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authorMarcelo Tosatti <mtosatti@redhat.com>2009-10-17 22:47:23 -0300
committerAvi Kivity <avi@redhat.com>2009-12-03 09:32:19 +0200
commitcd5a2685de4a642fd0bd763e8c19711ef08dbe27 (patch)
tree171f7b992801a61aa8655414c19c82a1042a30d4 /virt
parent6be7d3062b59af891be7e40c6802350de5f78cef (diff)
downloadvexpress-lsk-cd5a2685de4a642fd0bd763e8c19711ef08dbe27.tar.gz
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>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/irq_comm.c7
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;
}