[LTP] ima_tpm.sh: properly detect failure to verify the IMA measurement list

[linuxtestproject.agent@gmail.com]

Hi Mimi,

On Tue, 25 Aug 2026, Mimi Zohar wrote:
> ima_tpm.sh: properly detect failure to verify the IMA measurement list

> 	if [ -z "$pcr" ]; then
> 		tst_res $res "failed to find aggregate PCR-10 $msg"
> 		tst_res TINFO "hash file:"
> 		cat hash.txt >&2
> -		return
> +		return 1
> 	fi

> +	else
> +		tst_res TFAIL "aggregate PCR value does not match real PCR value"
> +	fi

Could the helper's result classification be preserved here instead of
unconditionally adding TFAIL for every nonzero return?

When evmctl is older than 1.3.1 with a SHA-1 measurement list, setup allows
the test to continue with MISSING_EVMCTL=1. If that evmctl does not produce
a parseable aggregate, the helper reports TCONF through $res, but the new
return path then also records TFAIL. Since tst_res retains both result bits,
this unsupported-tool path becomes a test failure.

Verdict - Needs revision

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