On Tue, 2016-09-20 at 07:11 -0700, Eric Dumazet wrote:
> On Tue, 2016-09-20 at 15:39 +0200, Jiri Pirko wrote:
> > I see. So how to silent the warning?
> We can replace the atomic_add_return() and use a loop around
> atomic_read() and atomic_cmpxhg()
> This would change the nice property of x86 xadd into a loop.
> Or we also could fallback to random generation if the atomic_cmpxchg()
> I'll provide a patch, thanks.
I looks at other places, I am surprised you do not see other UBSAN
issues in networking :)
netdev_refcnt_read() can potentially gives errors as well.