diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-10-17 22:47:23 -0300 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-12-03 09:32:19 +0200 |
| commit | cd5a2685de4a642fd0bd763e8c19711ef08dbe27 (patch) | |
| tree | 171f7b992801a61aa8655414c19c82a1042a30d4 | |
| parent | 6be7d3062b59af891be7e40c6802350de5f78cef (diff) | |
KVM: fix irq_source_id size verification
find_first_zero_bit works with bit numbers, not bytes.
Fixes
https://sourceforge.net/tracker/?func=detail&aid=2847560&group_id=180599&atid=893831
Reported-by: "Xu, Jiajun" <jiajun.xu@intel.com>
Cc: stable@kernel.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| -rw-r--r-- | virt/kvm/irq_comm.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 00c68d29857..0d454d35271 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -215,10 +215,9 @@ int kvm_request_irq_source_id(struct kvm *kvm) int irq_source_id; mutex_lock(&kvm->irq_lock); - irq_source_id = find_first_zero_bit(bitmap, - sizeof(kvm->arch.irq_sources_bitmap)); + irq_source_id = find_first_zero_bit(bitmap, BITS_PER_LONG); - if (irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) { + if (irq_source_id >= BITS_PER_LONG) { printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n"); irq_source_id = -EFAULT; goto unlock; @@ -240,7 +239,7 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id) mutex_lock(&kvm->irq_lock); if (irq_source_id < 0 || - irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) { + irq_source_id >= BITS_PER_LONG) { printk(KERN_ERR "kvm: IRQ source ID out of range!\n"); goto unlock; } |