From 7617cce0c6f2abe5f083156405494d8e84630f4b Mon Sep 17 00:00:00 2001
From: Leonid Yuriev <leo@yuriev.ru>
Date: Wed, 27 Feb 2019 23:26:15 +0300
Subject: [PATCH] mdbx-tools: fix Coverity warning (paranoia).

Change-Id: I3ff33a9eb2c58fe601566fd4101f9c95d76d29de
---
 src/tools/mdbx_load.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/tools/mdbx_load.c b/src/tools/mdbx_load.c
index 2458b0e2..9789e83a 100644
--- a/src/tools/mdbx_load.c
+++ b/src/tools/mdbx_load.c
@@ -431,7 +431,13 @@ int main(int argc, char *argv[]) {
     goto env_close;
   }
 
-  kbuf.iov_len = mdbx_env_get_maxkeysize(env) * 2 + 2;
+  kbuf.iov_len = mdbx_env_get_maxkeysize(env);
+  if (kbuf.iov_len >= SIZE_MAX / 4) {
+    fprintf(stderr, "mdbx_env_get_maxkeysize failed, returns %zu\n",
+            kbuf.iov_len);
+    goto env_close;
+  }
+  kbuf.iov_len = (kbuf.iov_len + 1) * 2;
   kbuf.iov_base = malloc(kbuf.iov_len * 2);
   k0buf.iov_len = kbuf.iov_len;
   k0buf.iov_base = (char *)kbuf.iov_base + kbuf.iov_len;