From: Dexuan Cui decui@microsoft.com
commit a9fc4340aee041dd186d1fb8f1b5d1e9caf28212 upstream.
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 Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/hv/channel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -38,7 +38,7 @@
static unsigned long virt_to_hvpfn(void *addr) { - unsigned long paddr; + phys_addr_t paddr;
if (is_vmalloc_addr(addr)) paddr = page_to_phys(vmalloc_to_page(addr)) +