[PATCH] ecryptfs: fix crypto_alloc_blkcipher() error check

[Akinobu Mita]

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

Cc: Mike Halcrow <mhalcrow@xxxxxxxxxx>
Cc: Phillip Hellewell <phillip@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>

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

Index: work-fault-inject/fs/ecryptfs/crypto.c
===================================================================
--- work-fault-inject.orig/fs/ecryptfs/crypto.c
+++ work-fault-inject/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);
-
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