RE: UBSAN reports issue in ip_idents_reserve

From: Eric Dumazet

Sent: 20 September 2016 14:29

...

quoted

[   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.

While I expect that various other parts of the kernel (and userspace)
wouldn't like such cpu, they do exist.

	David