[dpdk-stable] patch 'test/reorder: fix freeing mbuf twice' has been queued to LTS release 16.11.7

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to LTS release 16.11.7

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/16/18. So please
shout if anyone has objections.

Thanks.

Luca Boccassi

---
>From 43875bb9f80df9475f7a423af205156a338a1644 Mon Sep 17 00:00:00 2001
From: Reshma Pattan <reshma.pattan at intel.com>
Date: Fri, 4 May 2018 11:47:06 +0100
Subject: [PATCH] test/reorder: fix freeing mbuf twice

[ upstream commit ecd867faa860b41a154b3e24f6ea4536562234ab ]

mbufs are being freed twice in error, once in rte_mempool_put_bulk()
and then in rte_reorder_free(). Refactor the code so that we use
rte_reorder_free() to free mbufs in the reorder buffer, and use
rte_pktmbuf_free() to free any unused or drained mbufs.

Fixes: d0c9b58d71 ("app/test: new reorder unit test")

Signed-off-by: Reshma Pattan <reshma.pattan at intel.com>
Reviewed-by: David Hunt <david.hunt at intel.com>
---
 app/test/test_reorder.c | 47 +++++++++++++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 10 deletions(-)

diff --git a/app/test/test_reorder.c b/app/test/test_reorder.c
index 26dab0c2b..add455111 100644
--- a/app/test/test_reorder.c
+++ b/app/test/test_reorder.c
@@ -177,11 +177,11 @@ test_reorder_insert(void)
 	b = rte_reorder_create("test_insert", rte_socket_id(), size);
 	TEST_ASSERT_NOT_NULL(b, "Failed to create reorder buffer");
 
-	ret = rte_mempool_get_bulk(p, (void *)bufs, num_bufs);
-	TEST_ASSERT_SUCCESS(ret, "Error getting mbuf from pool");
-
-	for (i = 0; i < num_bufs; i++)
+	for (i = 0; i < num_bufs; i++) {
+		bufs[i] = rte_pktmbuf_alloc(p);
+		TEST_ASSERT_NOT_NULL(bufs[i], "Packet allocation failed\n");
 		bufs[i]->seqn = i;
+	}
 
 	/* This should fill up order buffer:
 	 * reorder_seq = 0
@@ -196,6 +196,7 @@ test_reorder_insert(void)
 			ret = -1;
 			goto exit;
 		}
+		bufs[i] = NULL;
 	}
 
 	/* early packet - should move mbufs to ready buf and move sequence window
@@ -210,6 +211,7 @@ test_reorder_insert(void)
 		ret = -1;
 		goto exit;
 	}
+	bufs[4] = NULL;
 
 	/* early packet from current sequence window - full ready buffer */
 	bufs[5]->seqn = 2 * size;
@@ -220,6 +222,7 @@ test_reorder_insert(void)
 		ret = -1;
 		goto exit;
 	}
+	bufs[5] = NULL;
 
 	/* late packet */
 	bufs[6]->seqn = 3 * size;
@@ -230,11 +233,15 @@ test_reorder_insert(void)
 		ret = -1;
 		goto exit;
 	}
+	bufs[6] = NULL;
 
 	ret = 0;
 exit:
-	rte_mempool_put_bulk(p, (void *)bufs, num_bufs);
 	rte_reorder_free(b);
+	for (i = 0; i < num_bufs; i++) {
+		if (bufs[i] != NULL)
+			rte_pktmbuf_free(bufs[i]);
+	}
 	return ret;
 }
 
@@ -250,6 +257,10 @@ test_reorder_drain(void)
 	int ret = 0;
 	unsigned i, cnt;
 
+	/* initialize all robufs to NULL */
+	for (i = 0; i < num_bufs; i++)
+		robufs[i] = NULL;
+
 	/* This would create a reorder buffer instance consisting of:
 	 * reorder_seq = 0
 	 * ready_buf: RB[size] = {NULL, NULL, NULL, NULL}
@@ -258,9 +269,6 @@ test_reorder_drain(void)
 	b = rte_reorder_create("test_drain", rte_socket_id(), size);
 	TEST_ASSERT_NOT_NULL(b, "Failed to create reorder buffer");
 
-	ret = rte_mempool_get_bulk(p, (void *)bufs, num_bufs);
-	TEST_ASSERT_SUCCESS(ret, "Error getting mbuf from pool");
-
 	/* Check no drained packets if reorder is empty */
 	cnt = rte_reorder_drain(b, robufs, 1);
 	if (cnt != 0) {
@@ -270,8 +278,11 @@ test_reorder_drain(void)
 		goto exit;
 	}
 
-	for (i = 0; i < num_bufs; i++)
+	for (i = 0; i < num_bufs; i++) {
+		bufs[i] = rte_pktmbuf_alloc(p);
+		TEST_ASSERT_NOT_NULL(bufs[i], "Packet allocation failed\n");
 		bufs[i]->seqn = i;
+	}
 
 	/* Insert packet with seqn 1:
 	 * reorder_seq = 0
@@ -279,6 +290,7 @@ test_reorder_drain(void)
 	 * OB[] = {1, NULL, NULL, NULL}
 	 */
 	rte_reorder_insert(b, bufs[1]);
+	bufs[1] = NULL;
 
 	cnt = rte_reorder_drain(b, robufs, 1);
 	if (cnt != 1) {
@@ -287,6 +299,8 @@ test_reorder_drain(void)
 		ret = -1;
 		goto exit;
 	}
+	if (robufs[0] != NULL)
+		rte_pktmbuf_free(robufs[i]);
 
 	/* Insert more packets
 	 * RB[] = {NULL, NULL, NULL, NULL}
@@ -294,18 +308,22 @@ test_reorder_drain(void)
 	 */
 	rte_reorder_insert(b, bufs[2]);
 	rte_reorder_insert(b, bufs[3]);
+	bufs[2] = NULL;
+	bufs[3] = NULL;
 
 	/* Insert more packets
 	 * RB[] = {NULL, NULL, NULL, NULL}
 	 * OB[] = {NULL, 2, 3, 4}
 	 */
 	rte_reorder_insert(b, bufs[4]);
+	bufs[4] = NULL;
 
 	/* Insert more packets
 	 * RB[] = {2, 3, 4, NULL}
 	 * OB[] = {NULL, NULL, 7, NULL}
 	 */
 	rte_reorder_insert(b, bufs[7]);
+	bufs[7] = NULL;
 
 	/* drained expected packets */
 	cnt = rte_reorder_drain(b, robufs, 4);
@@ -315,6 +333,10 @@ test_reorder_drain(void)
 		ret = -1;
 		goto exit;
 	}
+	for (i = 0; i < 3; i++) {
+		if (robufs[i] != NULL)
+			rte_pktmbuf_free(robufs[i]);
+	}
 
 	/*
 	 * RB[] = {NULL, NULL, NULL, NULL}
@@ -329,8 +351,13 @@ test_reorder_drain(void)
 	}
 	ret = 0;
 exit:
-	rte_mempool_put_bulk(p, (void *)bufs, num_bufs);
 	rte_reorder_free(b);
+	for (i = 0; i < num_bufs; i++) {
+		if (bufs[i] != NULL)
+			rte_pktmbuf_free(bufs[i]);
+		if (robufs[i] != NULL)
+			rte_pktmbuf_free(robufs[i]);
+	}
 	return ret;
 }
 
-- 
2.14.2