# HG changeset patch
# User Valentin Bartenev <vbart@nginx.com>
# Date 1355498278 0
# Node ID 58dfef910ccd16194bbeb0096ffcb43d2d1bd27d
# Parent  2464ccebdb52cb76becef639befab7713affe7d8
Gzip: fixed zlib memLevel adjusting.

An incorrect memLevel (lower than 1) might be passed to deflateInit2() if the
"gzip_hash" directive is set to a value less than the value of "gzip_window"
directive. This resulted in "deflateInit2() failed: -2" alert and an empty
reply.

diff --git a/src/http/modules/ngx_http_gzip_filter_module.c b/src/http/modules/ngx_http_gzip_filter_module.c
--- a/src/http/modules/ngx_http_gzip_filter_module.c
+++ b/src/http/modules/ngx_http_gzip_filter_module.c
@@ -498,6 +498,10 @@ ngx_http_gzip_filter_memory(ngx_http_req
             wbits--;
             memlevel--;
         }
+
+        if (memlevel < 1) {
+            memlevel = 1;
+        }
     }
 
     ctx->wbits = wbits;