From 14110b311cc8e38d9b48e55b02386330ce3ed49a Mon Sep 17 00:00:00 2001
From: Igor Sysoev <igor@sysoev.ru>
Date: Sat, 6 Jan 2007 18:52:06 +0000
Subject: [PATCH] fix zero size shared zones

---
 src/core/ngx_cycle.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/core/ngx_cycle.c b/src/core/ngx_cycle.c
index 89408fb4a..ff4888ab2 100644
--- a/src/core/ngx_cycle.c
+++ b/src/core/ngx_cycle.c
@@ -366,6 +366,13 @@ ngx_init_cycle(ngx_cycle_t *old_cycle)
             i = 0;
         }
 
+        if (shm_zone[i].shm.size == 0) {
+            ngx_log_error(NGX_LOG_EMERG, log, 0,
+                          "zero size shared memory zone \"%V\"",
+                          &shm_zone[i].name);
+            goto failed;
+        }
+
         shm_zone[i].shm.log = cycle->log;
 
         opart = &old_cycle->shared_memory.part;