From 8018c27b26af56af18eb8b2dc600eba825792d8f Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Fri, 29 Dec 2006 16:50:01 -0800 Subject: [PATCH] kvm: fix GFP_KERNEL allocation in atomic section in kvm_dev_ioctl_create_vcpu() fix an GFP_KERNEL allocation in atomic section: kvm_dev_ioctl_create_vcpu() called kvm_mmu_init(), which calls alloc_pages(), while holding the vcpu. The fix is to set up the MMU state in two phases: kvm_mmu_create() and kvm_mmu_setup(). (NOTE: free_vcpus does an kvm_mmu_destroy() call so there's no need for any extra teardown branch on allocation/init failure here.) Signed-off-by: Ingo Molnar Cc: Avi Kivity Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/kvm/kvm_main.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'drivers/kvm/kvm_main.c') diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 973544553cba..ce7fe640f18d 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -522,12 +522,14 @@ static int kvm_dev_ioctl_create_vcpu(struct kvm *kvm, int n) if (r < 0) goto out_free_vcpus; - kvm_arch_ops->vcpu_load(vcpu); + r = kvm_mmu_create(vcpu); + if (r < 0) + goto out_free_vcpus; - r = kvm_arch_ops->vcpu_setup(vcpu); + kvm_arch_ops->vcpu_load(vcpu); + r = kvm_mmu_setup(vcpu); if (r >= 0) - r = kvm_mmu_init(vcpu); - + r = kvm_arch_ops->vcpu_setup(vcpu); vcpu_put(vcpu); if (r < 0) -- cgit v1.2.3