linux-kernel - Re: [PATCH 6/5] KVM: x86: fix periodic lapic timer with hrtimers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 25 Oct 2016 13:55:55 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Radim Krčmář <rkrcmar@...hat.com>,
        Wanpeng Li <kernellwp@...il.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        kvm <kvm@...r.kernel.org>,
        Yunhong Jiang <yunhong.jiang@...el.com>,
        Wanpeng Li <wanpeng.li@...mail.com>
Subject: Re: [PATCH 6/5] KVM: x86: fix periodic lapic timer with hrtimers



On 25/10/2016 13:43, Radim Krčmář wrote:
> Oops, silly mistake -- apic_timer_expired() was in the 'else' branch in
> [5/5] and I didn't invert the condition after moving it.
> 
> diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
> index 6244988418be..d7e74c8ec8ca 100644
> --- a/arch/x86/kvm/lapic.c
> +++ b/arch/x86/kvm/lapic.c
> @@ -1354,8 +1354,8 @@ static void start_sw_period(struct kvm_lapic *apic)
>  		return;
>  
>  	if (apic_lvtt_oneshot(apic) &&
> -	    ktime_after(apic->lapic_timer.target_expiration,
> -	                apic->lapic_timer.timer.base->get_time())) {
> +	    !ktime_after(apic->lapic_timer.target_expiration,
> +	                 apic->lapic_timer.timer.base->get_time())) {
>  		apic_timer_expired(apic);
>  		return;
>  	}
> 
> Paolo, can you squash that?

Yes, will do.

Paolo