From 60cf1399611ae1b2728492c94ff57a4a044774b4 Mon Sep 17 00:00:00 2001
From: Oisin Canty <o.canty@f5.com>
Date: Thu, 5 Aug 2021 16:00:01 +0000
Subject: Router: fixed crash when matching an empty address pattern array.

A crash would occur when the router tried to match an
against an empty address pattern array.

The following configuration was used to reproduce the
issue:

{
    "listeners": {
        "127.0.0.1:8082": {
            "pass": "routes"
        }
    },
    "routes": [
        {
            "match": {
                "source": []
            },
            "action": {
                "return": 200
            }
        }
    ]
}
---
 src/nxt_http_route.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src')

diff --git a/src/nxt_http_route.c b/src/nxt_http_route.c
index 065b3488..b330796f 100644
--- a/src/nxt_http_route.c
+++ b/src/nxt_http_route.c
@@ -1936,6 +1936,11 @@ nxt_http_route_addr_rule(nxt_http_request_t *r,
     nxt_http_route_addr_pattern_t  *p;
 
     n = addr_rule->items;
+
+    if (n == 0) {
+        return 0;
+    }
+
     p = &addr_rule->addr_pattern[0] - 1;
 
     do {
-- 
cgit