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

[Thomas Monjalon <thomas.monjalon@6wind.com>]

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.

Considering this log is about an error,
does it make sense to have a compile option to enable it?
I was expecting that "git grep 'PMD_INIT_LOG(ERR,' | wc -l" would return 0.
Unfortunately, there are 434 occurences...