On Fri, 11 Feb 2011, Jesper Juhl wrote:
> On Fri, 11 Feb 2011, Paoloni, Gabriele wrote:
>
> > Well anyway I think that the return value of "ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL)" has to be changed from -EINVAL to -ENOMEM in case of failure. That is why would stay on the patch that Tadeusz proposed. Otherwise Juhl should send another one....
> >
> I'll take a look again later this evening when I get home from work.
>
Hopefully this takes care of all complaints and can actually get merged so
we can get the leak fixed (patch is against current cryptodev-2.6 tree).
Fix up previous patch that failed to properly fix mem leak in
rfc4106_set_hash_subkey(). This add-on patch; fixes the leak. moves
kfree() out of the error path, returns -ENOMEM rather than -EINVAL when
ablkcipher_request_alloc() fails.
Signed-off-by: Jesper Juhl <jj@xxxxxxxxxxxxx>
---
aesni-intel_glue.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index e013552..502b76d 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -876,17 +876,15 @@ rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
if (ret)
goto out;
+ ret = -ENOMEM;
req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL);
- if (!req) {
- ret = -EINVAL;
+ if (!req)
goto out_free_ablkcipher;
- }
req_data = kmalloc(sizeof(*req_data), GFP_KERNEL);
- if (!req_data) {
- ret = -ENOMEM;
+ if (!req_data)
goto out_free_request;
- }
+
memset(req_data->iv, 0, sizeof(req_data->iv));
/* Clear the data in the hash sub key container to zero.*/
@@ -911,12 +909,11 @@ 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;
}
--
Jesper Juhl <jj@xxxxxxxxxxxxx> http://www.chaosbits.net/
Plain text mails only, please.
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
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