linux-kernel - Re: [PATCH] kvm: irqchip: fix memory leak

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Date:	Mon, 7 Sep 2015 22:06:18 +0200
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Gleb Natapov <gleb@...nel.org>
Cc:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH] kvm: irqchip: fix memory leak



On 02/09/2015 09:03, Sudip Mukherjee wrote:
> We were taking the exit path after checking ue->flags and return value
> of setup_routing_entry(), but 'e' was not freed incase of a failure.
> 
> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> ---
>  virt/kvm/irqchip.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/virt/kvm/irqchip.c b/virt/kvm/irqchip.c
> index 21c1424..c63e54f 100644
> --- a/virt/kvm/irqchip.c
> +++ b/virt/kvm/irqchip.c
> @@ -213,11 +213,15 @@ int kvm_set_irq_routing(struct kvm *kvm,
>  			goto out;
>  
>  		r = -EINVAL;
> -		if (ue->flags)
> +		if (ue->flags) {
> +			kfree(e);
>  			goto out;
> +		}
>  		r = setup_routing_entry(new, e, ue);
> -		if (r)
> +		if (r) {
> +			kfree(e);
>  			goto out;
> +		}
>  		++ue;
>  	}
>  
> 

Queued, thanks.

Paolo
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