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Re: sound: use-after-free in snd_timer_interrupt

From Takashi Iwai <tiwai@suse.de>
Newsgroups linux.kernel
Subject Re: sound: use-after-free in snd_timer_interrupt
Date 2016-01-15 16:50 +0100
Message-ID <qReNs-89q-1@gated-at.bofh.it> (permalink)
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On Fri, 15 Jan 2016 16:28:33 +0100,
Dmitry Vyukov wrote:
> 
> On Fri, Jan 15, 2016 at 4:21 PM, Takashi Iwai <tiwai@suse.de> wrote:
> > So you're running this in parallel?  Or a tight sequential loop?
> > I did the latter, and I tried even this on a bare metal, but couldn't
> > trigger the Oops, so far.
> 
> Yes, I run it in parallel using:
> 
> $ go get golang.org/x/tools/cmd/stress
> $ ./stress -p 8 ./a.out
> 
> But it just keeps 8 parallel processes running.

OK, then a bit different than I tested.  Will check.

> > Meanwhile, I pushed the tree including all fixes at for-linus branch:
> >   git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git for-linus
> >
> > It'd be appreciated if you can test this one.
> 
> Is it different from the patches you mailed?

No, they should be basically same, but just to make sure that we're
on the same ground.

> I keep several dozens
> fixes for bugs that are not yet merged into Linus tree + own kcov
> patch. It is not easy to rebase...

The branch should be pullable onto 4.4-final cleanly.

> Here is what I now have for sound/
> https://gist.githubusercontent.com/dvyukov/dc29dbfd320126285fd8/raw/e2ca7b59c0dc118045f9fb4e3d052cbc751e787e/gistfile1.txt
> 

Takashi

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Thread

sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-13 16:10 +0100
  Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-13 18:00 +0100
    Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-13 19:40 +0100
      Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-13 20:10 +0100
        Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-13 20:40 +0100
          Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-13 20:50 +0100
            Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-13 21:40 +0100
              Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-13 21:50 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-13 22:00 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-14 17:20 +0100
                Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-15 09:10 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-15 12:10 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-15 15:00 +0100
                Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-15 15:40 +0100
                Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-15 16:30 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-15 16:50 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-15 16:30 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-15 20:20 +0100
                Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-15 20:50 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-15 22:30 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-15 22:50 +0100
                Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-18 12:00 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-18 14:10 +0100
                Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-18 14:40 +0100
                Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-18 14:40 +0100
                Re: sound: use-after-free in snd_timer_interrupt Dmitry Vyukov <dvyukov@google.com> - 2016-01-15 20:20 +0100
          Re: sound: use-after-free in snd_timer_interrupt Takashi Iwai <tiwai@suse.de> - 2016-01-13 21:50 +0100

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