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

Michael Kelley
2019-05-07T12:51:56Z

From: Dexuan Cui <decui@microsoft.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@vger.kernel.org
> Cc: Michael Kelley <mikelley@microsoft.com>
> Reported-and-tested-by: Juliana Rodrigueiro <juliana.rodrigueiro@intra2net.com>
> Signed-off-by: Dexuan Cui <decui@microsoft.com>

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