block-dev:add additional sanity check.

Change-Id: Ib5b7cd93a50726b95c2e1b4c7eeedfefc824dd9c

diff --git a/lib/libbdev/bdev.c b/lib/libbdev/bdev.c
index fb4dfc239916ee8f6158d77efffdba626d9c78e9..b950368f512dfafa471e5831c7ad8c5e51aa3103 100644 (file)
--- 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;