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-rw-r--r--test/cmark-fuzz.c30
1 files changed, 17 insertions, 13 deletions
diff --git a/test/cmark-fuzz.c b/test/cmark-fuzz.c
index f4f082a..9bdd3a5 100644
--- a/test/cmark-fuzz.c
+++ b/test/cmark-fuzz.c
@@ -3,24 +3,28 @@
#include "cmark.h"
int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
- int options = 0;
- if (size >= sizeof(options)) {
- /* First 4 bytes of input are treated as options */
- int options = *(const int *)data;
+ struct __attribute__((packed)) {
+ int options;
+ int width;
+ } fuzz_config;
+
+ if (size >= sizeof(fuzz_config)) {
+ /* The beginning of `data` is treated as fuzzer configuration */
+ memcpy(&fuzz_config, data, sizeof(fuzz_config));
/* Mask off valid option bits */
- options = options & (CMARK_OPT_SOURCEPOS | CMARK_OPT_HARDBREAKS | CMARK_OPT_SAFE | CMARK_OPT_NOBREAKS | CMARK_OPT_NORMALIZE | CMARK_OPT_VALIDATE_UTF8 | CMARK_OPT_SMART);
+ fuzz_config.options &= (CMARK_OPT_SOURCEPOS | CMARK_OPT_HARDBREAKS | CMARK_OPT_SAFE | CMARK_OPT_NOBREAKS | CMARK_OPT_NORMALIZE | CMARK_OPT_VALIDATE_UTF8 | CMARK_OPT_SMART);
/* Remainder of input is the markdown */
- const char *markdown = (const char *)(data + sizeof(options));
- const size_t markdown_size = size - sizeof(options);
- cmark_node *doc = cmark_parse_document(markdown, markdown_size, options);
+ const char *markdown = (const char *)(data + sizeof(fuzz_config));
+ const size_t markdown_size = size - sizeof(fuzz_config);
+ cmark_node *doc = cmark_parse_document(markdown, markdown_size, fuzz_config.options);
- free(cmark_render_commonmark(doc, options, 80));
- free(cmark_render_html(doc, options));
- free(cmark_render_latex(doc, options, 80));
- free(cmark_render_man(doc, options, 80));
- free(cmark_render_xml(doc, options));
+ free(cmark_render_commonmark(doc, fuzz_config.options, fuzz_config.width));
+ free(cmark_render_html(doc, fuzz_config.options));
+ free(cmark_render_latex(doc, fuzz_config.options, fuzz_config.width));
+ free(cmark_render_man(doc, fuzz_config.options, fuzz_config.width));
+ free(cmark_render_xml(doc, fuzz_config.options));
cmark_node_free(doc);
}