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[Xen-devel] do_iret bug in xen
"do_iret" (slow iret via hyercall) can introduce a race condition as "current" can change during the execution of the function. all hypercalls run with "sti" on, so an interrupt on a processor causing the control to enter in "__enter_scheduler" after reading current can change the current process on that processor.
struct iret_context iret_saved;
struct vcpu *v = current;
if ( unlikely(copy_from_user(&iret_saved, (void *)regs->rsp,
Any thoughts on this?
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