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Maxim Levitsky 9444462d63 KVM: x86: fix typo in __try_cmpxchg_user causing non-atomicness 
commit 33fbe6befa622c082f7d417896832856814bdde0 upstream.

This shows up as a TDP MMU leak when running nested.  Non-working cmpxchg on L0
relies makes L1 install two different shadow pages under same spte, and one of
them is leaked.

Fixes: 1c2361f667f36 ("KVM: x86: Use __try_cmpxchg_user() to emulate atomic accesses")
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20220512101420.306759-1-mlevitsk@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-07-29 17:25:33 +02:00
..
mmu
KVM: use __vcalloc for very large allocations
2022-07-12 16:35:02 +02:00
svm
x86: Add magic AMD return-thunk
2022-07-23 12:54:01 +02:00
vmx
x86/speculation: Fill RSB on vmexit for IBRS
2022-07-23 12:54:09 +02:00
cpuid.c
kvm: x86/cpuid: Only provide CPUID leaf 0xA if host has architectural PMU
2022-05-12 12:30:22 +02:00
cpuid.h
KVM: x86: Move reverse CPUID helpers to separate header file
2021-04-26 05:27:13 -04:00
debugfs.c
KVM: x86: Check for rmaps allocation
2022-01-11 15:35:15 +01:00
emulate.c
KVM: emulate: do not adjust size of fastop and setcc subroutines
2022-07-23 12:54:13 +02:00
fpu.h
KVM: x86: Move FPU register accessors into fpu.h
2021-06-17 13:09:24 -04:00
hyperv.c
KVM: x86: Forbid VMM to set SYNIC/STIMER MSRs when SynIC wasn't activated
2022-04-08 14:24:07 +02:00
hyperv.h
KVM: x86: Query vcpu->vcpu_idx directly and drop its accessor
2021-09-22 10:33:11 -04:00
i8254.c
KVM: x86: Migrate the PIT only if vcpu0 is migrated, not any BSP
2021-08-02 11:01:51 -04:00
i8254.h
…
i8259.c
x86: Fix typo s/ECLR/ELCR/ for the PIC register
2021-08-10 23:31:44 +02:00
ioapic.c
Revert "x86/kvm: fix vcpu-id indexed array sizes"
2021-11-12 15:05:47 +01:00
ioapic.h
x86/kvm: remove unused ack_notifier callbacks
2021-12-22 09:32:34 +01:00
irq_comm.c
x86: Fix various typos in comments
2021-03-18 15:31:53 +01:00
irq.c
KVM: x86/xen: Add event channel interrupt vector upcall
2021-02-04 14:19:39 +00:00
irq.h
x86/kvm: remove unused ack_notifier callbacks
2021-12-22 09:32:34 +01:00
Kconfig
ARM:
2021-06-28 15:40:51 -07:00
kvm_cache_regs.h
KVM: x86: Introduce KVM_GET_SREGS2 / KVM_SET_SREGS2
2021-06-17 13:09:47 -04:00
kvm_emulate.h
KVM: x86/emulator: Emulate RDPID only if it is enabled in guest
2022-04-13 20:59:00 +02:00
kvm_onhyperv.c
KVM: x86: hyper-v: Move the remote TLB flush logic out of vmx
2021-06-17 13:09:36 -04:00
kvm_onhyperv.h
KVM: x86: hyper-v: Move the remote TLB flush logic out of vmx
2021-06-17 13:09:36 -04:00
lapic.c
KVM: LAPIC: Drop pending LAPIC timer injection when canceling the timer
2022-06-09 10:23:13 +02:00
lapic.h
KVM: x86: Add a return code to kvm_apic_accept_events
2021-06-17 13:09:31 -04:00
Makefile
KVM: stats: Add fd-based API to read binary stats data
2021-06-24 11:47:57 -04:00
mmu.h
KVM: x86: Reinitialize context if host userspace toggles EFER.LME
2022-04-08 14:24:03 +02:00
mtrr.c
KVM: x86: Add helper to consolidate "raw" reserved GPA mask calculations
2021-02-04 09:27:30 -05:00
pmu.c
KVM: x86/pmu: Fix and isolate TSX-specific performance event logic
2022-04-13 20:59:00 +02:00
pmu.h
KVM: x86/pmu: Update AMD PMC sample period to fix guest NMI-watchdog
2022-04-27 14:39:00 +02:00
reverse_cpuid.h
KVM: SEV: Mask CPUID[0x8000001F].eax according to supported features
2021-04-26 05:27:15 -04:00
trace.h
KVM: x86: Introduce trace_kvm_hv_hypercall_done()
2021-08-03 06:16:40 -04:00
tss.h
…
x86.c
KVM: x86: fix typo in __try_cmpxchg_user causing non-atomicness
2022-07-29 17:25:33 +02:00
x86.h
KVM: nVMX: Abide to KVM_REQ_TLB_FLUSH_GUEST request on nested vmentry/vmexit
2021-12-08 09:04:44 +01:00
xen.c
KVM: x86/xen: Fix runstate updates to be atomic when preempting vCPU
2022-02-23 12:03:07 +01:00
xen.h
KVM: xen: do not use struct gfn_to_hva_cache
2021-08-05 03:31:40 -04:00