Bugzilla will be upgraded to version 5.0 on a still to be determined date in the near future. The original upgrade date has been delayed.
Bug 133020 - (IT_49848) [RHEL3][IA32E][X86_64]Wrong FPU IP and DP in the SIGFPE signal context
[RHEL3][IA32E][X86_64]Wrong FPU IP and DP in the SIGFPE signal context
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: kernel (Show other bugs)
ia32e Linux
medium Severity high
: ---
: ---
Assigned To: Larry Woodman
Brian Brock
Depends On:
Blocks: 132991
  Show dependency treegraph
Reported: 2004-09-20 18:04 EDT by Suresh Siddha
Modified: 2007-11-30 17:07 EST (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-05-18 09:28:09 EDT
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Test case which fails with SIGSEGV (1.33 KB, text/plain)
2004-09-20 18:06 EDT, Suresh Siddha
no flags Details
Patch adding the missing rex prefix (421 bytes, patch)
2004-09-20 18:11 EDT, Suresh Siddha
no flags Details | Diff

External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2005:294 normal SHIPPED_LIVE Moderate: Updated kernel packages available for Red Hat Enterprise Linux 3 Update 5 2005-05-18 00:00:00 EDT

  None (edit)
Description Suresh Siddha 2004-09-20 18:04:09 EDT
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)

Description of problem:
In synchronous SIGFPE signal context, kernel is setting FPU IP and DP 
as CS:32bitIP and DS:32bitDP instead of 64bit IP and DP with out 
segment selectors. This is because of missing  "rex" prefix in   
save_init_fpu() fxsave

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. Compile and run the attached test case in comment #1
2. It fails with SIGSEGV because of pointer mismatch.

Additional info:
Comment 1 Suresh Siddha 2004-09-20 18:06:18 EDT
Created attachment 104040 [details]
Test case which fails with SIGSEGV
Comment 2 Suresh Siddha 2004-09-20 18:11:55 EDT
Created attachment 104041 [details]
Patch adding the missing rex prefix
Comment 4 Jim Paradis 2005-02-16 17:32:30 EST
Patch ready to submit to U5
Comment 5 Ernie Petrides 2005-02-17 08:49:46 EST
A fix for this problem has just been committed to the RHEL3 U5
patch pool this evening (in kernel version 2.4.21-27.15.EL).
Comment 6 Tim Powers 2005-05-18 09:28:09 EDT
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.


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