dcb: use after free in dcb_flushapp()

The original code has a use after free bug because it's not using the
_safe() version of the list_for_each_entry() macro.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/dcb/dcbnl.c b/net/dcb/dcbnl.c
index 4323bd441f0f..d900ab99814a 100644
--- a/net/dcb/dcbnl.c
+++ b/net/dcb/dcbnl.c
@@ -1643,9 +1643,10 @@ EXPORT_SYMBOL(dcb_setapp);
 static void dcb_flushapp(void)
 {
         struct dcb_app_type *app;
+        struct dcb_app_type *tmp;
 
         spin_lock(&dcb_lock);
-        list_for_each_entry(app, &dcb_app_list, list) {
+        list_for_each_entry_safe(app, tmp, &dcb_app_list, list) {
                 list_del(&app->list);
                 kfree(app);
         }