linux-kernel - [PATCH 27/81] digsig: Fix memory leakage in digsig_verify

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Date:	Tue, 19 Feb 2013 15:48:50 -0300
From:	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>,
	Dmitry Kasatkin <dmitry.kasatkin@...el.com>,
	James Morris <james.l.morris@...cle.com>,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Subject: [PATCH 27/81] digsig: Fix memory leakage in digsig_verify_rsa()

3.5.7.6 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>

commit 7810cc1e7721220f1ed2a23ca95113d6434f6dcd upstream.

digsig_verify_rsa() does not free kmalloc'ed buffer returned by
mpi_get_buffer().

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@...el.com>
Signed-off-by: James Morris <james.l.morris@...cle.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
---
 lib/digsig.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/digsig.c b/lib/digsig.c
index 8c0e629..dc2be7e 100644
--- a/lib/digsig.c
+++ b/lib/digsig.c
@@ -162,6 +162,8 @@ static int digsig_verify_rsa(struct key *key,
 	memset(out1, 0, head);
 	memcpy(out1 + head, p, l);
 
+	kfree(p);
+
 	err = pkcs_1_v1_5_decode_emsa(out1, len, mblen, out2, &len);
 	if (err)
 		goto err;
-- 
1.7.9.5

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