Bug 225531

Summary: ia64 PTRACE_GETREGS touches pt_all_user_regs words that should be left alone
Product: Red Hat Enterprise Linux 5 Reporter: Roland McGrath <roland>
Component: kernelAssignee: Roland McGrath <roland>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: low Docs Contact:
Priority: medium    
Version: 5.0CC: bibo.mao, luyu
Target Milestone: ---Keywords: Regression
Target Release: ---   
Hardware: ia64   
OS: Linux   
Whiteboard:
Fixed In Version: RHBA-2007-0959 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-11-07 19:23:36 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 243319    
Attachments:
Description Flags
test case
none
patch to fix the issue none

Description Roland McGrath 2007-01-31 05:40:54 UTC 
Older kernels' PTRACE_GETREGS request ignored certain words and did not fill in
the user memory there at all.  The utrace patch broke this.

The output of the attached test case should be:

Unmodified register by PTRACE_GETREGS request
 gr0 --- gr0
 ar1 --- ar15
 ar21 --- ar31
 ar34 --- ar35
 ar38 --- ar39
 ar42 --- ar63
 ar68 --- ar127
 fr0 --- fr1
Comment 1 Roland McGrath 2007-01-31 05:40:55 UTC 
Created attachment 147002 [details]
test case
Comment 2 RHEL Program Management 2007-01-31 06:25:09 UTC 
This bugzilla has Keywords: Regression.  

Since no regressions are allowed between releases, 
it is also being proposed as a blocker for this release.  

Please resolve ASAP.
Comment 3 Luming Yu 2007-04-02 03:21:52 UTC 
Is it fixed in upstream?
Comment 4 Luming Yu 2007-04-10 09:32:17 UTC 
Tested with latest upstream kernel with utrace patch linux-2.6-utrace.patch.
There isn't such problem.
Comment 6 Luming Yu 2007-05-08 08:55:48 UTC 
Created attachment 154319 [details]
patch to fix the issue

Does this patch fix your problem. 
I tested it with the latest redhat el5 kernel on ia64 box. It works as
expected.
Comment 7 Roland McGrath 2007-05-08 09:00:18 UTC 
I filed this bug on myself for tracking purposes.
I already plan a utrace update for 5.1 that will pull in all the upstream fixes,
including this one.  No need to separately backport it.
Comment 9 RHEL Program Management 2007-06-20 12:31:53 UTC 
This request was evaluated by Red Hat Kernel Team for inclusion in a Red
Hat Enterprise Linux maintenance release, and has moved to bugzilla 
status POST.
Comment 10 Don Zickus 2007-07-19 19:54:13 UTC 
in kernel-2.6.18-30.el5
Comment 12 Mike Gahagan 2007-08-28 18:10:28 UTC 
Confirmed proper operation of the test case with the -43 kernel.
Comment 14 errata-xmlrpc 2007-11-07 19:23:36 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 the 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/RHBA-2007-0959.html