Re: [PATCH v2] KVM: x86: Fully initialize 'struct kvm_lapic_irq' in kvm_pv_kick_cpu_op()

From: Vitaly Kuznetsov
Date: Fri Jul 08 2022 - 10:27:53 EST

Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> writes:

> 'vector' and 'trig_mode' fields of 'struct kvm_lapic_irq' are left
> uninitialized in kvm_pv_kick_cpu_op(). While these fields are normally
> not needed for APIC_DM_REMRD, they're still referenced by
> __apic_accept_irq() for trace_kvm_apic_accept_irq(). Fully initialize
> the structure to avoid consuming random stack memory.
> Fixes: a183b638b61c ("KVM: x86: make apic_accept_irq tracepoint more generic")
> Reported-by: syzbot+d6caa905917d353f0d07@xxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>

The patch was sent to linux-hyperv@ by mistake, my apologies.