (ret > 0)
+ break;
+ if (ret < 0)
+ goto fail;
+
+ ret = lseek(fd, hdr.sb.st_size, SEEK_CUR);
+
+ clear_header(&hdr);
+ if (ret)
+ goto fail;
+ }
+
+ close(fd);
+ return EXIT_SUCCESS;
+fail:
+ close(fd);
+ return EXIT_FAILURE;
+}