linux-kernel - [PATCH] cred fix error handling

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Message-ID: <20100329140539.GB24478@Krystal>
Date:	Mon, 29 Mar 2010 10:05:39 -0400
From:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:	David Howells <dhowells@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] cred fix error handling

Causes memory leak on OO mem condition.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
CC: David Howells <dhowells@...hat.com>
---
 kernel/cred.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Index: linux.trees.git/kernel/cred.c
===================================================================
--- linux.trees.git.orig/kernel/cred.c	2010-03-29 09:40:53.000000000 -0400
+++ linux.trees.git/kernel/cred.c	2010-03-29 10:03:15.000000000 -0400
@@ -364,7 +364,7 @@ struct cred *prepare_usermodehelper_cred
 
 	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_cred
 
 error:
 	put_cred(new);
+free_tgcred:
+#ifdef CONFIG_KEYS
+	kfree(tgcred);
+#endif
 	return NULL;
 }
 

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
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