--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/thirdparty/zint/backend/tests/fuzz/fuzz_data.c	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,87 @@
+/*  fuzz_data.c - fuzzer for libzint (DATA_MODE, all symbologies except GS1_128, DBAR_EXP/STK & composites) */
+/*
+    libzint - the open source barcode library
+    Copyright (C) 2024 Robin Stuart <rstuart114@gmail.com>
+
+    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, 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.
+    3. Neither the name of the project nor the names of its contributors
+       may be used to endorse or promote products derived from this software
+       without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
+ */
+/* SPDX-License-Identifier: BSD-3-Clause */
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#if 0
+#define Z_FUZZ_DEBUG                 /* Set `symbol->debug` flag */
+#define Z_FUZZ_SET_OUTPUT_OPTIONS    /* Set `symbol->output_options` */
+#endif
+#include "fuzz.h"
+
+int LLVMFuzzerTestOneInput(const unsigned char *data, size_t size) {
+    struct zint_symbol *symbol;
+    int idx;
+
+    /* Ignore empty or very large input */
+    if (size < 1 || size > 10000) {
+        return 0;
+    }
+
+    symbol = ZBarcode_Create();
+    assert(symbol);
+
+    for (idx = 0; idx < ZARRAY_SIZE(settings); idx++) {
+        const unsigned char *input;
+        int length;
+        int ret;
+
+        if (!ZBarcode_ValidID(idx)) {
+            continue;
+        }
+        if (idx == BARCODE_GS1_128 || idx == BARCODE_DBAR_EXP || idx == BARCODE_DBAR_EXPSTK
+                || (ZBarcode_Cap(idx, ZINT_CAP_COMPOSITE) & ZINT_CAP_COMPOSITE)) {
+            continue;
+        }
+
+        input = data;
+        length = set_symbol(symbol, idx, 1 /*chk_sane*/, 0 /*no_eci*/, &input, size);
+        if (!length) {
+            continue;
+        }
+
+        ret = ZBarcode_Encode(symbol, input, length);
+        assert(ret != ZINT_ERROR_ENCODING_PROBLEM);
+    }
+
+    ZBarcode_Delete(symbol);
+
+    return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+/* vim: set ts=4 sw=4 et : */