From: Vince Weaver <vincent.weaver@maine.edu>
To: linux-kernel@vger.kernel.org
Cc: Borislav Petkov <bp@suse.de>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: Re: perf: fuzzer crashes immediately on AMD system
Date: Thu, 18 Aug 2016 10:46:31 -0400 (EDT) [thread overview]
Message-ID: <alpine.DEB.2.20.1608181046120.19862@macbook-air> (raw)
In-Reply-To: <alpine.DEB.2.20.1608181025160.19862@macbook-air>
On Thu, 18 Aug 2016, Vince Weaver wrote:
> Tried the perf_fuzzer on my A10 fam15h/model13h system with 4.8-rc2 and it
> falls over more or less immediately.
>
> This maps to variable_test_bit()
> called by ctx = find_get_context(pmu, task, event);
> in kernel/events/core.c:9467
>
> It happens quickly enough I can probably track down the exact event that
> causes this, if needed.
I have a one line reproducer:
perf stat -a -e amd_nb/config=0x37,config1=0x20/ /bin/ls
next prev parent reply other threads:[~2016-08-18 14:46 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-18 14:32 Vince Weaver
2016-08-18 14:46 ` Vince Weaver [this message]
2016-08-19 10:01 ` Peter Zijlstra
2016-08-19 10:56 ` Peter Zijlstra
2016-08-19 15:03 ` Vince Weaver
2016-08-19 16:38 ` Vince Weaver
2016-08-20 4:44 ` Vince Weaver
2016-08-22 11:16 ` Huang Rui
2016-08-23 1:02 ` Vince Weaver
2016-08-23 2:54 ` Vince Weaver
2016-08-23 8:45 ` Peter Zijlstra
2016-08-23 11:53 ` Vince Weaver
2016-08-24 9:19 ` Ingo Molnar
2016-08-24 13:20 ` Vince Weaver
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