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Date:      Mon, 16 Mar 2015 05:18:43 -0500
From:      "Matthew D. Fuller" <fullermd@over-yonder.net>
To:        Pawel Jakub Dawidek <pjd@FreeBSD.org>
Cc:        freebsd-geom@freebsd.org
Subject:   Re: RFC: Pass TRIM through GELI
Message-ID:  <20150316101843.GE52331@over-yonder.net>
In-Reply-To: <20150316101323.GD52331@over-yonder.net>
References:  <20150308000131.GP1742@over-yonder.net> <20150314151453.GJ24274@over-yonder.net> <501bca86.508d8e26@fabiankeil.de> <20150315145324.GA52331@over-yonder.net> <20150315182444.GB52331@over-yonder.net> <20150316010845.GA1515@garage.freebsd.pl> <20150316092126.GC52331@over-yonder.net> <20150316100030.GB1515@garage.freebsd.pl> <20150316101323.GD52331@over-yonder.net>

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On Mon, Mar 16, 2015 at 05:13:23AM -0500 I heard the voice of
Matthew D. Fuller, and lo! it spake thus:
> 
> , so eli_metadata_decode() EINVAL's right up at the top before
> filling anything into the passed md.  As a result, in
> g_eli_ctl_configure(), it gets (keeps) stack garbage in the var.

As a side note, this seems to turn from "darn" to "panic" because in
g_eli_read_metadata(), it doesn't check the return from
eli_metadata_decode(), so it doesn't notice the EINVAL and happily
reports back success without ever having touched the md   :(


-- 
Matthew Fuller     (MF4839)   |  fullermd@over-yonder.net
Systems/Network Administrator |  http://www.over-yonder.net/~fullermd/
           On the Internet, nobody can hear you scream.



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