From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Fri, 11 Jun 2021 15:47:37 +0000 (+0000)
Subject: Fixed RegExp.prototype.[@@split]() with UTF8 strings.
X-Git-Tag: 0.6.0~3
X-Git-Url: http://www.kaiwu.me/postgresql/commit/?a=commitdiff_plain;h=af2bd3ae0abd72aa1d493524495447daabeaca73;p=njs.git

Fixed RegExp.prototype.[@@split]() with UTF8 strings.

Found by OSS-Fuzz.
---

diff --git a/src/njs_regexp.c b/src/njs_regexp.c
index 838be7a6..ec29c06e 100644
--- a/src/njs_regexp.c
+++ b/src/njs_regexp.c
@@ -1828,7 +1828,8 @@ njs_regexp_prototype_symbol_split(njs_vm_t *vm, njs_value_t *args,
     end = &s.start[s.size];
 
     if (utf8 == NJS_STRING_UTF8) {
-        start = njs_string_offset(s.start, s.start + s.size, p);
+        start = (p < length) ? njs_string_offset(s.start, s.start + s.size, p)
+                             : end;
 
     } else {
         start = &s.start[p];
diff --git a/src/test/njs_unit_test.c b/src/test/njs_unit_test.c
index f26a4bd2..0b458ace 100644
--- a/src/test/njs_unit_test.c
+++ b/src/test/njs_unit_test.c
@@ -8861,6 +8861,9 @@ static njs_unit_test_t  njs_test[] =
     { njs_str("'abc'.split(/abc/)"),
       njs_str(",") },
 
+    { njs_str("('α'.repeat(32)).split(/./).length"),
+      njs_str("33") },
+
     { njs_str("'AbcDefGhi'.split(/([A-Z][a-z]+)/)"),
       njs_str(",Abc,,Def,,Ghi,") },