lkdtm: do not leak free page on kmalloc failure

This frees the allocated page if there is a kmalloc failure.

Signed-off-by: Kees Cook <keescook@chromium.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c
index 5b3a63c87ec9..0a5cbbe12452 100644
--- a/drivers/misc/lkdtm.c
+++ b/drivers/misc/lkdtm.c
@@ -507,8 +507,10 @@ static void lkdtm_do_action(enum ctype which)
                         break;
 
                 val = kmalloc(1024, GFP_KERNEL);
-                if (!val)
+                if (!val) {
+                        free_page(p);
                         break;
+                }
 
                 base = (int *)p;