From: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
Date: Thu, 19 May 2016 12:36:35 +0000 (+0200)
Subject: mempool: avoid division by zero
X-Git-Tag: spdx-start~6865
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=125e39139b5f2854fb301123de3705049d1f9d68;p=dpdk.git

mempool: avoid division by zero

In function call rte_mempool_xmem_size, division by expression total_size
which may be zero has undefined behavior.

Coverity issue: 13243
Fixes: 148f963fb532 ("xen: core library changes")

Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
---

diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index 1ab670118b..b54de438a9 100644
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -239,6 +239,9 @@ rte_mempool_xmem_size(uint32_t elt_num, size_t total_elt_sz, uint32_t pg_shift)
 {
 	size_t obj_per_page, pg_num, pg_sz;
 
+	if (total_elt_sz == 0)
+		return 0;
+
 	if (pg_shift == 0)
 		return total_elt_sz * elt_num;