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[S390] KVM: Read buffer overflow

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Check whether index is within bounds before testing the element.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Roel Kluin 2009-08-07 10:39:25 +02:00 committed by Martin Schwidefsky
parent 677c1dd706
commit 53cb780adb
1 changed files with 4 additions and 3 deletions
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7
arch/s390/kvm/sigp.c
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@ -169,7 +169,7 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
unsigned long *reg)
{
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
struct kvm_s390_local_interrupt *li;
struct kvm_s390_local_interrupt *li = NULL;
struct kvm_s390_interrupt_info *inti;
int rc;
u8 tmp;
@ -189,9 +189,10 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
return 2; /* busy */
spin_lock(&fi->lock);
li = fi->local_int[cpu_addr];
if (cpu_addr < KVM_MAX_VCPUS)
li = fi->local_int[cpu_addr];
if ((cpu_addr >= KVM_MAX_VCPUS) || (li == NULL)) {
if (li == NULL) {
rc = 1; /* incorrect state */
*reg &= SIGP_STAT_INCORRECT_STATE;
kfree(inti);