[PATCH] KEYS: encrypted: Add check for strsep

[Chen Ni]

Add check for strsep() in order to transfer the error.

Fixes: cd3bc044af48 ("KEYS: encrypted: Instantiate key with user-provided 
decrypted data")
Signed-off-by: Chen Ni <nic...@iscas.ac.cn>
---
 security/keys/encrypted-keys/encrypted.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/security/keys/encrypted-keys/encrypted.c 
b/security/keys/encrypted-keys/encrypted.c
index 8af2136069d2..76f55dd13cb8 100644
--- a/security/keys/encrypted-keys/encrypted.c
+++ b/security/keys/encrypted-keys/encrypted.c
@@ -237,6 +237,10 @@ static int datablob_parse(char *datablob, const char 
**format,
                        break;
                }
                *decrypted_data = strsep(&datablob, " \t");
+               if (!*decrypted_data) {
+                       pr_info("encrypted_key: decrypted_data is missing\n");
+                       break;
+               }
                ret = 0;
                break;
        case Opt_load:
-- 
2.25.1