linux-kernel - [PATCH] kmod: Release sub_info on cred allocation failure.

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Message-ID: <20090526081103.9132.98194.stgit@warthog.procyon.org.uk>
Date:	Tue, 26 May 2009 09:11:03 +0100
From:	David Howells <dhowells@...hat.com>
To:	torvalds@...l.org, akpm@...ux-foundation.org
Cc:	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	David Howells <dhowells@...hat.com>
Subject: [PATCH] kmod: Release sub_info on cred allocation failure.

From: Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>

call_usermodehelper_setup() forgot to kfree(sub_info)
when prepare_usermodehelper_creds() failed.

Signed-off-by: Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Signed-off-by: David Howells <dhowells@...hat.com>
---

 kernel/kmod.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)


diff --git a/kernel/kmod.c b/kernel/kmod.c
index b750675..7e95bed 100644
--- a/kernel/kmod.c
+++ b/kernel/kmod.c
@@ -370,8 +370,10 @@ struct subprocess_info *call_usermodehelper_setup(char *path, char **argv,
 	sub_info->argv = argv;
 	sub_info->envp = envp;
 	sub_info->cred = prepare_usermodehelper_creds();
-	if (!sub_info->cred)
+	if (!sub_info->cred) {
+		kfree(sub_info);
 		return NULL;
+	}
 
   out:
 	return sub_info;

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