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Re: [Xen-devel] [PATCH v2] libxl: Fix bug in libxl_cdrom_insert, make more robust against bad xenstore data



On Fri, 2012-11-23 at 14:40 +0000, George Dunlap wrote:
> # HG changeset patch
> # User George Dunlap <george.dunlap@xxxxxxxxxxxxx>
> # Date 1353681608 0
> # Node ID 54d1bcd211d14cfbae0782f2bf04f8942c2eb726
> # Parent  ae6fb202b233af815466055d9f1a635802a50855
> libxl: Fix bug in libxl_cdrom_insert, make more robust against bad xenstore 
> data
> 
> libxl_cdrom_insert was failing to initialize the backend type,
> resulting in the wrong default backend.  The result was not only that
> the CD was not inserted properly, but also that some improper xenstore
> entries were created, causing further block commands to fail.
> 
> This patch fixes the bug by setting the disk backend type based on the
> type of the existing device.
> 
> It also makes the system more robust by checking to see that it has
> got a valid path before proceeding to write a partial xenstore entry.
> 
> v2:
>  - Remove the checks on read, pending a more robust fix in another patch.
> 
> Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

Acked + applied. Thanks.



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