From: Peter Zijlstra <peterz@infradead.org>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>,
"x86@kernel.org" <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: perf: out-of-bounds write in perf_callchain_store
Date: Tue, 6 Sep 2016 17:06:40 +0200 [thread overview]
Message-ID: <20160906150640.GH2794@worktop> (raw)
In-Reply-To: <CACT4Y+YmwoJUkd3aU6u2v+W3s2AXn=qwB=cAN3wAWCA5JL4psA@mail.gmail.com>
On Tue, Sep 06, 2016 at 04:49:29PM +0200, Dmitry Vyukov wrote:
> On Tue, Sep 6, 2016 at 4:44 PM, Arnaldo Carvalho de Melo
> > I looked at it briefly some moments ago, couldn't find it so far, have
> > to look at what was behind adding a sysctl for that :-\
> >
> > And yeah, that entry/ctx thing, IIRC, was done to reduce patch size,
> > probably needs some polishing to become clearer.
>
>
> I believe fuzzer wasn't messing with sysctl's.
> But, yeah, I guess it's really bad idea to try to change them on a
> running system.
The sysctl's should return -EBUSY if its in use...
prev parent reply other threads:[~2016-09-06 16:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-06 13:42 perf: out-of-bounds write in perf_callchain_store Dmitry Vyukov
2016-09-06 14:36 ` Peter Zijlstra
2016-09-06 14:44 ` Arnaldo Carvalho de Melo
2016-09-06 14:49 ` Dmitry Vyukov
2016-09-06 15:05 ` Arnaldo Carvalho de Melo
2016-09-06 15:18 ` Dmitry Vyukov
2016-09-06 15:06 ` Peter Zijlstra [this message]
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