Re: [RFC v1.1 2/5] crypto: ksign - digital signature verification support

[Dmitry Kasatkin <dmitry.kasatkin@intel.com>]

On 16/08/11 04:00, James Morris wrote:
> On Thu, 11 Aug 2011, Dmitry Kasatkin wrote:
>
>> +static int ksign_verify_rsa(struct key *key,
>> +		    const char *sig, int siglen,
>> +		       const char *h, int hlen)
>> +{
>> +	int err = -ENOMEM;
>> +	unsigned long len;
>> +	unsigned long mlen, mblen;
>> +	unsigned nret, l;
>> +	int valid, head, i;
>> +	unsigned char *out1 = NULL, *out2 = NULL;
>> +	MPI in = NULL, res = NULL, pkey[2];
>> +	uint8_t *p, *datap, *endp;
>> +	struct user_key_payload *ukp;
>> +	struct pubkey_hdr *pkh;
>> +
>> +	down_read(&key->sem);
>> +	ukp = key->payload.data;
>> +	pkh = (struct pubkey_hdr *)ukp->data;
>> +
>> +	if (pkh->version != 1)
>> +		return -EINVAL;
>> +
>> +	if (pkh->algo != PUBKEY_ALGO_RSA)
>> +		return -EINVAL;
> Are you supposed to be still holding key->sem here?
>
Of course not.
that was late addition. Should be goto as in following cases...

- Dmitry