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Date:      Sat, 29 Sep 2018 16:12:44 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 231793] panic: [pmc,4965] pm=0xfffff80480ff2400 runcount 0
Message-ID:  <bug-231793-227-DZTIpfgZ3d@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-231793-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-231793-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D231793

--- Comment #3 from Mark Johnston <markj@FreeBSD.org> ---
I see at least one problem that can probably cause this:
pmc_capture_user_callchain() processes samples with nsamples =3D=3D
PMC_SAMPLE_INUSE, but there doesn't seem to be anything preventing
pmc_add_sample() from overwriting such a sample during that processing.

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