1 files changed, 4 insertions, 0 deletions
diff --git a/src/crypto/base64/base64.c b/src/crypto/base64/base64.c
index 12a52cf..4822fb8 100644
--- a/src/crypto/base64/base64.c
+++ b/src/crypto/base64/base64.c
@@ -373,6 +373,10 @@ int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, uint8_t *out, int *out_len,
           rv = 0;
           goto end;
         }
+        if (eof > v) {
+          rv = -1;
+          goto end;
+        }
         ret += (v - eof);
       } else {
         eof = 1;