Re: [LTP] [PATCH v2] mseal02: Handle multiple errnos for 32-bit compat mode

Petr Vorel
2026-03-20T17:27:47Z

Hi Wei, all,

> Hi all,

> > In 32-bit compat mode, the overflow_size (calculated using a 32-bit ULONG_MAX)
> > does not cause a 64-bit integer wrap-around when added to the start address.
> > Consequently, the kernel see valid range that points to unmapped space, returning
> > ENOMEM instead of the expected EINVAL.

> Also LGTM.

> Reviewed-by: Petr Vorel <pvorel@suse.cz>

> + if (tst_is_compat_mode())
> + tcases[2].exp_err = ENOMEM;

I was about to merge, but thinking about it twice, it'd make sense instead
hardcoding index 2 (we talked about it in the past, that hardcoding indexes can
cause problems the future) to add attribute .check_kver, similar way Jan Polensky
did in dcf0c145d9 ("setxattr02: Adapt test for kernel 7.1.0+ socket xattr support").

Could you please modify it in v3?

Kind regards,
Petr

[1] https://github.com/linux-test-project/ltp/commit/dcf0c145d90531b919e633bb3f481f59a867aa06

> Kind regards,
> Petr