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fix segfault if cache key is larger than upstream buffer size
patch by Lanshun Zhou
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@ -661,6 +661,15 @@ ngx_http_upstream_cache(ngx_http_request_t *r, ngx_http_upstream_t *u)
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ngx_http_file_cache_create_key(r);
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if (r->cache->header_start >= u->conf->buffer_size) {
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ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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"cache key too large, increase upstream buffer size %uz",
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u->conf->buffer_size);
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r->cache = NULL;
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return NGX_DECLINED;
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}
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switch (ngx_http_test_predicates(r, u->conf->cache_bypass)) {
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case NGX_ERROR:
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