Bug 458019 - kernel: random32: seeding improvement [rhel-5.3]
Summary: kernel: random32: seeding improvement [rhel-5.3]
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.3
Hardware: All
OS: Linux
medium
medium
Target Milestone: rc
: ---
Assignee: Jiri Pirko
QA Contact: Martin Jenner
URL:
Whiteboard:
Depends On: 458016
Blocks: 458021
TreeView+ depends on / blocked
 
Reported: 2008-08-06 06:29 UTC by Eugene Teo (Security Response)
Modified: 2015-05-05 01:15 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
random32() seeding has been improved.
Clone Of:
Environment:
Last Closed: 2009-01-20 20:15:03 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2009:0225 0 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 5.3 kernel security and bug fix update 2009-01-20 16:06:24 UTC

Description Eugene Teo (Security Response) 2008-08-06 06:29:36 UTC
+++ This bug was initially created as a clone of Bug #458016 +++

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

--- Additional comment from eteo on 2008-08-06 02:18:35 EDT ---

Proposed upstream patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=697f8d0348a652593d195a13dd1067d9df911a82

--- Additional comment from eteo on 2008-08-06 02:22:51 EDT ---

Created an attachment (id=313529)
Upstream patch for this issue

Comment 3 RHEL Program Management 2008-09-04 16:55:00 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 4 Don Zickus 2008-09-10 20:14:37 UTC
in kernel-2.6.18-110.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Comment 7 Ryan Lerch 2008-11-06 06:37:28 UTC
This bug (feature request) has been marked for inclusion in the Red Hat
Enterprise Linux 5.3 Release Notes.

To aid in the development of relevant and accurate release notes, please fill
out the "Release Notes" field above with the following 4 pieces of information:


Cause:   What actions or circumstances induced the feature request.

Consequence:  What action was inhibited by the feature's absence.

Fix:   What was done to implement the feature.

Result:  now happens when the actions or circumstances above occur. (NB: this
is not the same as 'the feature request was fulfilled')

Comment 8 Jiri Pirko 2008-11-06 07:03:54 UTC
Release note added. If any revisions are required, please set the 
"requires_release_notes" flag to "?" and edit the "Release Notes" field accordingly.
All revisions will be proofread by the Engineering Content Services team.

New Contents:
random32() seeding has been improved.

Comment 14 errata-xmlrpc 2009-01-20 20:15:03 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-2009-0225.html


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