Fix scan-build warning (null use).
Probably false positive but defensive approach is better here.
diff --git a/lib/crypto_backend/crypto_cipher_kernel.c b/lib/crypto_backend/crypto_cipher_kernel.c
index 1c39de1..0be04b4 100644
--- a/lib/crypto_backend/crypto_cipher_kernel.c
+++ b/lib/crypto_backend/crypto_cipher_kernel.c
@@ -187,6 +187,9 @@
/* Set encrypt/decrypt operation */
header = CMSG_FIRSTHDR(&msg);
+ if (!header)
+ return -EINVAL;
+
header->cmsg_level = SOL_ALG;
header->cmsg_type = ALG_SET_OP;
header->cmsg_len = CMSG_LEN(sizeof(*type));
