cifs: Cleanup: check return codes of crypto api calls

Check return codes of crypto api calls and either log an error or log
an error and return from the calling function with error.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c
index 1c5b770c3141..42b9fff48751 100644
--- a/fs/cifs/smbencrypt.c
+++ b/fs/cifs/smbencrypt.c
@@ -157,8 +157,14 @@ mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
                 cERROR(1, "%s: Could not init md4 shash\n", __func__);
                 goto mdfour_err;
         }
-        crypto_shash_update(&sdescmd4->shash, link_str, link_len);
+        rc = crypto_shash_update(&sdescmd4->shash, link_str, link_len);
+        if (rc) {
+                cERROR(1, "%s: Could not update with link_str\n", __func__);
+                goto mdfour_err;
+        }
         rc = crypto_shash_final(&sdescmd4->shash, md4_hash);
+        if (rc)
+                cERROR(1, "%s: Could not genereate md4 hash\n", __func__);
 
 mdfour_err:
         crypto_free_shash(md4);