[PATCH] CRED: Fix memory leak in error handling

[David Howells]

From: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>

Fix a memory leak on an OOM condition in prepare_usermodehelper_creds().

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---

 kernel/cred.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/kernel/cred.c b/kernel/cred.c
index 1ed8ca1..1b1129d 100644
--- a/kernel/cred.c
+++ b/kernel/cred.c
@@ -364,7 +364,7 @@ struct cred *prepare_usermodehelper_creds(void)
 
 	new = kmem_cache_alloc(cred_jar, GFP_ATOMIC);
 	if (!new)
-		return NULL;
+		goto free_tgcred;
 
 	kdebug("prepare_usermodehelper_creds() alloc %p", new);
 
@@ -397,6 +397,10 @@ struct cred *prepare_usermodehelper_creds(void)
 
 error:
 	put_cred(new);
+free_tgcred:
+#ifdef CONFIG_KEYS
+	kfree(tgcred);
+#endif
 	return NULL;
 }
 

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