[RFC PATCH 1/2] ima: don't access a file's integrity status before an IMA policy is loaded

[Mimi Zohar]

From: Test <test@localhost.localdomain>

Only after an IMA policy is loaded, check, save, or update the cached
file's integrity status.

Signed-off-by: Mimi Zohar <zo...@linux.ibm.com>
---
 security/integrity/ima/ima_main.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/security/integrity/ima/ima_main.c 
b/security/integrity/ima/ima_main.c
index 9ef748ea829f..9d1196f712e1 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -606,6 +606,9 @@ void ima_post_create_tmpfile(struct user_namespace 
*mnt_userns,
        struct integrity_iint_cache *iint;
        int must_appraise;
 
+       if (!ima_policy_flag || !S_ISREG(inode->i_mode))
+               return;
+
        must_appraise = ima_must_appraise(mnt_userns, inode, MAY_ACCESS,
                                          FILE_CHECK);
        if (!must_appraise)
@@ -636,6 +639,9 @@ void ima_post_path_mknod(struct user_namespace *mnt_userns,
        struct inode *inode = dentry->d_inode;
        int must_appraise;
 
+       if (!ima_policy_flag || !S_ISREG(inode->i_mode))
+               return;
+
        must_appraise = ima_must_appraise(mnt_userns, inode, MAY_ACCESS,
                                          FILE_CHECK);
        if (!must_appraise)
-- 
2.27.0