Re: [PATCH v4 2/6] IMA: conditionally allow empty rule data

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On 2020-10-22 1:38 p.m., Mimi Zohar wrote:
Hi Tushar,

On Wed, 2020-09-23 at 12:20 -0700, Tushar Sugandhi wrote:
ima_match_rule_data() permits the func to pass empty func_data.
For instance, for the following func, the func_data keyrings= is
optional.
     measure func=KEY_CHECK keyrings=.ima

But a new func in future may want to constrain the func_data to
be non-empty.  ima_match_rule_data() should support this constraint
and it shouldn't be hard-coded in ima_match_rule_data().

Update ima_match_rule_data() to conditionally allow empty func_data
for the func that needs it.

Signed-off-by: Tushar Sugandhi <tusharsu@xxxxxxxxxxxxxxxxxxx>

Policy rules may constrain what is measured, but that decision should
be left to the system owner or admin.

Mimi

Agreed. As you mentioned in the patch 5/6 of this series,
I will get rid of this patch.

~Tushar



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