Re: [PATCH v2] net/virtio-user: fix overflow

[Yuanhan Liu <yuanhan.liu@linux.intel.com>]

On Wed, Apr 05, 2017 at 02:22:27AM +0200, Thomas Monjalon wrote:
> 2017-03-15 16:08, Yuanhan Liu:
> > On Tue, Mar 14, 2017 at 10:09:56AM +0000, Wenfeng Liu wrote:
> > > virtio-user limits the qeueue number to 8 but provides no limit
> > > check against the queue number input from user. If a bigger queue
> > > number (> 8) is given, there is an overflow issue. Doing a sanity
> > > check could avoid it.
> > > 
> > > Fixes: 37a7eb2ae816 ("net/virtio-user: add device emulation layer")
> > > Cc: stable@dpdk.org
> > > 
> > > Signed-off-by: Wenfeng Liu <liuwf@arraynetworks.com.cn>
> > 
> > Applied to dpdk-next-virtio.
> 
> There is a compilation error when RTE_LIBRTE_VIRTIO_DEBUG_INIT is enabled:
> drivers/net/virtio/virtio_user_ethdev.c:423:32:
> fatal error: format specifies type 'unsigned int'
> but the argument has type 'uint64_t' (aka 'unsigned long') [-Wformat]
>                         VIRTIO_USER_ARG_QUEUES_NUM, queues,
>                                                     ^~~~~~
> 
> I will fix it when pulling next-virtio.

Thanks!

> Considering this log is about an error,
> does it make sense to have a compile option to enable it?

I think it makes more sense to print them unconditionally? They are
errors after all.

	--yliu

> I was expecting that "git grep 'PMD_INIT_LOG(ERR,' | wc -l" would return 0.
> Unfortunately, there are 434 occurences...