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Date:      Thu, 21 Mar 2019 09:36:30 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 235783] Repeated ZFS-related kernel panic
Message-ID:  <bug-235783-3630-grwpeIRP6m@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-235783-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-235783-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D235783

--- Comment #10 from Andriy Gapon <avg@FreeBSD.org> ---
(In reply to Jurij Kovacic from comment #9)
Okay, compare the value of r13 (and this is the original db pointer) to the
value in rcx. They differ by a single bit:
(gdb) p/x 0xfffff8028de9cae0 ^ 0xffff78028de9cae0
$1 =3D 0x800000000000

The values in rbx and rax are derived from the value in rcx.  And the crash
happens when accessing the address stored in rax.

This was a long way to say that most likely you got a single bit flip on the
hardware level.  I assume that the RAM is not ECC.

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