[PATCH v1 02/11] KVM: s390: Use srcu in kvm_arch_vcpu_unlocked_ioctl()
Claudio Imbrenda <[email protected]>
| Newsgroups | org.kernel.vger.linux-s390,org.kernel.vger.kvm,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <[email protected]> |
kvm_arch_vcpu_unlocked_ioctl() is called without further locks held, but
kvm_s390_inject_vcpu(), which is called from there, needs either the
kvm->srcu or the slots lock.
Fix by taking the kvm->srcu in kvm_arch_vcpu_unlocked_ioctl().
Fixes: ba5c1e9b6cee ("KVM: s390: interrupt subsystem, cpu timer, waitpsw")
Signed-off-by: Claudio Imbrenda <[email protected]>
---
arch/s390/kvm/kvm-s390.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 518a69c55e85..02c5428ba239 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -5444,6 +5444,8 @@ long kvm_arch_vcpu_unlocked_ioctl(struct file *filp, unsigned int ioctl,
void __user *argp = (void __user *)arg;
int rc;
+ guard(srcu)(&vcpu->kvm->srcu);
+
switch (ioctl) {
case KVM_S390_IRQ: {
struct kvm_s390_irq s390irq;
--
2.55.0