Red Hat Bugzilla – Bug 159790
ptrace changes to registers during ia32 syscall tracing stop are lost
Last modified: 2007-11-30 17:07:07 EST
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
Created attachment 115202 [details]
RHEL3 kernel patch fixing this bug
Patch posted for internal review on 7-Jun-2005.
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).
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.