From: Vince Weaver <vincent.weaver@maine.edu>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
"davej@codemonkey.org.uk" <davej@codemonkey.org.uk>,
Stephane Eranian <eranian@gmail.com>
Subject: Re: perf: fuzzer KASAN perf_callchain_store on amd
Date: Wed, 16 Nov 2016 13:32:51 -0500 (EST) [thread overview]
Message-ID: <alpine.DEB.2.20.1611161329171.4881@macbook-air> (raw)
In-Reply-To: <CACT4Y+ZOfMKtW48R3th2KQ+E5xUy9krTfVx5hZ9-mrxTsQdy5Q@mail.gmail.com>
On Wed, 16 Nov 2016, Dmitry Vyukov wrote:
> On Wed, Nov 16, 2016 at 5:33 PM, Vince Weaver <vincent.weaver@maine.edu> wrote:
> >
> > [118725.787218] [<ffffffff811d1512>] ? save_stack+0x33/0xa6
> > [118725.793967] [<ffffffff811d1512>] ? save_stack+0x33/0xa6
> > [118725.800690] [<ffffffff811d1512>] ? save_stack+0x33/0xa6
> > [118725.807393] [<ffffffff811d1512>] ? save_stack+0x33/0xa6
> > ...
>
>
> This is heap OOB rather than stack OOB.
> Is there an allocation stack/object size/shadow in the report? It
> would greatly help debugging.
No, the report just trailed off and then launched into the next KASAN
report without anything in between (see below).
I am reporting what was in dmesg, I lost the serial console output.
I'm currently re-running on the same machine, hopefully I can reproduce it.
[118726.110077] [<ffffffff811d1512>] ? save_stack+0x33/0xa6
[118726.115849] [<ffffffff811d1512>] ? save_stack+0x33/0xa6
[118726.121615] [<ffffffff811d1512>] ? save_stack+0x33/0xa6
[118726.127385] [<ffffffff811d
[118726.139200] BAD LUCK: lost 11949 message(s) from NMI context!
[118726.139201]
==================================================================
[118726.153327] BUG: KASAN: slab-out-of-bounds in perf_callchain_store+0x69/0x84 at addr ffff8801d4fbe800
prev parent reply other threads:[~2016-11-16 18:32 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-16 16:33 Vince Weaver
2016-11-16 16:38 ` Dmitry Vyukov
2016-11-16 18:32 ` Vince Weaver [this message]
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