Merge branch 'master' into for-linus

1 files changed, 9 insertions, 1 deletions

diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 101c512564e..b85e61bcf24 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -249,7 +249,11 @@ void ima_counts_put(struct path *path, int mask)
 	struct inode *inode = path->dentry->d_inode;
 	struct ima_iint_cache *iint;
 
-	if (!ima_initialized || !S_ISREG(inode->i_mode))
+	/* The inode may already have been freed, freeing the iint
+	 * with it. Verify the inode is not NULL before dereferencing
+	 * it.
+	 */
+	if (!ima_initialized || !inode || !S_ISREG(inode->i_mode))
 		return;
 	iint = ima_iint_find_insert_get(inode);
 	if (!iint)
@@ -262,6 +266,8 @@ void ima_counts_put(struct path *path, int mask)
 	else if (mask & (MAY_READ | MAY_EXEC))
 		iint->readcount--;
 	mutex_unlock(&iint->mutex);
+
+	kref_put(&iint->refcount, iint_free);
 }
 
 /*
@@ -291,6 +297,8 @@ void ima_counts_get(struct file *file)
 	if (file->f_mode & FMODE_WRITE)
 		iint->writecount++;
 	mutex_unlock(&iint->mutex);
+
+	kref_put(&iint->refcount, iint_free);
 }
 EXPORT_SYMBOL_GPL(ima_counts_get);