Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 48 insertions, 0 deletions

diff --git a/lib/fuzzing/fuzz_lzxpress_huffman_decompress.c b/lib/fuzzing/fuzz_lzxpress_huffman_decompress.c
new file mode 100644
index 0000000..d475ff6
--- /dev/null
+++ b/lib/fuzzing/fuzz_lzxpress_huffman_decompress.c
@@ -0,0 +1,48 @@
+/*
+   Fuzzing for lzxpress_decompress
+   Copyright (C) Michael Hanselmann 2019
+   Copyright (C) Douglas Bagnall 2022 <dbagnall@samba.org>
+
+   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 3 of the License, or
+   (at your option) any later version.
+
+   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.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "fuzzing/fuzzing.h"
+#include "compression/lzxpress_huffman.h"
+
+int LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+	return 0;
+}
+
+static uint8_t output[1024 * 1024] = {0};
+
+int LLVMFuzzerTestOneInput(const uint8_t *buf, size_t len)
+{
+	size_t target_len;
+	if (len < 4) {
+		return 0;
+	}
+	/*
+	 * An exact target length is required, which we store in the first 24
+	 * bits.
+	 */
+	target_len = MIN(sizeof(output), buf[0] | (buf[1] << 8) | (buf[2] << 16));
+	buf += 3;
+	len -= 3;
+
+	lzxpress_huffman_decompress(buf, len, output, target_len);
+
+	return 0;
+}