[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20090527232617.2FE48FC2BD@magilla.sf.frob.com>
Date: Wed, 27 May 2009 16:26:17 -0700 (PDT)
From: Roland McGrath <roland@...hat.com>
To: Oleg Nesterov <oleg@...hat.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Christoph Hellwig <hch@...radead.org>,
Ingo Molnar <mingo@...e.hu>,
Pavel Emelyanov <xemul@...nvz.org>,
Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] ptrace: do_notify_parent_cldstop: fix the wrong
->nsproxy usage
> No, task_pid_vnr(current) in ptrace_notify() is not right. If the tracer
> does PTRACE_GETSIGINFO it gets the wrong .si_pid.
I don't follow. PTRACE_GETSIGINFO gets the tracee's siginfo_t data--modulo
32/64 conversions it's the data structure the tracee process sees on its
stack when running a handler. It's not like a signal sent into the
tracer's queue (like SIGCHLD in do_notify_*), where the kernel doing
translation to the tracer's context makes sense. It's more like some
memory you read from the tracee.
Thanks,
Roland
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists