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linux/arch/x86/kvm
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Sean Christopherson 2aa078932f KVM: x86/mmu: Use -1 to flag an undefined spte in get_mmio_spte() 
Return -1 from the get_walk() helpers if the shadow walk doesn't fill at
least one spte, which can theoretically happen if the walk hits a
not-present PDPTR.  Returning the root level in such a case will cause
get_mmio_spte() to return garbage (uninitialized stack data).  In
practice, such a scenario should be impossible as KVM shouldn't get a
reserved-bit page fault with a not-present PDPTR.

Note, using mmu->root_level in get_walk() is wrong for other reasons,
too, but that's now a moot point.

Fixes: 95fb5b0258b7 ("kvm: x86/mmu: Support MMIO in the TDP MMU")
Cc: Ben Gardon <bgardon@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20201218003139.2167891-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-01-07 18:00:23 -05:00
..
mmu
KVM: x86/mmu: Use -1 to flag an undefined spte in get_mmio_spte()
2021-01-07 18:00:23 -05:00
svm
kvm: svm: de-allocate svm_cpu_data for all cpus in svm_cpu_uninit()
2020-12-04 03:47:58 -05:00
vmx
KVM: vmx: remove unused variable
2020-10-31 11:38:43 -04:00
cpuid.c
Fixes for ARM and x86, the latter especially for old processors
2020-11-15 09:57:58 -08:00
cpuid.h
kvm: x86: ensure pv_cpuid.features is initialized when enabling cap
2020-11-08 04:41:29 -05:00
debugfs.c
KVM: let kvm_destroy_vm_debugfs clean up vCPU debugfs directories
2020-06-04 11:00:54 -04:00
emulate.c
KVM: x86: clflushopt should be treated as a no-op by emulation
2020-11-13 06:28:33 -05:00
hyperv.c
ARM:
2020-10-23 11:17:56 -07:00
hyperv.h
x86/kvm/hyper-v: Add support for synthetic debugger interface
2020-06-01 04:26:11 -04:00
i8254.c
kvm: i8254: remove redundant assignment to pointer s
2020-06-11 12:35:18 -04:00
i8254.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
i8259.c
KVM: x86: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks
2020-01-27 19:59:37 +01:00
ioapic.c
KVM: ioapic: break infinite recursion on lazy EOI
2020-10-24 04:42:06 -04:00
ioapic.h
kvm/x86: Remove redundant function implementations
2020-05-27 13:11:10 -04:00
irq_comm.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
irq.c
KVM: x86: Fix split-irqchip vs interrupt injection window request
2020-11-27 09:27:28 -05:00
irq.h
kvm/x86: Remove redundant function implementations
2020-05-27 13:11:10 -04:00
Kconfig
x86/kvm: hide KVM options from menuconfig when KVM is not compiled
2020-10-21 17:36:30 -04:00
kvm_cache_regs.h
KVM: x86: Let the guest own CR4.FSGSBASE
2020-10-21 17:48:50 -04:00
kvm_emulate.h
ARM:
2020-04-02 15:13:15 -07:00
lapic.c
KVM: x86: handle !lapic_in_kernel case in kvm_cpu_*_extint
2020-11-27 09:19:52 -05:00
lapic.h
KVM: nVMX: Morph notification vector IRQ on nested VM-Enter to pending PI
2020-09-28 07:57:22 -04:00
Makefile
kvm: x86/mmu: Init / Uninit the TDP MMU
2020-10-21 18:17:00 -04:00
mmu.h
KVM: x86: Move illegal GPA helper out of the MMU code
2020-09-28 07:57:27 -04:00
mtrr.c
KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks
2020-01-27 19:59:39 +01:00
pmu.c
KVM/x86: pmu: Fix #GP condition check for RDPMC emulation
2020-07-09 07:08:37 -04:00
pmu.h
kvm: x86: limit the maximum number of vPMU fixed counters to 3
2020-07-08 16:21:59 -04:00
trace.h
KVM: x86: Use common definition for kvm_nested_vmexit tracepoint
2020-09-28 07:57:52 -04:00
tss.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
x86.c
KVM: x86: Fix split-irqchip vs interrupt injection window request
2020-11-27 09:27:28 -05:00
x86.h
KVM: x86: use positive error values for msr emulation that causes #GP
2020-11-08 04:41:28 -05:00