From:
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.
---
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
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