From: Kees Jongenburger <kees.jongenburger@gmail.com>
Date: Tue, 24 Sep 2013 11:54:02 +0000 (+0200)
Subject: block-dev:add additional sanity check.
X-Git-Tag: v3.3.0~787
X-Git-Url: http://zhaoyanbai.com/repos/Bv9ARM.html?a=commitdiff_plain;h=6595e79da8214b536a8552e01cf1af21fe5a7bf1;p=minix.git

block-dev:add additional sanity check.

Change-Id: Ib5b7cd93a50726b95c2e1b4c7eeedfefc824dd9c
---

diff --git a/lib/libbdev/bdev.c b/lib/libbdev/bdev.c
index fb4dfc239..b950368f5 100644
--- a/lib/libbdev/bdev.c
+++ b/lib/libbdev/bdev.c
@@ -206,6 +206,7 @@ static int bdev_vrdwt_setup(int req, dev_t dev, u64_t pos, iovec_t *vec,
 	gvec[i].iov_grant = grant;
 	gvec[i].iov_size = vec[i].iov_size;
 
+	assert(vec[i].iov_size > 0);
 	assert((ssize_t) (size + vec[i].iov_size) > size);
 
 	size += vec[i].iov_size;