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Date: Tue, 20 Sep 2016 06:45:18 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: David Laight <David.Laight@...LAB.COM> Cc: Jiri Pirko <jiri@...nulli.us>, "netdev@...r.kernel.org" <netdev@...r.kernel.org> Subject: Re: UBSAN reports issue in ip_idents_reserve On Tue, 2016-09-20 at 13:36 +0000, David Laight wrote: > From: Eric Dumazet > > Sent: 20 September 2016 14:29 > ... > > > [ 47.565420] -2117905507 + -695755206 cannot be represented in type 'int' > ... > > I do not think we have to worry here. > > > > These is best effort, and unfortunately atomic_t are int. > > Not until we compile on a cpu where int arithmetic doesn't wrap. Then I guess the guy adding this kind of arches in the kernel will have to add all the core kernel infra. If you have an idea, I will happily review a patch.
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