2 files changed, 10 insertions, 1 deletions
diff --git a/src/http/modules/perl/nginx.pm b/src/http/modules/perl/nginx.pm
index e403459bc..bb89dbf69 100644
--- a/src/http/modules/perl/nginx.pm
+++ b/src/http/modules/perl/nginx.pm
@@ -48,7 +48,7 @@ our @EXPORT = qw(
     HTTP_INSUFFICIENT_STORAGE
 );
 
-our $VERSION = '0.8.54';
+our $VERSION = '0.8.55';
 
 require XSLoader;
 XSLoader::load('nginx', $VERSION);
diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index e8d87738f..62f1669c7 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -666,6 +666,15 @@ ngx_http_upstream_cache(ngx_http_request_t *r, ngx_http_upstream_t *u)
 
         ngx_http_file_cache_create_key(r);
 
+        if (r->cache->header_start >= u->conf->buffer_size) {
+            ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
+                "cache key too large, increase upstream buffer size %uz",
+                u->conf->buffer_size);
+
+            r->cache = NULL;
+            return NGX_DECLINED;
+        }
+
         u->cacheable = 1;
 
         c = r->cache;