fuzzing: add fuzzing targets

Signed-off-by: Arjun <pkillarjun@protonmail.com>
Reviewed-by: Andrew Clayton <a.clayton@nginx.com>
Signed-off-by: Andrew Clayton <a.clayton@nginx.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/fuzzing/nxt_http_h1p_fuzz.c b/fuzzing/nxt_http_h1p_fuzz.c
new file mode 100644
index 00000000..471e87a4
--- /dev/null
+++ b/fuzzing/nxt_http_h1p_fuzz.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+/* DO NOT TRY THIS AT HOME! */
+#include "nxt_h1proto.c"
+
+
+#define KMININPUTLENGTH 2
+#define KMAXINPUTLENGTH 1024
+
+
+extern int LLVMFuzzerInitialize(int *argc, char ***argv);
+extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+
+extern char  **environ;
+
+
+int
+LLVMFuzzerInitialize(int *argc, char ***argv)
+{
+    nxt_int_t  ret;
+
+    if (nxt_lib_start("fuzzing", NULL, &environ) != NXT_OK) {
+        return NXT_ERROR;
+    }
+
+    ret = nxt_http_fields_hash(&nxt_h1p_fields_hash,
+                               nxt_h1p_fields, nxt_nitems(nxt_h1p_fields));
+    if (ret != NXT_OK) {
+        return NXT_ERROR;
+    }
+
+    return 0;
+}
+
+
+int
+LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
+{
+    nxt_mp_t                  *mp;
+    nxt_buf_mem_t             buf;
+    nxt_http_request_t        *r_h1p;
+    nxt_http_request_parse_t  rp;
+
+    if (size < KMININPUTLENGTH || size > KMAXINPUTLENGTH) {
+        return 0;
+    }
+
+    mp = nxt_mp_create(1024, 128, 256, 32);
+    if (mp == NULL) {
+        return 0;
+    }
+
+    nxt_memzero(&rp, sizeof(nxt_http_request_parse_t));
+    if (nxt_http_parse_request_init(&rp, mp) != NXT_OK) {
+        goto failed;
+    }
+
+    buf.start = (u_char *)data;
+    buf.end = (u_char *)data + size;
+    buf.pos = buf.start;
+    buf.free = buf.end;
+
+    if (nxt_http_parse_request(&rp, &buf) != NXT_DONE) {
+        goto failed;
+    }
+
+    r_h1p = nxt_mp_zget(mp, sizeof(nxt_http_request_t));
+
+    if (r_h1p == NULL) {
+        goto failed;
+    }
+
+    nxt_http_fields_process(rp.fields, &nxt_h1p_fields_hash, r_h1p);
+
+failed:
+
+    nxt_mp_destroy(mp);
+
+    return 0;
+}