[LTP] [PATCH ltp] IMA: Add tests for uid, gid, fowner, and fgroup options

[Petr Vorel]

Hi Alex,

> Requires "ima: add gid support".
I haven't test the patch yet, but LTP supports (unlike kselftest) various kernel
versions. Thus there should be some check to prevent old kernels failing.
You could certainly wrap new things with if tst_kvcmp. If there is a chance new
functionality can be detected, we prefer it because various features are
sometimes backported to enterprise distros' kernels.

Also, adding new test ima_measurements02.sh with TST_MIN_KVER would also work,
although for IMA tests I usually kept everything in a single file.

...
> +++ b/testcases/kernel/security/integrity/ima/tests/ima_measurements.sh
> @@ -8,6 +8,7 @@

>  TST_NEEDS_CMDS="awk cut sed"
You should add sudo:

TST_NEEDS_CMDS="awk cut sed sudo"
>  TST_SETUP="setup"
> +TST_CLEANUP="cleanup"
>  TST_CNT=3
>  TST_NEEDS_DEVICE=1

> @@ -20,6 +21,13 @@ setup()
>  	TEST_FILE="$PWD/test.txt"
>  	POLICY="$IMA_DIR/policy"
>  	[ -f "$POLICY" ] || tst_res TINFO "not using default policy"
> +
> +	cat $IMA_POLICY > policy-original
This might not work if CONFIG_IMA_READ_POLICY is not set. There is
check_policy_readable() helper in ima_setup.sh. Is it really needed anyway?

> +}
> +
> +cleanup()
> +{
> +	cat policy-original > $IMA_POLICY
Again, this will not work if CONFIG_IMA_WRITE_POLICY not set.
And this is very likely not to be set.

...

Kind regards,
Petr