From dc0ce6cc4b133f5f2beb8b47dacae13a7d283c2c Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Thu, 24 Mar 2022 08:52:07 +0300
Subject: [PATCH] lib/test: use after free in register_test_dev_kmod()
The "test_dev" pointer is freed but then returned to the caller.
Fixes: d9c6a72d6fa2 ("kmod: add test driver to stress test the module loader")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
lib/test_kmod.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/test_kmod.c b/lib/test_kmod.c
index ce15893914131..cb800b1d0d99c 100644
--- a/lib/test_kmod.c
+++ b/lib/test_kmod.c
@@ -1149,6 +1149,7 @@ static struct kmod_test_device *register_test_dev_kmod(void)
if (ret) {
pr_err("could not register misc device: %d\n", ret);
free_test_dev_kmod(test_dev);
+ test_dev = NULL;
goto out;
}