Re: [Xen-devel] XSA-155 and XSA-157 fixes missing from some stable Linux trees

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 16.03.16 at 10:35, <jslaby@xxxxxxx> wrote:
> On 03/16/2016, 10:25 AM, Jan Beulich wrote:
>> Hello,
>> 
>> it's been puzzling me for a while that these fixes, despite having the
>> necessary Cc, did not make it into (at least) 4.1.y and 3.12.y yet.
>> Unless there's a specific reason, may I ask for inclusion of
>> 
>> CVE-2015-8550 / XSA-155:
>> 
>> 454d5d882c xen: Add RING_COPY_REQUEST()
>> 0f589967a7 xen-netback: don't use last request to determine minimum Tx credit
> 
> Applied these two to 3.12. W/ slight update of the latter.
> 
>> 68a33bfd84 xen-netback: use RING_COPY_REQUEST() throughout
> 
> This does not apply cleanly and needs a backport. So I stopped here.

I'd defer to the maintainers of that code for doing so.

The subsequent ones are independent of this though, so it would
seem possible/reasonable to apply some or all of those that don't
require backports even if the one above doesn't apply cleanly.
Iirc at least the scsiback one might also need a backport, but that
again wouldn't hinder the pciback ones going in.

>> 1f13d75ccb xen-blkback: only read request operation from shared ring once
>> 1877914910 xen-blkback: read from indirect descriptors only once
>> be69746ec1 xen-scsiback: safely copy requests
>> 8135cf8b092 xen/pciback: Save xen_pci_op commands before processing it
>> 
>> plus the follow-up fix
>> 
>> d159457b84 xen/pciback: Save the number of MSI-X entries to be copied later.
> 
> 
> 
>> CVE-2015-8551, CVE-2015-8552 / XSA-157:
> 
> The fixes for this one applied all cleanly, applied to 3.12.

Thanks!

Jan


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