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authorDexuan Cui <decui@microsoft.com>2019-05-07 07:46:55 +0000
committerSasha Levin <sashal@kernel.org>2019-08-20 12:49:57 -0400
commita9fc4340aee041dd186d1fb8f1b5d1e9caf28212 (patch)
tree306ef60e4cfe64f9a058dba56de7f402fc12dcf9 /drivers
parent89eb4d8d25722a0a0194cf7fa47ba602e32a6da7 (diff)
downloadlinux-a9fc4340aee041dd186d1fb8f1b5d1e9caf28212.tar.bz2
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: 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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hv/channel.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 5f9505a087f6..23f358cb7f49 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -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)) +