Re: BUG_ON drivers/char/random.c:986 (Was: perf: use after free in perf_remove_from_context)

From: Sasha Levin
Date: Sat May 17 2014 - 12:33:28 EST


On 05/16/2014 10:18 PM, Theodore Ts'o wrote:
> On Fri, May 16, 2014 at 05:46:22PM -0700, Hannes Frederic Sowa wrote:
>> > This should do the trick:
>> > dd if=/dev/urandom of=/dev/zero bs=67108707
>> >
>> > I suspect ee1de406ba6eb1 ("random: simplify accounting logic") as the
>> > culprit.
> Yep, that it's it. Thanks for noticing this so quickly! I'll push
> the following patch to Linus.

Peter, could you describe the infrastructure you're running on? I don't
think Dave or myself have ever hit this issue, and I wonder what made you
stumble on it.


Thanks,
Sasha
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