Re: [PATCH] Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE

From: Sasha Levin
Date: Wed May 08 2019 - 21:07:10 EST


On Tue, May 07, 2019 at 12:51:51PM +0000, Michael Kelley wrote:
From: Dexuan Cui <decui@xxxxxxxxxxxxx> 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@xxxxxxxxxxxxxxx
Cc: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Reported-and-tested-by: Juliana Rodrigueiro <juliana.rodrigueiro@xxxxxxxxxxxxx>
Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx>

Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>

Queued for hyperv-fixes, thanks!

--
Thanks,
Sasha