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Subject: [Bug 208275] Kernel panic when reading from /dev/cd0 with a damaged
 dvd
Date: Tue, 29 Mar 2016 15:06:42 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D208275

Konstantin Belousov <kib@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kib@FreeBSD.org

--- Comment #8 from Konstantin Belousov <kib@FreeBSD.org> ---
(In reply to Fabian Keil from comment #7)
I think the only needed part of the change is the move of n calculation aft=
er
the error check.

In head, cluster_read() and bread() relibably reset bp to NULL on error, _a=
nd_
brelse ignores NULL argument.  So it may be argued that the fix also could
remobe brelse() call from the error path.

--=20
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