This is a note to let you know that I've just added the patch titled
[PATCH BACKPORT 3.17-4.4 3/4] MIPS: KVM: Fix gfn range check in kseg0 tlb faults
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mips-kvm-fix-gfn-range-check-in-kseg0-tlb-faults.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From james.hogan@xxxxxxxxxx Thu Aug 18 11:44:51 2016
From: James Hogan <james.hogan@xxxxxxxxxx>
Date: Thu, 18 Aug 2016 10:05:31 +0100
Subject: [PATCH BACKPORT 3.17-4.4 3/4] MIPS: KVM: Fix gfn range check in kseg0 tlb faults
To: <stable@xxxxxxxxxxxxxxx>
Cc: James Hogan <james.hogan@xxxxxxxxxx>, Paolo Bonzini <pbonzini@xxxxxxxxxx>, Radim Krčmář <rkrcmar@xxxxxxxxxx>, Ralf Baechle <ralf@xxxxxxxxxxxxxx>, <linux-mips@xxxxxxxxxxxxxx>, <kvm@xxxxxxxxxxxxxxx>
Message-ID: <2c09ac935cd3721a0212d82eca7f9290481d5b4c.1471018436.git-series.james.hogan@xxxxxxxxxx>
From: James Hogan <james.hogan@xxxxxxxxxx>
commit 0741f52d1b980dbeb290afe67d88fc2928edd8ab upstream.
Two consecutive gfns are loaded into host TLB, so ensure the range check
isn't off by one if guest_pmap_npages is odd.
Fixes: 858dd5d45733 ("KVM/MIPS32: MMU/TLB operations for the Guest.")
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: "Radim Krčmář" <rkrcmar@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: linux-mips@xxxxxxxxxxxxxx
Cc: kvm@xxxxxxxxxxxxxxx
Signed-off-by: Radim Krčmář <rkrcmar@xxxxxxxxxx>
[james.hogan@xxxxxxxxxx: Backport to v3.17.y - v4.4.y]
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/kvm/tlb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/mips/kvm/tlb.c
+++ b/arch/mips/kvm/tlb.c
@@ -276,7 +276,7 @@ int kvm_mips_handle_kseg0_tlb_fault(unsi
}
gfn = (KVM_GUEST_CPHYSADDR(badvaddr) >> PAGE_SHIFT);
- if (gfn >= kvm->arch.guest_pmap_npages) {
+ if ((gfn | 1) >= kvm->arch.guest_pmap_npages) {
kvm_err("%s: Invalid gfn: %#llx, BadVaddr: %#lx\n", __func__,
gfn, badvaddr);
kvm_mips_dump_host_tlbs();
Patches currently in stable-queue which might be from james.hogan@xxxxxxxxxx are
queue-4.4/mips-kvm-add-missing-gfn-range-check.patch
queue-4.4/mips-kvm-propagate-kseg0-mapped-tlb-fault-errors.patch
queue-4.4/mips-kvm-fix-mapped-fault-broken-commpage-handling.patch
queue-4.4/mips-kvm-fix-gfn-range-check-in-kseg0-tlb-faults.patch
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