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Re: [Qemu-devel] [PATCH 3/4] Add a protective section footer

From: Juan Quintela
Subject: Re: [Qemu-devel] [PATCH 3/4] Add a protective section footer
Date: Wed, 20 May 2015 10:53:49 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

"Dr. David Alan Gilbert (git)" <address@hidden> wrote:
> From: "Dr. David Alan Gilbert" <address@hidden>
> Badly formatted migration streams can go undetected or produce
> misleading errors due to a lock of checking at the end of sections.
> In particular a section that adds an extra 0x00 at the end
> causes what looks like a normal end of stream and thus doesn't produce
> any errors, and something that ends in a 0x01..0x04 kind of look
> like real section headers and then fail when the section parser tries
> to figure out which section they are.  This is made worse by the
> choice of 0x00..0x04 being small numbers that are particularly common
> in normal section data.
> This patch adds a section footer consisting of a marker (0x7e - ~)
> followed by the section-id that was also sent in the header.  If
> they mismatch then it throws an error explaining which section was
> being loaded.
> Signed-off-by: Dr. David Alan Gilbert <address@hidden>

Reviewed-by: Juan Quintela <address@hidden>

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