Bug 159790 - ptrace changes to registers during ia32 syscall tracing stop are lost
Summary: ptrace changes to registers during ia32 syscall tracing stop are lost
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: kernel
Version: 3.0
Hardware: x86_64
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Roland McGrath
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks: 156320 158925
TreeView+ depends on / blocked
 
Reported: 2005-06-07 23:54 UTC by Roland McGrath
Modified: 2007-11-30 22:07 UTC (History)
3 users (show)

Fixed In Version: RHSA-2005-663
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2005-09-28 15:16:54 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
RHEL3 kernel patch fixing this bug (576 bytes, patch)
2005-06-07 23:54 UTC, Roland McGrath 		no flags Details | Diff
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2005:663 0 qe-ready SHIPPED_LIVE Important: Updated kernel packages available for Red Hat Enterprise Linux 3 Update 6 2005-09-28 04:00:00 UTC

Description Roland McGrath 2005-06-07 23:54:23 UTC 
When an ia32 process is stopped for syscall tracing, ptrace can be used to
modify its registers and that should change the register arguments seen by the
system call.  strace relies on this facility.

In the RHEL3 kernel, changes to registers that aren't used for 64-bit arguments
are lost.
Comment 1 Roland McGrath 2005-06-07 23:54:23 UTC 
Created attachment 115202 [details]
RHEL3 kernel patch fixing this bug
Comment 2 Ernie Petrides 2005-06-09 00:12:53 UTC 
Patch posted for internal review on 7-Jun-2005.
Comment 4 Ernie Petrides 2005-06-15 01:01:32 UTC 
A fix for this problem has just been committed to the RHEL3 U6
patch pool this evening (in kernel version 2.4.21-32.8.EL).
Comment 11 Red Hat Bugzilla 2005-09-28 15:16:54 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/RHSA-2005-663.html
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