[ 3.5.y.z extended stable ] Patch "digsig: Fix memory leakage in digsig_verify_rsa()" has been added to staging queue

Herton Ronaldo Krzesinski herton.krzesinski at canonical.com
Tue Feb 12 21:18:52 UTC 2013

This is a note to let you know that I have just added a patch titled

    digsig: Fix memory leakage in digsig_verify_rsa()

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



>From 7d6b130b4d63175f48fc26dbc5ede1d5ac0d48c1 Mon Sep 17 00:00:00 2001
From: YOSHIFUJI Hideaki <yoshfuji at linux-ipv6.org>
Date: Fri, 25 Jan 2013 16:54:20 +0200
Subject: [PATCH] digsig: Fix memory leakage in digsig_verify_rsa()

commit 7810cc1e7721220f1ed2a23ca95113d6434f6dcd upstream.

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

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji at linux-ipv6.org>
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin at intel.com>
Signed-off-by: James Morris <james.l.morris at oracle.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.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;

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