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OpenCloudOS-Kernel
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KVM: Fix off-by-one in overflow check of KVM_ASSIGN_SET_MSIX_NR 

KVM_MAX_MSIX_PER_DEV implies that up to that many MSI-X entries can be
requested. But the kernel so far rejected already the upper limit.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka 2011-06-11 12:23:55 +02:00 committed by Avi Kivity
parent 1dda606c5f
commit 9f3191aec5
1 changed files with 1 additions and 1 deletions
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2
virt/kvm/assigned-dev.c
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@ -617,7 +617,7 @@ static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm,
if (adev->entries_nr == 0) { if (adev->entries_nr == 0) {
adev->entries_nr = entry_nr->entry_nr; adev->entries_nr = entry_nr->entry_nr;
if (adev->entries_nr == 0 || if (adev->entries_nr == 0 ||
adev->entries_nr >= KVM_MAX_MSIX_PER_DEV) { adev->entries_nr > KVM_MAX_MSIX_PER_DEV) {
r = -EINVAL; r = -EINVAL;
goto msix_nr_out; goto msix_nr_out;
} }