Bug 458016 - kernel: random32: seeding improvement [mrg-1]
Summary: kernel: random32: seeding improvement [mrg-1]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise MRG
Classification: Red Hat
Component: realtime-kernel
Version: 1.1
Hardware: All
OS: Linux
medium
medium
Target Milestone: 1.0.3
: ---
Assignee: Luis Claudio R. Goncalves
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 458019 458021 458022 458023 458212
TreeView+ depends on / blocked
 
Reported: 2008-08-06 06:16 UTC by Eugene Teo (Security Response)
Modified: 2008-10-07 19:20 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2008-10-07 19:20:43 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
Upstream patch for this issue (2.86 KB, patch)
2008-08-06 06:22 UTC, Eugene Teo (Security Response)
no flags Details | Diff


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2008:0857 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2008-10-07 19:18:59 UTC

Description Eugene Teo (Security Response) 2008-08-06 06:16:20 UTC
Description of problem:
Stephen Hemminger wrote a patch to improve random32() seeding.

The rationale is:
   * use u32 consistently
   * no need to do LCG on values from (better) get_random_bytes
   * use more data from get_random_bytes for secondary seeding
   * don't reduce state space on srandom32()
   * enforce state variable initialization restrictions

Comment 2 Eugene Teo (Security Response) 2008-08-06 06:22:51 UTC
Created attachment 313529 [details]
Upstream patch for this issue

Comment 4 Eugene Teo (Security Response) 2008-08-26 16:54:13 UTC
It needs the following upstream patch as well:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=61407f80f72970d52d4339f81c6c3cd03f4ca0f0

Comment 5 Luis Claudio R. Goncalves 2008-09-04 20:42:52 UTC
This second patch is queued for -79

Comment 7 David Sommerseth 2008-09-23 08:42:33 UTC
Verified that upstream patch 697f8d0348a652593d195a13dd1067d9df911a82 is included in mrg-rt-2.6.24.7-81

Comment 9 errata-xmlrpc 2008-10-07 19:20:43 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2008-0857.html


Note You need to log in before you can comment on or make changes to this bug.