From: Akinobu Mita <akinobu.mita@gmail.com>

The return value of crypto_alloc_blkcipher() should be checked by IS_ERR().

Cc: Mike Halcrow <mhalcrow@us.ibm.com>
Cc: Phillip Hellewell <phillip@hellewell.homeip.net>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 fs/ecryptfs/crypto.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)

diff -puN fs/ecryptfs/crypto.c~ecryptfs-fix-crypto_alloc_blkcipher-error-check fs/ecryptfs/crypto.c
--- a/fs/ecryptfs/crypto.c~ecryptfs-fix-crypto_alloc_blkcipher-error-check
+++ a/fs/ecryptfs/crypto.c
@@ -820,7 +820,8 @@ int ecryptfs_init_crypt_ctx(struct ecryp
 	crypt_stat->tfm = crypto_alloc_blkcipher(full_alg_name, 0,
 						 CRYPTO_ALG_ASYNC);
 	kfree(full_alg_name);
-	if (!crypt_stat->tfm) {
+	if (IS_ERR(crypt_stat->tfm)) {
+		rc = PTR_ERR(crypt_stat->tfm);
 		ecryptfs_printk(KERN_ERR, "cryptfs: init_crypt_ctx(): "
 				"Error initializing cipher [%s]\n",
 				crypt_stat->cipher);
_