Bug 225531 - ia64 PTRACE_GETREGS touches pt_all_user_regs words that should be left alone
ia64 PTRACE_GETREGS touches pt_all_user_regs words that should be left alone
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel (Show other bugs)
5.0
ia64 Linux
medium Severity low
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Assigned To: Roland McGrath
Brian Brock
: Regression
Depends On:
Blocks: 243319
  Show dependency treegraph
 
Reported: 2007-01-31 00:40 EST by Roland McGrath
Modified: 2007-11-30 17:07 EST (History)
2 users (show)

See Also:
Fixed In Version: RHBA-2007-0959
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Environment:
Last Closed: 2007-11-07 14:23:36 EST
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Regression: ---
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)
test case (3.48 KB, text/plain)
2007-01-31 00:40 EST, Roland McGrath
no flags Details
patch to fix the issue (1.84 KB, patch)
2007-05-08 04:55 EDT, Luming Yu
no flags Details | Diff

  None (edit)
Description Roland McGrath 2007-01-31 00:40:54 EST
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 00:40:55 EST
Created attachment 147002 [details]
test case
Comment 2 RHEL Product and Program Management 2007-01-31 01:25:09 EST
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 2007-04-01 23:21:52 EDT
Is it fixed in upstream?
Comment 4 Luming Yu 2007-04-10 05:32:17 EDT
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 04:55:48 EDT
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 05:00:18 EDT
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 08:31:53 EDT
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 15:54:13 EDT
in kernel-2.6.18-30.el5
Comment 12 Mike Gahagan 2007-08-28 14:10:28 EDT
Confirmed proper operation of the test case with the -43 kernel. 
Comment 14 errata-xmlrpc 2007-11-07 14:23:36 EST
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

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