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| author | Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> | 2010-12-16 01:41:37 +0900 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:30:55 +0200 |
| commit | 175504cdbfef6a0fde3bafb6c38b4929049ac8ea (patch) | |
| tree | f5d56514b496e2d186d429c0cd5570026cffd5be /arch/x86/kvm/x86.c | |
| parent | a355c85c5f137d93c4e9274c50e26c20f1ebc1c9 (diff) | |
| download | lwn-175504cdbfef6a0fde3bafb6c38b4929049ac8ea.tar.gz lwn-175504cdbfef6a0fde3bafb6c38b4929049ac8ea.zip | |
KVM: Take missing slots_lock for kvm_io_bus_unregister_dev()
In KVM_CREATE_IRQCHIP, kvm_io_bus_unregister_dev() is called without taking
slots_lock in the error handling path.
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index cbaea7dd5963..f569da8ff839 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3309,8 +3309,10 @@ long kvm_arch_vm_ioctl(struct file *filp, if (vpic) { r = kvm_ioapic_init(kvm); if (r) { + mutex_lock(&kvm->slots_lock); kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &vpic->dev); + mutex_unlock(&kvm->slots_lock); kfree(vpic); goto create_irqchip_unlock; } @@ -3321,10 +3323,12 @@ long kvm_arch_vm_ioctl(struct file *filp, smp_wmb(); r = kvm_setup_default_irq_routing(kvm); if (r) { + mutex_lock(&kvm->slots_lock); mutex_lock(&kvm->irq_lock); kvm_ioapic_destroy(kvm); kvm_destroy_pic(kvm); mutex_unlock(&kvm->irq_lock); + mutex_unlock(&kvm->slots_lock); } create_irqchip_unlock: mutex_unlock(&kvm->lock); |