integrity: ima iint radix_tree_lookup locking fix

Based on Andrew Morton's comments:
- add missing locks around radix_tree_lookup in ima_iint_insert()

Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c
index 1f035e8d29c7..ec79f1ee992c 100644
--- a/security/integrity/ima/ima_iint.c
+++ b/security/integrity/ima/ima_iint.c
@@ -73,8 +73,10 @@ out:
         if (rc < 0) {
                 kmem_cache_free(iint_cache, iint);
                 if (rc == -EEXIST) {
+                        spin_lock(&ima_iint_lock);
                         iint = radix_tree_lookup(&ima_iint_store,
                                                  (unsigned long)inode);
+                        spin_unlock(&ima_iint_lock);
                 } else
                         iint = NULL;
         }