From 98f5fd5e36fbc67bc07bc072c6a7cb1d89374396 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Thu, 23 Jun 2016 10:00:01 -0400
Subject: [PATCH] common/buffer: assert that we do not exceed IOV_MAX in
 prepare_iov

Signed-off-by: Sage Weil <sage@redhat.com>
---
 src/common/buffer.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/common/buffer.cc b/src/common/buffer.cc
index b75136f9f55c7..785a210fb9631 100644
--- a/src/common/buffer.cc
+++ b/src/common/buffer.cc
@@ -2273,6 +2273,7 @@ int buffer::list::write_fd(int fd, uint64_t offset) const
 
 void buffer::list::prepare_iov(std::vector<iovec> *piov) const
 {
+  assert(_buffers.size() <= IOV_MAX);
   piov->resize(_buffers.size());
   unsigned n = 0;
   for (std::list<buffer::ptr>::const_iterator p = _buffers.begin();
-- 
2.39.5