On 21/04/14 15:26, Oleg Nesterov wrote:
> get_user_pages(mm) is simply wrong if mm->mm_users == 0 and exit_mmap/etc
> was already called (or is in progress), mm->mm_count can only pin mm->pgd
> and mm_struct itself.
>
> Change kvm_setup_async_pf/async_pf_execute to inc/dec mm->mm_users.
>
> kvm_c
get_user_pages(mm) is simply wrong if mm->mm_users == 0 and exit_mmap/etc
was already called (or is in progress), mm->mm_count can only pin mm->pgd
and mm_struct itself.
Change kvm_setup_async_pf/async_pf_execute to inc/dec mm->mm_users.
kvm_create_vm/kvm_destroy_vm play with ->mm_count too but t
