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Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE 

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: 6ba34171bc ("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>
This commit is contained in:
Dexuan Cui 2019-05-07 07:46:55 +00:00 committed by Sasha Levin
parent 89eb4d8d25
commit a9fc4340ae
1 changed files with 1 additions and 1 deletions
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2
drivers/hv/channel.c
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@ -26,7 +26,7 @@
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)) +