[Bug uprobes/6842] system-wide utrace syscall tracing will cause kernel panic by hackbench.

[mhiramat at redhat dot com]

------- 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

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