linux-kernel - RE: [PATCH] Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86

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Message-ID: <DM5PR2101MB09188A7DB0777CD50333F94ED7310@DM5PR2101MB0918.namprd21.prod.outlook.com>
Date:   Tue, 7 May 2019 12:51:51 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     Dexuan Cui <decui@...rosoft.com>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "sashal@...nel.org" <sashal@...nel.org>,
        Sasha Levin <Alexander.Levin@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "juliana.rodrigueiro@...ra2net.com" 
        <juliana.rodrigueiro@...ra2net.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "marcelo.cerri@...onical.com" <marcelo.cerri@...onical.com>,
        "apw@...onical.com" <apw@...onical.com>,
        "olaf@...fle.de" <olaf@...fle.de>, vkuznets <vkuznets@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH] Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE

From: Dexuan Cui <decui@...rosoft.com> Sent: Tuesday, May 7, 2019 12:47 AM
> 
> In the case of X86_PAE, unsigned long is u32, but the physical address type
> should be u64. Due to the bug here, the netvsc driver can not load
> successfully, and sometimes the VM can panic due to memory corruption (the
> hypervisor writes data to the wrong location).
> 
> Fixes: 6ba34171bcbd ("Drivers: hv: vmbus: Remove use of slow_virt_to_phys()")
> Cc: stable@...r.kernel.org
> Cc: Michael Kelley <mikelley@...rosoft.com>
> Reported-and-tested-by: Juliana Rodrigueiro <juliana.rodrigueiro@...ra2net.com>
> Signed-off-by: Dexuan Cui <decui@...rosoft.com>

Reviewed-by:  Michael Kelley <mikelley@...rosoft.com>