[dpdk-stable] patch 'mempool: fix crash when handler not found' has been queued to stable release 17.02.1

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 17.02.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/28/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From 1cc37260a96cf9ad6118c78885f18441eaf173eb Mon Sep 17 00:00:00 2001
From: Shreyansh Jain <shreyansh.jain at nxp.com>
Date: Fri, 31 Mar 2017 11:05:35 +0530
Subject: [PATCH] mempool: fix crash when handler not found

[ upstream commit 44cebef721a644dd4139596942d24d0967c1cfb3 ]

In case the stack or ring mempool handler are compiled as shared
library and not linked in with test binary, segfault is reported.
This is because return value of rte_mempool_set_ops_byname is not
being checked in rte_mempool_ops_alloc.

This patch handles error returned from rte_mempool_set_ops_byname
when a mempool is not found.

Fixes: 449c49b93a6b ("mempool: support handler operations")

Signed-off-by: Shreyansh Jain <shreyansh.jain at nxp.com>
Acked-by: Olivier Matz <olivier.matz at 6wind.com>
---
 lib/librte_mempool/rte_mempool.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c
index 1c2aed8..5a07818 100644
--- a/lib/librte_mempool/rte_mempool.c
+++ b/lib/librte_mempool/rte_mempool.c
@@ -868,6 +868,7 @@ rte_mempool_create(const char *name, unsigned n, unsigned elt_size,
 	rte_mempool_obj_cb_t *obj_init, void *obj_init_arg,
 	int socket_id, unsigned flags)
 {
+	int ret;
 	struct rte_mempool *mp;
 
 	mp = rte_mempool_create_empty(name, n, elt_size, cache_size,
@@ -880,13 +881,16 @@ rte_mempool_create(const char *name, unsigned n, unsigned elt_size,
 	 * set the correct index into the table of ops structs.
 	 */
 	if ((flags & MEMPOOL_F_SP_PUT) && (flags & MEMPOOL_F_SC_GET))
-		rte_mempool_set_ops_byname(mp, "ring_sp_sc", NULL);
+		ret = rte_mempool_set_ops_byname(mp, "ring_sp_sc", NULL);
 	else if (flags & MEMPOOL_F_SP_PUT)
-		rte_mempool_set_ops_byname(mp, "ring_sp_mc", NULL);
+		ret = rte_mempool_set_ops_byname(mp, "ring_sp_mc", NULL);
 	else if (flags & MEMPOOL_F_SC_GET)
-		rte_mempool_set_ops_byname(mp, "ring_mp_sc", NULL);
+		ret = rte_mempool_set_ops_byname(mp, "ring_mp_sc", NULL);
 	else
-		rte_mempool_set_ops_byname(mp, "ring_mp_mc", NULL);
+		ret = rte_mempool_set_ops_byname(mp, "ring_mp_mc", NULL);
+
+	if (ret)
+		goto fail;
 
 	/* call the mempool priv initializer */
 	if (mp_init)
-- 
1.9.0