[nginx] svn commit: r4405 - trunk/src/core

[vbart at nginx.com]

Author: vbart
Date: 2012-01-16 12:42:07 +0000 (Mon, 16 Jan 2012)
New Revision: 4405

Modified:
   trunk/src/core/ngx_hash.c
Log:
Fixed devision by zero exception in ngx_hash_init().

The ngx_hash_init() function did not expect call with zero elements count,
which caused FPE error on configs with an empty "types" block in http context
and "types_hash_max_size" > 10000.

Example configuration to reproduce:

  events { }

  http {
          types_hash_max_size 10001;
          types {}
          server {}
  }



Modified: trunk/src/core/ngx_hash.c
===================================================================
--- trunk/src/core/ngx_hash.c	2012-01-16 11:13:48 UTC (rev 4404)
+++ trunk/src/core/ngx_hash.c	2012-01-16 12:42:07 UTC (rev 4405)
@@ -277,7 +277,7 @@
     start = nelts / (bucket_size / (2 * sizeof(void *)));
     start = start ? start : 1;
 
-    if (hinit->max_size > 10000 && hinit->max_size / nelts < 100) {
+    if (hinit->max_size > 10000 && nelts && hinit->max_size / nelts < 100) {
         start = hinit->max_size - 1000;
     }