[Varnish] #742: vcl.show possible segmentation fault when using format-strings

[Varnish]

#742: vcl.show possible segmentation fault when using format-strings
-------------------+--------------------------------------------------------
 Reporter:  nav    |        Type:  defect
   Status:  new    |    Priority:  normal
Milestone:         |   Component:  build 
  Version:  trunk  |    Severity:  normal
 Keywords:         |  
-------------------+--------------------------------------------------------
 Using following vcl code may cause segfault while handling vcl.show
 command.
 {{{
 C{
   void whatever_function_that_is_never_called(){
     // Important part are the %s
     syslog(0, "%s %s %s", "", "", "");
   }
 }C
 }}}

 Problem occurs when mentioned command is issued. To show code function
 cli_out is used without additional arguments. This function handles input
 as format string + params - therefore these %s will be replaced by data on
 stack.

 Sometimes you can get only trash in your vcl code, but its possible to get
 segfault. The more %s the bigger is probability of segfault.

-- 
Ticket URL: <http://varnish-cache.org/ticket/742>
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