Greg Kroah-Hartman a34daa1c47 UPSTREAM: kvm: initialize all of the kvm_debugregs structure before sending it to userspace ...

commit 2c10b61421a28e95a46ab489fd56c0f442ff6952 upstream.

When calling the KVM_GET_DEBUGREGS ioctl, on some configurations, there
might be some unitialized portions of the kvm_debugregs structure that
could be copied to userspace.  Prevent this as is done in the other kvm
ioctls, by setting the whole structure to 0 before copying anything into
it.

Bonus is that this reduces the lines of code as the explicit flag
setting and reserved space zeroing out can be removed.

Bug: 276839298
Cc: Sean Christopherson <seanjc@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: <x86@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: stable <stable@kernel.org>
Reported-by: Xingyuan Mo <hdthky0@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Message-Id: <20230214103304.3689213-1-gregkh@linuxfoundation.org>
Tested-by: Xingyuan Mo <hdthky0@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: Iba91db0bd1b8380584f48b0ca94d8c104afcce29

2023-05-16 11:40:27 +00:00

..

mmu

UPSTREAM: KVM: x86/mmu: Fix race condition in direct_page_fault

2023-01-30 09:50:17 +00:00

svm

KVM: SVM: fix tsc scaling cache logic

2023-02-01 08:27:23 +01:00

vmx

UPSTREAM: KVM: VMX: Move preemption timer <=> hrtimer dance to common x86

2023-04-12 11:08:30 +00:00

cpuid.c

KVM: x86: Do not return host topology information from KVM_GET_SUPPORTED_CPUID

2023-01-18 11:48:57 +01:00

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: x86: emulator: update the emulation mode after CR0 write

2022-11-10 18:15:42 +01:00

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

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm

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: Trace re-injected exceptions

2022-11-10 18:15:24 +01:00

tss.h

…

x86.c

UPSTREAM: kvm: initialize all of the kvm_debugregs structure before sending it to userspace

2023-05-16 11:40:27 +00:00

x86.h

lockdep: Fix -Wunused-parameter for _THIS_IP_

2022-09-20 12:39:42 +02:00

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: x86: do not set st->preempted when going back to user space

2022-08-11 13:07:51 +02:00