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-rw-r--r--src/http/ngx_http_upstream.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index f9f09cb34..ad5b449ec 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -661,6 +661,15 @@ 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;
+ }
+
switch (ngx_http_test_predicates(r, u->conf->cache_bypass)) {
case NGX_ERROR: