Re: [PATCH 6.4 00/28] 6.4.1-rc1 review - hppa argument list too long

[Guenter Roeck]

On 7/2/23 16:30, Linus Torvalds wrote:
> On Sun, 2 Jul 2023 at 15:45, Linus Torvalds
> <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> > Would you mind just verifying that yes, that commit on mainline is
> > broken for you, and the previous one works?
>
> Also, while I looked at it again, and still didn't understand why
> parisc would be different here, I *did* realize that because parisc
> has a stack that grows up, the debug warning I added for GUP won't
> trigger.
>
> So if I got that execve() logic wrong for STACK_GROWSUP (which I
> clearly must have), then exactly because it's grows-up, a GUP failure
> wouldn't warn about not expanding the stack.
>
> IOW, would you mind applying something like this on top of the current
> kernel, and let me know if it warns?

I can reproduce the problem in qemu. However, I do not see a warning
after applying your patch.

Guenter