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KVM: ARM/arm64: return -EFAULT if copy_from_user fails in set_timer_reg

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We currently return the number of bytes not copied if set_timer_reg
fails, which is almost certainly not what userspace would like.

This patch returns -EFAULT instead.

Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Will Deacon 2014-08-26 15:13:23 +01:00 • committed by Christoffer Dall
parent 18d457661f
commit bd218bce92
2 changed files with 2 additions and 2 deletions
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2
arch/arm/kvm/guest.c
View file

@ -163,7 +163,7 @@ static int set_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
ret = copy_from_user(&val, uaddr, KVM_REG_SIZE(reg->id)); ret = copy_from_user(&val, uaddr, KVM_REG_SIZE(reg->id));
if (ret != 0) if (ret != 0)
return ret; return -EFAULT;
return kvm_arm_timer_set_reg(vcpu, reg->id, val); return kvm_arm_timer_set_reg(vcpu, reg->id, val);
} }

2
arch/arm64/kvm/guest.c
View file

@ -174,7 +174,7 @@ static int set_timer_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg)
ret = copy_from_user(&val, uaddr, KVM_REG_SIZE(reg->id)); ret = copy_from_user(&val, uaddr, KVM_REG_SIZE(reg->id));
if (ret != 0) if (ret != 0)
return ret; return -EFAULT;
return kvm_arm_timer_set_reg(vcpu, reg->id, val); return kvm_arm_timer_set_reg(vcpu, reg->id, val);
} }