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Date:      Mon, 01 Jan 2018 16:20:35 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 224813] system panics on boot w/ "panic: invalid bcd nnn" due to broken RTC values
Message-ID:  <bug-224813-8-booZYaSrt9@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-224813-8@https.bugs.freebsd.org/bugzilla/>
References:  <bug-224813-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224813

Ian Lepore <ian@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ian@FreeBSD.org
             Status|New                         |Open
           Assignee|freebsd-bugs@FreeBSD.org    |ian@FreeBSD.org

--- Comment #1 from Ian Lepore <ian@FreeBSD.org> ---
I began to work on this, with the idea of adding some common code that all =
RTC
drivers can use to validate the bcd.  Then, when I looked at atrtc.c I
discovered it already has code to validate the bcd values, added in r314936=
.=20
That means that this error just shouldn't be possible now unless the current
validation is incorrect (it looks okay to me), or the compiler is generating
bad code (which I tried to investigate, but my x86 asm skills are 25 years =
out
of date).

--=20
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