2015-09-15 18:09 GMT+02:00 Andrew Cooper <andrew.cooper3@citrix.com>:I don't know why, but only one vm seems to be affected (and they all are built the same way).
The instantiation of HYPERVISOR_update_va_mapping() in set_aliased_prot() has always been buggy in pvops kernels.
This bug should be fixed by c/s 0b0e55 "x86/xen: Probe target addresses in set_aliased_prot before the hypercall" which is in the process of being backported to #stable as a prerequisite for the recent LDT CVE fixes.
~Andrew
OK thanks, I will stick with the 3.2 kernel for the moment, it seems to work with it.