# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1360468346 0
# Node ID 63a6b6d708268a22857417f992d093e32d9182c9
# Parent  48d1606107d44e721f7a7f1246def67b97e64023
Merge of r4966: 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
@@ -497,6 +497,10 @@ ngx_http_gzip_filter_memory(ngx_http_req
             wbits--;
             memlevel--;
         }
+
+        if (memlevel < 1) {
+            memlevel = 1;
+        }
     }
 
     ctx->wbits = wbits;