[Bug 65561] KVM:Entry failed on Single stepping sti instruction

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=65561

--- Comment #24 from Jatin Kumar <jatin.iitdelhi@gmail.com> ---
> linux:~/code/cvedr # ./accessmsr
> Segmentation fault
You got a seg fault because it is privileged instruction and I run it in kernel
mode not user mode. But you are likely to be running your program in user mode.
Try something like out instruction.

> Even though my c program in the guest os got a segmentation fault, from the
> host os level, I don't see the printk statement is triggered, so this is not
> about privileged instructions or unprivileged instructions. I think there
> must be some other conditions to trigger these printk statements.
After getting the VM_EXIT it must be first checking if it requires to emulate
or should generate a fault. In this case it would have generated the fault
without emulating it.

Again, you can try it with 'out' instruction.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.