|Summary:||ptrace changes to registers during ia32 syscall tracing stop are lost|
|Product:||Red Hat Enterprise Linux 3||Reporter:||Roland McGrath <roland>|
|Component:||kernel||Assignee:||Roland McGrath <roland>|
|Status:||CLOSED ERRATA||QA Contact:||Brian Brock <bbrock>|
|Version:||3.0||CC:||jparadis, petrides, tao|
|Fixed In Version:||RHSA-2005-663||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2005-09-28 15:16:54 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Cloudforms Team:||---||Target Upstream Version:|
|Bug Depends On:|
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