This is the mail archive of the
systemtap@sourceware.org
mailing list for the systemtap project.
[Bug uprobes/6842] system-wide utrace syscall tracing will cause kernel panic by hackbench.
- From: "mhiramat at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sources dot redhat dot com
- Date: 13 Aug 2008 23:43:13 -0000
- Subject: [Bug uprobes/6842] system-wide utrace syscall tracing will cause kernel panic by hackbench.
- References: <20080813220602.6842.mhiramat@redhat.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From mhiramat at redhat dot com 2008-08-13 23:43 -------
(In reply to comment #2)
> I encountered this case even without the process("*") variant,
> and worked around it thusly in pr4225 branch:
Oh, please commit that change! :-)
> __stp_utrace_task_finder_target_death:
>
> ...
> // Call the callback
> rc = tgt->callback(tsk, 0,
> (tsk->signal == NULL) || (atomic_read(&tsk->signal->live)
> == 0),
> tgt);
> ...
By the way, I couldn't find any execution path which sets tsk->signal=NULL before
calling __stp_utrace_task_finder_target_death().(it seems released at
__exit_signal()
called from release_task()...)
--
http://sourceware.org/bugzilla/show_bug.cgi?id=6842
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.