tomoyo: fix potential use after free

The original code returns a freed pointer.  This function is expected to
return NULL on errors.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index ff51f1026b57..ef89947a774b 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -886,6 +886,7 @@ static struct tomoyo_profile *tomoyo_find_or_assign_new_profile(const unsigned
         ptr = kmalloc(sizeof(*ptr), GFP_KERNEL);
         if (!tomoyo_memory_ok(ptr)) {
                 kfree(ptr);
+                ptr = NULL;
                 goto ok;
         }
         for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++)