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KVM: Return directly after a failed copy_from_user() in kvm_vm_compat_ioctl()

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* Return directly after a call of the function "copy_from_user" failed
  in a case block.

  This issue was detected by using the Coccinelle software.

* Delete the jump label "out" which became unnecessary with
  this refactoring.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Markus Elfring 2017-01-22 11:30:21 +01:00 committed by Paolo Bonzini
parent bd7e5b0899
commit f6a3b168e5
1 changed files with 1 additions and 4 deletions
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5
virt/kvm/kvm_main.c
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@ -3148,10 +3148,9 @@ static long kvm_vm_compat_ioctl(struct file *filp,
struct compat_kvm_dirty_log compat_log;
struct kvm_dirty_log log;
r = -EFAULT;
if (copy_from_user(&compat_log, (void __user *)arg,
sizeof(compat_log)))
goto out;
return -EFAULT;
log.slot = compat_log.slot;
log.padding1 = compat_log.padding1;
log.padding2 = compat_log.padding2;
@ -3163,8 +3162,6 @@ static long kvm_vm_compat_ioctl(struct file *filp,
default:
r = kvm_vm_ioctl(filp, ioctl, arg);
}
out:
return r;
}
#endif