[nginx] svn commit: r4783 - trunk/src/core

[mdounin at mdounin.ru]

Author: mdounin
Date: 2012-08-03 09:10:39 +0000 (Fri, 03 Aug 2012)
New Revision: 4783
URL: http://trac.nginx.org/nginx/changeset/4783/nginx

Log:
Fixed possible use of old cached times if runtime went backwards.

If ngx_time_sigsafe_update() updated only ngx_cached_err_log_time, and
then clock was adjusted backwards, the cached_time[slot].sec might
accidentally match current seconds on next ngx_time_update() call,
resulting in various cached times not being updated.

Fix is to clear the cached_time[slot].sec to explicitly mark cached times
are stale and need updating.


Modified:
   trunk/src/core/ngx_times.c

Modified: trunk/src/core/ngx_times.c
===================================================================
--- trunk/src/core/ngx_times.c	2012-08-03 09:07:30 UTC (rev 4782)
+++ trunk/src/core/ngx_times.c	2012-08-03 09:10:39 UTC (rev 4783)
@@ -211,6 +211,10 @@
         slot++;
     }
 
+    tp = &cached_time[slot];
+
+    tp->sec = 0;
+
     ngx_gmtime(sec + cached_gmtoff * 60, &tm);
 
     p = &cached_err_log_time[slot][0];