Re: [PATCH 0/8] tools/nolibc: add support for stack protector

Willy Tarreau
2023-03-26T16:56:15Z

On Sun, Mar 26, 2023 at 06:05:15PM +0200, Willy Tarreau wrote:
> On Sun, Mar 26, 2023 at 06:00:45PM +0200, Willy Tarreau wrote:
> > On Sun, Mar 26, 2023 at 08:45:55AM -0700, Paul E. McKenney wrote:
> > > Glad I could "help"! Timers. Huh. ;-)
> > >
> > > Checking v6.2, though the rebase is a bit messy, so I won't be all
> > > that confident in the results.
> >
> > I got the same as you now. I don't know what I missed before not to
> > face it, maybe it's the consequence of the rebase. I've re-applied
> > the patches on top of 6.2.8 and am retesting now.
> >
> > I think you don't need to waste more of your time on this for now
> > since we have a reproducer. Thomas and I should take over.
>
> And it's a 6.3 regression, as 6.2.8 works fine:
>
> $ make run
> (...)
> Kernel: arch/x86/boot/bzImage is ready (#2)
> make[1]: Leaving directory '/g/public/linux/master'
> 126 test(s) passed.
> $ tail run.out
> Errors during this test: 0
>
> Running test 'protection'
> 0 -fstackprotector [OK]
> Errors during this test: 0
>
> Total number of errors: 0
> Leaving init with final status: 0
> [ 3.388706] ACPI: PM: Preparing to enter system sleep state S5
> [ 3.389424] reboot: Power down
>
> Now let's have fun bisecting it!

So I have a good news, 6.3-rc1 which dev.2023.03.20a is based on, fails,
while 6.3-rc3 works. I haven't got further yet and am not sure it's useful
to dig further given that it's an already fixed problem that is not related
to the patches in your branch. I don't know if you usually rebase on more
recent tags though.

Willy