From: Stefan Berger <stefanb@xxxxxxxxxxxxx>
commit 89677197ae709eb1ab3646952c44f6a171c9e74c upstream.
Before printing a policy rule scan for inactive LSM labels in the policy
rule. Inactive LSM labels are identified by args_p != NULL and
rule == NULL.
Fixes: 483ec26eed42 ("ima: ima/lsm policy rule loading logic bug fixes")
Signed-off-by: Stefan Berger <stefanb@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # v5.6+
Acked-by: Christian Brauner <brauner@xxxxxxxxxx>
[zohar@xxxxxxxxxxxxx: Updated "Fixes" tag]
Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
security/integrity/ima/ima_policy.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -1967,6 +1967,14 @@ int ima_policy_show(struct seq_file *m,
rcu_read_lock();
+ /* Do not print rules with inactive LSM labels */
+ for (i = 0; i < MAX_LSM_RULES; i++) {
+ if (entry->lsm[i].args_p && !entry->lsm[i].rule) {
+ rcu_read_unlock();
+ return 0;
+ }
+ }
+
if (entry->action & MEASURE)
seq_puts(m, pt(Opt_measure));
if (entry->action & DONT_MEASURE)
