Oleg Nesterov 41c22f6262 KVM: async_pf: mm->mm_users can not pin apf->mm ... 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 this case looks fine at first glance, it seems that this ->mm is only used to verify that current->mm == kvm->mm. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2014-04-28 13:04:46 +02:00
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kvm	KVM: async_pf: mm->mm_users can not pin apf->mm	2014-04-28 13:04:46 +02:00