[PATCH] nptl: Zero-extend arguments to SETXID syscalls [BZ #26248]

[Aurelien Jarno]

On 2020-07-16 17:57, Florian Weimer via Libc-alpha wrote:
> * H. J. Lu via Libc-alpha:
> 
> >> Isn't it sufficient to change the type of id to unsigned long int[3]?
> >> The UID arguments are unsigned on the kernel side, so no sign extension
> >> is required.
> >
> > It works.  Here is the updated patch.  OK for master?
> 
> Does the test work if the list of supplementary groups is empty?

It depends how you defined "work". It doesn't fail wrongly when it
happens, so there is no risk of a failed test on other architectures.
OTOH it doesn't catch the issue on x32 as setgroups(0, bad_pointer) just
return successfully.

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net