Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto fixes from Herbert Xu:
 "This fixes a couple of places in the crypto code that were doing
  interruptible sleeps dangerously. They have been converted to use
  non-interruptible sleeps.

  This also fixes a bug in asymmetric_keys where it would trigger a
  use-after-free if a request returned EBUSY due to a full device queue"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: gcm - wait for crypto op not signal safe
  crypto: drbg - wait for crypto op not signal safe
  crypto: asymmetric_keys - handle EBUSY due to backlog correctly

crypto/asymmetric_keys/public_key.c

@@ -141,7 +141,7 @@ int public_key_verify_signature(const struct public_key *pkey,
 	 * signature and returns that to us.
 	 */
 	ret = crypto_akcipher_verify(req);
-	if (ret == -EINPROGRESS) {
+	if ((ret == -EINPROGRESS) || (ret == -EBUSY)) {
 		wait_for_completion(&compl.completion);
 		ret = compl.err;
 	}

crypto/drbg.c

@@ -1767,9 +1767,8 @@ static int drbg_kcapi_sym_ctr(struct drbg_state *drbg,
 			break;
 		case -EINPROGRESS:
 		case -EBUSY:
-			ret = wait_for_completion_interruptible(
-				&drbg->ctr_completion);
-			if (!ret && !drbg->ctr_async_err) {
+			wait_for_completion(&drbg->ctr_completion);
+			if (!drbg->ctr_async_err) {
 				reinit_completion(&drbg->ctr_completion);
 				break;
 			}

crypto/gcm.c

@@ -152,9 +152,7 @@ static int crypto_gcm_setkey(struct crypto_aead *aead, const u8 *key,
 
 	err = crypto_skcipher_encrypt(&data->req);
 	if (err == -EINPROGRESS || err == -EBUSY) {
-		err = wait_for_completion_interruptible(
-			&data->result.completion);
-		if (!err)
+		wait_for_completion(&data->result.completion);
 		err = data->result.err;
 	}