From: Olivier Matz <olivier.matz@6wind.com>
Date: Fri, 26 Jan 2018 08:40:55 +0000 (+0100)
Subject: mbuf: fix freeing of NULL mbuf when debug enabled
X-Git-Tag: spdx-start~1
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=af50d8b2df4fd62ccf092297ee3134d972df88e1;p=dpdk.git

mbuf: fix freeing of NULL mbuf when debug enabled

Do not panic when calling rte_pktmbuf_free(NULL) with mbuf debug
enabled, it is a valid operation.

Reported-by: Keith Wiles <keith.wiles@intel.com>
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
---

diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 4519fb3032..719d04dda2 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -1439,13 +1439,14 @@ rte_pktmbuf_free_seg(struct rte_mbuf *m)
  * segment is added back into its original mempool.
  *
  * @param m
- *   The packet mbuf to be freed.
+ *   The packet mbuf to be freed. If NULL, the function does nothing.
  */
 static inline void rte_pktmbuf_free(struct rte_mbuf *m)
 {
 	struct rte_mbuf *m_next;
 
-	__rte_mbuf_sanity_check(m, 1);
+	if (m != NULL)
+		__rte_mbuf_sanity_check(m, 1);
 
 	while (m != NULL) {
 		m_next = m->next;