diff options
| -rw-r--r-- | kernel/compat.c | 1 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 52 |
2 files changed, 52 insertions, 1 deletions
diff --git a/kernel/compat.c b/kernel/compat.c index fc9eb093acd5..18197ae2d465 100644 --- a/kernel/compat.c +++ b/kernel/compat.c @@ -890,6 +890,7 @@ sigset_from_compat (sigset_t *set, compat_sigset_t *compat) case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); } } +EXPORT_SYMBOL_GPL(sigset_from_compat); asmlinkage long compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index fa2321ac77cc..11d2783eb9df 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -84,6 +84,10 @@ struct dentry *kvm_debugfs_dir; static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, unsigned long arg); +#ifdef CONFIG_COMPAT +static long kvm_vcpu_compat_ioctl(struct file *file, unsigned int ioctl, + unsigned long arg); +#endif static int hardware_enable_all(void); static void hardware_disable_all(void); @@ -1586,7 +1590,9 @@ static int kvm_vcpu_release(struct inode *inode, struct file *filp) static struct file_operations kvm_vcpu_fops = { .release = kvm_vcpu_release, .unlocked_ioctl = kvm_vcpu_ioctl, - .compat_ioctl = kvm_vcpu_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = kvm_vcpu_compat_ioctl, +#endif .mmap = kvm_vcpu_mmap, .llseek = noop_llseek, }; @@ -1875,6 +1881,50 @@ out: return r; } +#ifdef CONFIG_COMPAT +static long kvm_vcpu_compat_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg) +{ + struct kvm_vcpu *vcpu = filp->private_data; + void __user *argp = compat_ptr(arg); + int r; + + if (vcpu->kvm->mm != current->mm) + return -EIO; + + switch (ioctl) { + case KVM_SET_SIGNAL_MASK: { + struct kvm_signal_mask __user *sigmask_arg = argp; + struct kvm_signal_mask kvm_sigmask; + compat_sigset_t csigset; + sigset_t sigset; + + if (argp) { + r = -EFAULT; + if (copy_from_user(&kvm_sigmask, argp, + sizeof kvm_sigmask)) + goto out; + r = -EINVAL; + if (kvm_sigmask.len != sizeof csigset) + goto out; + r = -EFAULT; + if (copy_from_user(&csigset, sigmask_arg->sigset, + sizeof csigset)) + goto out; + } + sigset_from_compat(&sigset, &csigset); + r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); + break; + } + default: + r = kvm_vcpu_ioctl(filp, ioctl, arg); + } + +out: + return r; +} +#endif + static long kvm_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { |