Re: [PATCH] time: Avoid undefined behaviour in timespec64_to_ns

[Arnd Bergmann]

On Tue, Sep 15, 2020 at 2:20 PM Zengtao (B) <prime.zeng@xxxxxxxxxxxxx> wrote:

> > > Fixes: bd40a175769d ("y2038: itimer: change implementation to
> > timespec64")
> >
> > This one caused the regression, but if we add the check here, it
> > may be best to also add it in prior kernels that may have the same
> > bug in other callers of the same function. Maybe backport all the
> > way to stable kernels that first added timespec64?
> >
>
> I think we need to do the backport, but not sure about the start point
> Thanks for your review.

I would suggest

Cc: <stable@xxxxxxxxxxxxxxx> # v3.17+
Fixes: 361a3bf00582 ("time64: Add time64.h header and define struct timespec64")

       Arnd