From: Kurt Schwehr <schwehr@google.com>
Date: Mon, 11 Sep 2017 14:23:00 +0000 (-0700)
Subject: Fix double to int cast overflow in json_object_get_int64.
X-Git-Tag: json-c-0.13-20171207~46^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F361%2Fhead;p=thirdparty%2Fjson-c.git

Fix double to int cast overflow in json_object_get_int64.

Found with autofuzz in GDAL
---

diff --git a/json_object.c b/json_object.c
index 9ffb149d..8cd5922e 100644
--- a/json_object.c
+++ b/json_object.c
@@ -688,6 +688,10 @@ int64_t json_object_get_int64(const struct json_object *jso)
 	case json_type_int:
 		return jso->o.c_int64;
 	case json_type_double:
+		if (jso->o.c_double >= INT64_MAX)
+			return INT64_MAX;
+		if (jso->o.c_double <= INT64_MIN)
+			return INT64_MIN;
 		return (int64_t)jso->o.c_double;
 	case json_type_boolean:
 		return jso->o.c_boolean;