This is a note to let you know that I've just added the patch titled
KVM: nVMX: kmap() can't fail
to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: kvm-nvmx-kmap-can-t-fail.patch and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From 42cf014d38d8822cce63703a467e00f65d000952 Mon Sep 17 00:00:00 2001
From: David Hildenbrand david@redhat.com Date: Wed, 25 Jan 2017 11:58:57 +0100 Subject: KVM: nVMX: kmap() can't fail
From: David Hildenbrand david@redhat.com
commit 42cf014d38d8822cce63703a467e00f65d000952 upstream.
kmap() can't fail, therefore it will always return a valid pointer. Let's just get rid of the unnecessary checks.
Signed-off-by: David Hildenbrand david@redhat.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/x86/kvm/vmx.c | 9 --------- 1 file changed, 9 deletions(-)
--- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4756,10 +4756,6 @@ static int vmx_complete_nested_posted_in return 0;
vapic_page = kmap(vmx->nested.virtual_apic_page); - if (!vapic_page) { - WARN_ON(1); - return -ENOMEM; - } __kvm_apic_update_irr(vmx->nested.pi_desc->pir, vapic_page); kunmap(vmx->nested.virtual_apic_page);
@@ -9584,11 +9580,6 @@ static inline bool nested_vmx_merge_msr_ if (!page) return false; msr_bitmap_l1 = (unsigned long *)kmap(page); - if (!msr_bitmap_l1) { - nested_release_page_clean(page); - WARN_ON(1); - return false; - }
memset(msr_bitmap_l0, 0xff, PAGE_SIZE);
Patches currently in stable-queue which might be from david@redhat.com are
queue-4.9/kvm-nvmx-eliminate-vmcs02-pool.patch queue-4.9/kvm-nvmx-vmx_complete_nested_posted_interrupt-can-t-fail.patch queue-4.9/kvm-nvmx-kmap-can-t-fail.patch