From: Oleg Nesterov Date: Mon, 21 Apr 2014 13:26:01 +0000 (+0200) Subject: KVM: async_pf: mm->mm_users can not pin apf->mm X-Git-Tag: omap-for-v3.16/pm-signed~20^2~1 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41c22f626254b9dc0376928cae009e73d1b6a49a;p=pandora-kernel.git 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 Cc: stable@vger.kernel.org Signed-off-by: Paolo Bonzini --- Reading git-diff-tree failed