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f83894b24c
linux/arch/x86/kvm
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Sean Christopherson f83894b24c KVM: x86: Fix handling of APIC LVT updates when userspace changes MCG_CAP 
Add a helper to update KVM's in-kernel local APIC in response to MCG_CAP
being changed by userspace to fix multiple bugs.  First and foremost,
KVM needs to check that there's an in-kernel APIC prior to dereferencing
vcpu->arch.apic.  Beyond that, any "new" LVT entries need to be masked,
and the APIC version register needs to be updated as it reports out the
number of LVT entries.

Fixes: 4b903561ec ("KVM: x86: Add Corrected Machine Check Interrupt (CMCI) emulation to lapic.")
Reported-by: syzbot+8cdad6430c24f396f158@syzkaller.appspotmail.com
Cc: Siddh Raman Pant <code@siddh.me>
Cc: Jue Wang <juew@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
2022-07-08 15:58:16 -07:00
..
mmu KVM: x86/mmu: Buffer nested MMU split_desc_cache only by default capacity 2022-06-25 04:54:51 -04:00
svm KVM: x86: nSVM: optimize svm_set_x2apic_msr_interception 2022-06-24 12:52:59 -04:00
vmx KVM: nVMX: clean up posted interrupt descriptor try_cmpxchg 2022-06-24 11:45:45 -04:00
cpuid.c KVM: x86: Introduce "struct kvm_caps" to track misc caps/settings 2022-06-08 05:21:16 -04:00
cpuid.h KVM: x86/cpuid: Refactor host/guest CPU model consistency check 2022-06-08 04:48:19 -04:00
debugfs.c KVM: x86: Introduce "struct kvm_caps" to track misc caps/settings 2022-06-08 05:21:16 -04:00
emulate.c KVM: x86: Bug the VM on an out-of-bounds data read 2022-06-10 10:01:34 -04:00
fpu.h KVM: x86: Move FPU register accessors into fpu.h 2021-06-17 13:09:24 -04:00
hyperv.c Bitmap patches for 5.19-rc1 2022-06-04 14:04:27 -07:00
hyperv.h KVM: x86: hyper-v: Avoid writing to TSC page without an active vCPU 2022-04-11 13:29:51 -04:00
i8254.c KVM: x86: PIT: Preserve state of speaker port data bit 2022-06-08 13:06:20 -04:00
i8254.h KVM: x86: PIT: Preserve state of speaker port data bit 2022-06-08 13:06:20 -04:00
i8259.c KVM: x86/i8259: Remove a dead store of irq in a conditional block 2022-04-02 05:41:19 -04:00
ioapic.c KVM: x86/ioapic: Remove unused "addr" and "length" of ioapic_read_indirect() 2022-02-10 13:47:13 -05:00
ioapic.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
irq_comm.c KVM: x86/xen: Make kvm_xen_set_evtchn() reusable from other places 2022-04-02 05:41:14 -04:00
irq.c KVM: x86/xen: handle PV timers oneshot mode 2022-04-02 05:41:16 -04:00
irq.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
Kconfig KVM: x86/mmu: Remove MMU auditing 2022-02-18 13:46:23 -05:00
kvm_cache_regs.h KVM: X86: Remove kvm_register_clear_available() 2021-12-08 04:25:03 -05:00
kvm_emulate.h KVM: x86: Bug the VM if the emulator accesses a non-existent GPR 2022-06-10 10:01:33 -04:00
kvm_onhyperv.c KVM: x86: Uninline and export hv_track_root_tdp() 2022-02-10 13:47:19 -05:00
kvm_onhyperv.h KVM: x86: Uninline and export hv_track_root_tdp() 2022-02-10 13:47:19 -05:00
lapic.c KVM: x86: Fix handling of APIC LVT updates when userspace changes MCG_CAP 2022-07-08 15:58:16 -07:00
lapic.h KVM: x86: Fix handling of APIC LVT updates when userspace changes MCG_CAP 2022-07-08 15:58:16 -07:00
Makefile KVM: Add Makefile.kvm for common files, use it for x86 2021-12-09 12:56:02 -05:00
mmu.h KVM: x86/mmu: Use separate namespaces for guest PTEs and shadow PTEs 2022-06-20 06:21:28 -04:00
mtrr.c KVM: x86: Add helper to consolidate "raw" reserved GPA mask calculations 2021-02-04 09:27:30 -05:00
pmu.c Revert "KVM: x86: always allow host-initiated writes to PMU MSRs" 2022-06-20 11:49:46 -04:00
pmu.h Revert "KVM: x86: always allow host-initiated writes to PMU MSRs" 2022-06-20 11:49:46 -04:00
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: move all vcpu->arch.pio* setup in emulator_pio_in_out() 2022-06-24 12:53:50 -04:00
tss.h
x86.c KVM: x86: Fix handling of APIC LVT updates when userspace changes MCG_CAP 2022-07-08 15:58:16 -07:00
x86.h KVM: VMX: Enable Notify VM exit 2022-06-08 05:56:24 -04:00
xen.c KVM: x86/xen: Remove the redundantly included header file lapic.h 2022-04-13 13:37:18 -04:00
xen.h KVM: x86: do not set st->preempted when going back to user space 2022-06-08 04:21:06 -04:00