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Date: Sat, 20 Sep 2014 23:05:46 +0400 From: Kirill Tkhai <tkhai@...dex.ru> To: Peter Zijlstra <peterz@...radead.org> CC: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>, Kirill Tkhai <ktkhai@...allels.com> Subject: Re: [PATCH 5/7] sched: Use rq->rd in sched_setaffinity() under RCU read lock On 20.09.2014 22:59, Peter Zijlstra wrote: > On Sat, Sep 20, 2014 at 08:51:40PM +0400, Kirill Tkhai wrote: >> From: Kirill Tkhai <ktkhai@...allels.com> >> >> task_rq(p)->rd and task_rq(p)->rd->span may be used-after-free here. >> Probability of NULL pointer derefference isn't zero in this place. > > I don't see NULL derefs, just use-after-free. > It's very paranod case :). Two pointers are here: task_rq(p)->rd (somebody zeroed it "rd") ->span -- 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/
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