[LTP] [PATCH] tst_security.sh: Use the same value for checkreqprot

[Petr Vorel]

Hi all,

FYI patch merged.

Kind regards,
Petr

> kernel commit e9c38f9fc2cc ("Documentation,selinux: deprecate setting
> checkreqprot to 1") from v5.10-rc1 deprecated checkreqprot value 1
> (emit warning in dmesg). Code is used only in ima_selinux.sh
> which requires 5.12. Touching /sys/fs/selinux/checkreqprot is required
> to trigger the measurement via selinux_ima_measure_state().

> Using the same value (0 by default) works on recent 6.14, it should be
> safe changing to use the same value. This way misleading warning is
> avoided and hopefully kept working in the future.

> Also, this way it does not modify SUT setting (don't influence other
> tests), which is always better.

> Fixes: 36c695e497 ("tst_security.sh: Add helper tst_update_selinux_state()")
> Signed-off-by: Petr Vorel <pvorel@suse.cz>
> ---
> @SELinux developers: FYI tst_security.sh is used in LTP test in
> ima_selinux.sh [1] test.

> Kind regards,
> Petr

> [1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/security/integrity/ima/tests/ima_selinux.sh

>  testcases/lib/tst_security.sh | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)

> diff --git a/testcases/lib/tst_security.sh b/testcases/lib/tst_security.sh
> index 4e2d34ca98..820736c723 100644
> --- a/testcases/lib/tst_security.sh
> +++ b/testcases/lib/tst_security.sh
> @@ -142,11 +142,10 @@ tst_get_enforce()

>  tst_update_selinux_state()
>  {
> -	local cur_val new_val
> +	local val
>  	local dir=$(tst_get_selinux_dir)
>  	[ -n "$dir" ] || return 1

> -	cur_val=$(cat $dir/checkreqprot)
> -	[ $cur_val = 1 ] && new_val=0 || new_val=1
> -	echo $new_val > $dir/checkreqprot
> +	val=$(cat $dir/checkreqprot)
> +	echo $val > $dir/checkreqprot
>  }