Fix some problems found by Coverity static analysis.

[platform/upstream/cryptsetup.git] / lib / luks1 / af.c

diff --git a/lib/luks1/af.c b/lib/luks1/af.c
index 5e7df64..9c50c16 100644 (file)
--- a/lib/luks1/af.c
+++ b/lib/luks1/af.c
@@ -66,9 +66,14 @@ out:
 
 static int diffuse(char *src, char *dst, size_t size, const char *hash_name)
 {
-       unsigned int digest_size = crypt_hash_size(hash_name);
+       int hash_size = crypt_hash_size(hash_name);
+       unsigned int digest_size;
        unsigned int i, blocks, padding;
 
+       if (hash_size <= 0)
+               return 1;
+       digest_size = hash_size;
+
        blocks = size / digest_size;
        padding = size % digest_size;