[dpdk-dev] [PATCH] mbuf:using sanity checks do not panic on null mbuf

[Keith Wiles <keith.wiles@intel.com>]

The rte_pktmbuf_free() allows for NULL mbuf pointer, but
when sanity check is enabled it will panic with null pointer.

Signed-off-by: Keith Wiles <keith.wiles@intel.com>
---
 lib/librte_mbuf/rte_mbuf.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 7543662f7..58184c4f4 100644
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -205,8 +205,9 @@ rte_mbuf_sanity_check(const struct rte_mbuf *m, int is_header)
 	const struct rte_mbuf *m_seg;
 	unsigned int nb_segs;
 
-	if (m == NULL)
-		rte_panic("mbuf is NULL\n");
+	/* Calling with NULL is valid in the API */
+	if (!m)
+		return;
 
 	/* generic checks */
 	if (m->pool == NULL)
@@ -243,6 +244,11 @@ rte_pktmbuf_dump(FILE *f, const struct rte_mbuf *m, unsigned dump_len)
 
 	__rte_mbuf_sanity_check(m, 1);
 
+	if (!m || !f) {
+		fprintf(stderr, "MBUF and/or FILE pointer is NULL\n");
+		return;
+	}
+
 	fprintf(f, "dump mbuf at %p, iova=%"PRIx64", buf_len=%u\n",
 	       m, (uint64_t)m->buf_iova, (unsigned)m->buf_len);
 	fprintf(f, "  pkt_len=%"PRIu32", ol_flags=%"PRIx64", nb_segs=%u, "
-- 
2.14.1