linux-kernel - [GIT][LIB] Fix memory leak in digital signature library

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Message-ID: <alpine.LRH.2.02.1302011620190.8934@tundra.namei.org>
Date:	Fri, 1 Feb 2013 16:21:36 +1100 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
cc:	linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [GIT][LIB] Fix memory leak in digital signature library

Please pull.


The following changes since commit 88b62b915b0b7e25870eb0604ed9a92ba4bfc9f7:
  Linus Torvalds (1):
        Linux 3.8-rc6

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git for-linus

YOSHIFUJI Hideaki (1):
      digsig: Fix memory leakage in digsig_verify_rsa()

 lib/digsig.c |    2 ++
 1 file changed, 2 insertions(+)

commit 7810cc1e7721220f1ed2a23ca95113d6434f6dcd
Author: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org>
Date:   Fri Jan 25 16:54:20 2013 +0200

    digsig: Fix memory leakage in digsig_verify_rsa()
    
    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>
    Cc: stable@...r.kernel.org
    Signed-off-by: James Morris <james.l.morris@...cle.com>

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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