Re: [Xen-devel] Xen 4.0.0x allows for data corruption in Dom0

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> "Jan Beulich" <JBeulich@xxxxxxxxxx> 09.03.10 10:37 >>>
>How about these being vcpu_time_info structures? The fields
>appear to all make sense. The only thing not matching this would
>be a few differently looking corruption entries sent earlier by Joanna,
>so this may not be the only thing. But it would explain why with 3.4.2
>the issue is not present.

In particular I think the update_vcpu_system_time() invocation 
in schedule() isn't right - VCPUOP_register_vcpu_time_memory_area
taking a virtual address, this call must not happen before
context_switch().

And btw., 32-on-64 also seems to be broken for
VCPUOP_register_vcpu_time_memory_area (since 64-bit Xen reads
the full 64-bit field).

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel