[RFC] kvm: vgic: are these warnings wrong?

Marc Zyngier marc.zyngier at arm.com
Tue Nov 14 01:07:46 PST 2017


On 14/11/17 06:47, AKASHI Takahiro wrote:
> Hi Marc,
> 
> I've just run a static analyzer to v4.14.
> While most of warnings/errors are false-positive, as you can easily imagine,
> there are something dubious. Can you please check ones below?
> 
> virt/kvm/arm/vgic/vgic-v3.c:352 vgic_v3_save_pending_tables() error: uninitialized symbol 'val'.
> virt/kvm/arm/vgic/vgic-its.c:424 its_sync_lpi_pending_table() error: uninitialized symbol 'pendmask'.
> virt/kvm/arm/vgic/vgic-its.c:779 vgic_its_alloc_collection() error: potential null dereference 'collection'.  (kzalloc returns null)
> virt/kvm/arm/vgic/vgic-irqfd.c:115 kvm_vgic_setup_default_irq_routing() warn: double check that we're allocating correct size: 48 vs 64
> 
> # I believe that the messages here are self-describing.

Hi Takahiro,

All of these are pretty good findings... Out of curiosity, what is the
tool you've been using?

Many thanks for reporting these bugs.

	M.
-- 
Jazz is not dead. It just smells funny...



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