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

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Message-ID: <ZCBtOxqRJ9+P+G0z@1wt.eu>
Date:   Sun, 26 Mar 2023 18:05:15 +0200
From:   Willy Tarreau <w@....eu>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     linux@...ssschuh.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/8] tools/nolibc: add support for stack protector

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!

Willy