[PATCH] ima: clean up IMA_MEASURE_PCR_IDX in Kconfig

[PATCH] ima: clean up IMA_MEASURE_PCR_IDX in Kconfig

[Julian Braha]

The IMA_MEASURE_PCR_IDX option is not visible for users to set, so it
always uses its default, 10. This means that the 'range 8 14' is dead
code, and the "If unsure, use the default 10" in the help text is
misleading because the user *has no other choice*.

During the first patch submission to add this option in 2008 [1],
the submitter originally gave this option a prompt:

"PCR for Aggregate (8 <= Index <= 14)"

then later removed it in the revision, without adjusting the rest of the
option accordingly [2].

Let's clean up this of this IMA_MEASURE_PCR_IDX config option to be
consistent with its current, non-visible state.

This dead range was found by kconfirm, a static analysis tool for Kconfig.

Signed-off-by: Julian Braha <julianbraha@gmail.com>
---
 security/integrity/ima/Kconfig | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/security/integrity/ima/Kconfig b/security/integrity/ima/Kconfig
index b3a9f86809b0..8a67bc1faa4c 100644
--- a/security/integrity/ima/Kconfig
+++ b/security/integrity/ima/Kconfig
@@ -46,12 +46,11 @@ config IMA_KEXEC
 
 config IMA_MEASURE_PCR_IDX
 	int
-	range 8 14
 	default 10
 	help
 	  IMA_MEASURE_PCR_IDX determines the TPM PCR register index
 	  that IMA uses to maintain the integrity aggregate of the
-	  measurement list.  If unsure, use the default 10.
+	  measurement list.
 
 config IMA_LSM_RULES
 	bool
-- 
2.55.0