From mboxrd@z Thu Jan  1 00:00:00 1970
From: Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>
Subject: Re: [PATCH 0/4] MIPS: KVM: Fix MMU/TLB management issues
Date: Fri, 12 Aug 2016 14:37:22 +0200
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References: <cover.e70247d7d77e67a2331e65b6b7fd3894508e5d28.1470911944.git-series.james.hogan@imgtec.com>
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Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org,
	kvm@vger.kernel.org, stable@vger.kernel.org
To: James Hogan <james.hogan@imgtec.com>
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2016-08-11 11:52+0100, James Hogan:
> These patches fix several issues in the management of MIPS KVM TLB
> faults:
> 
> 1) kvm_mips_handle_mapped_seg_tlb_fault() misbehaves for virtual address
>    zero, which can be hit if the guest creates such a mapping and
>    accesses it in a way unexpected for the commpage (e.g. a CACHE
>    instruction).
> 
> 2) kvm_mips_handle_mapped_seg_tlb_fault() doesn't range check the gfn,
>    allowing a high mapping by the guest to overflow the guest_pmap[].
> 
> 3) kvm_mips_handle_kseg0_tlb_fault() has an off by one in its gfn range
>    check, which could allow an odd sized guest_pmap[] to be overflowed.
> 
> 4) some callers of kvm_mips_handle_kseg0_tlb_fault() and
>    kvm_mips_handle_mapped_seg_tlb_fault() don't correctly propagate
>    errors upwards.
> 
> They're all marked for stable but won't apply cleanly before v4.8-rc1
> due to recent changes. I have backports ready though.

Applied, thanks.