Bug #4338
closedrandom number generator not reseeded after fork in 1.8
Description
=begin
rand should return different values in forked processes like in 1.9.2. This
may have security implications for some programs.
Remembering to call srand after forking will fix the issue, but remembering is
hard especially since 1.9.2 makes it easy :)
The following example prints out 3 identical lines in 1.8.7:
fork { $stdout.syswrite("#{rand}\n") }
fork { $stdout.syswrite("#{rand}\n") }
$stdout.syswrite("#{rand}\n")
Process.waitall
=end
Updated by normalperson (Eric Wong) almost 14 years ago
=begin
Eric Wong redmine@ruby-lang.org wrote:
Bug #4338: random number generator not reseeded after fork in 1.8
http://redmine.ruby-lang.org/issues/show/4338Author: Eric Wong
Status: Open, Priority: Normal
Category: core, Target version: Ruby 1.8.7
ruby -v: ruby 1.8.7 (2010-12-23 patchlevel 330) [x86_64-linux]
I should also add that this was not an issue in Ruby 1.8.6-p114, but
it is in 1.8.6-p399. So a regression slipped in somewhere along the
way.
--
Eric Wong
=end
Updated by normalperson (Eric Wong) almost 14 years ago
=begin
Eric Wong redmine@ruby-lang.org wrote:
Bug #4338: random number generator not reseeded after fork in 1.8
http://redmine.ruby-lang.org/issues/show/4338Author: Eric Wong
Status: Open, Priority: Normal
Category: core, Target version: Ruby 1.8.7
ruby -v: ruby 1.8.7 (2010-12-23 patchlevel 330) [x86_64-linux]
I should also add that this was not an issue in Ruby 1.8.6-p114, but
it is in 1.8.6-p399. So a regression slipped in somewhere along the
way.
--
Eric Wong
=end
Updated by normalperson (Eric Wong) over 13 years ago
=begin
Hello? Can somebody please look into this? Thanks.
=end
Updated by shyouhei (Shyouhei Urabe) over 13 years ago
- Status changed from Open to Assigned
- Assignee set to shyouhei (Shyouhei Urabe)
=begin
OK, now I consider this is a bug. To be fixed on the next patchlevel. Stay tuned.
=end
Updated by shyouhei (Shyouhei Urabe) over 13 years ago
- Status changed from Assigned to Closed
I think I have fixed this.