lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [day] [month] [year] [list]
Date:	Tue, 08 Feb 2011 08:59:20 +0000
From:	tadeusz.struk@...el.com
To:	herbert@...dor.hengli.com.au
Cc:	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
	aidan.o.mahony@...el.com, gabriele.paoloni@...el.com,
	adrian.hoban@...el.com, tadeusz.struk@...el.com, jj@...osbits.net
Subject: Re: [PATCH] rfc4106, Intel, AES-NI: Don't leak memory in
 rfc4106_set_hash_subkey().

From: Tadeusz Struk <tadeusz.struk@...el.com>
Date: Sun, 16 Jan 2011 16:41:11 +0000
Subject: RE: [PATCH] rfc4106, Intel, AES-NI: Don't leak memory in rfc4106_set_hash_subkey().

Hi Jesper,
Thanks, but I think there is still a problem here. You don't want to kfree req_data
when the kmalloc failed. I think it should look as follows.  
Are you ok with this?

On Mon, 7 Feb 2011, Herbert Xu wrote:

> On Sun, Feb 06, 2011 at 09:34:33PM +0100, Jesper Juhl wrote:
> > On Mon, 7 Feb 2011, Herbert Xu wrote:
> > 
> > > On Sun, Feb 06, 2011 at 08:43:22PM +0100, Jesper Juhl wrote:
> > > > 
> > > > Herbert: If Tadeusz agrees, could you please replace the patch
> > > > you merged 
> > > > with the one above?
> > > 
> > > Please send an incremental patch.
> > > 
> > Sure thing. What would you like it based on exactly?
> 
> The current cryptodev-2.6 tree should do.
> 
Here goes.

Fix up previous patch that attempted to fix a mem leak in 
rfc4106_set_hash_subkey. The previous patch was flawed in that the 'goto 
out' would still leak. Now with sign-offs.

Signed-off-by: Tadeusz Struk <tadeusz.struk@...el.com>
Signed-off-by: Gabriele Paoloni <gabriele.paoloni@...el.com>
---
 arch/x86/crypto/aesni-intel_glue.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index e013552..c9f0227 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -874,11 +874,11 @@ rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
 
 	ret = crypto_ablkcipher_setkey(ctr_tfm, key, key_len);
 	if (ret)
-		goto out;
+		goto out_free_ablkcipher;
 
 	req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL);
 	if (!req) {
-		ret = -EINVAL;
+		ret = -ENOMEM;
 		goto out_free_ablkcipher;
 	}
 
@@ -911,12 +911,11 @@ rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
 		if (!ret)
 			ret = req_data->result.err;
 	}
+	kfree(req_data);
 out_free_request:
 	ablkcipher_request_free(req);
-	kfree(req_data);
 out_free_ablkcipher:
 	crypto_free_ablkcipher(ctr_tfm);
-out:
 	return ret;
 }
 
-- 
1.7.4

--------------------------------------------------------------
Intel Shannon Limited
Registered in Ireland
Registered Office: Collinstown Industrial Park, Leixlip, County Kildare
Registered Number: 308263
Business address: Dromore House, East Park, Shannon, Co. Clare

This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists