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Bug 225531 - ia64 PTRACE_GETREGS touches pt_all_user_regs words that should be left alone
Summary: ia64 PTRACE_GETREGS touches pt_all_user_regs words that should be left alone
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.0
Hardware: ia64
OS: Linux
Target Milestone: ---
: ---
Assignee: Roland McGrath
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2007-01-31 05:40 UTC by Roland McGrath
Modified: 2007-11-30 22:07 UTC (History)
2 users (show)

Fixed In Version: RHBA-2007-0959
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2007-11-07 19:23:36 UTC
Target Upstream Version:

Attachments (Terms of Use)
test case (deleted)
2007-01-31 05:40 UTC, Roland McGrath
no flags Details
patch to fix the issue (deleted)
2007-05-08 08:55 UTC, Luming Yu
no flags Details | Diff

System ID Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2007:0959 normal SHIPPED_LIVE Updated kernel packages for Red Hat Enterprise Linux 5 Update 1 2007-11-08 00:47:37 UTC

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 Product and 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

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 Product and 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.

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