Re: [PATCH] [v2] landlock: work around gcc-16 -Wuninitialized warning

[Arnd Bergmann]

On Wed, Sep 16, 2026, at 14:25, Mickaël Salaün wrote:
> On Wed, Sep 16, 2026 at 10:49:47AM +0200, Sebastian Andrzej Siewior wrote:
>> On 2026-09-15 22:10:30 [+0200], Arnd Bergmann wrote:
>> > Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110743
>> > Link: https://lore.kernel.org/all/20260619082133.3504146-1-arnd@xxxxxxxxxx/
>> > Fixes: a260c0055665 ("landlock: Add a place for flags to layer rules")
>> > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
>> > ---
>> > v2: rebased to linux-next-20260914
>> > 
>> > I originally sent this in June, but got no reply and this still
>> > happens with gcc-16.2, which is the latest stable release.
>
> Thanks Arnd, I missed it.  It's in my -next branch now.
>
>> > 
>> > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
>> 
>> This looks reasonable. I don't see this with gcc-16.2 and the referenced
>> gcc bug has it as fixed.
>
> If GCC is fixed now, should we keep this work around?

As far as I can tell, 16.2 is still affected, even though it should be
fixed in HEAD. gcc-16.3 won't be released until spring 2027 though.

It is possible that there are additional configuration options that
have to be set just right to reproduce the issue. I've attached a
configuration that triggered it for me this week.

      Arnd

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