From 0214d83aa5fd53bae81d9e66ddb30609d0055b76 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Thu, 20 Feb 2020 15:51:31 -0500
Subject: [PATCH] Improve handling of empty buffer in varint parsing
 (RIPD-1683)

---
 src/ripple/nodestore/impl/varint.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ripple/nodestore/impl/varint.h b/src/ripple/nodestore/impl/varint.h
index e74f53afd5..75d8e58a75 100644
--- a/src/ripple/nodestore/impl/varint.h
+++ b/src/ripple/nodestore/impl/varint.h
@@ -55,6 +55,8 @@ template <class = void>
 std::size_t
 read_varint(void const* buf, std::size_t buflen, std::size_t& t)
 {
+    if (buflen == 0)
+        return 0;
     t = 0;
     std::uint8_t const* p = reinterpret_cast<std::uint8_t const*>(buf);
     std::size_t n = 0;