[PATCH 2/2] lib/graph: rte_malloc for cache-aligned structs

[Marat Khalili <marat.khalili@huawei.com>]

This was flagged by undefined behaviour sanitizer: struct
rte_graph_cluster_stats is declared as `__rte_cache_aligned` but was
allocated using stdlib realloc which caused misaligned allocation. More
than one test needs to be executed in series in order to reproduce the
problem using graph_autotest, e.g:

    app/dpdk-test --no-huge --no-pci -m128 graph_autotest graph_autotest

First sanitizer message  (similar ones follow):

    lib/graph/graph_stats.c:209:13: runtime error: member access within
    misaligned address 0x606000008ea0 for type 'struct
    rte_graph_cluster_stats', which requires 64 byte alignment

To fix the issue replace realloc calls with rte_malloc and rte_realloc
specifying correct alignment, use rte_free to free the result.

Signed-off-by: Marat Khalili <marat.khalili@huawei.com>
---
 lib/graph/graph_stats.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/lib/graph/graph_stats.c b/lib/graph/graph_stats.c
index 57cd72e7cc..7ae8ee4987 100644
--- a/lib/graph/graph_stats.c
+++ b/lib/graph/graph_stats.c
@@ -203,7 +203,7 @@ stats_mem_init(struct cluster *cluster,
 	cluster_node_size += cluster->nb_graphs * sizeof(struct rte_node *);
 	cluster_node_size = RTE_ALIGN(cluster_node_size, RTE_CACHE_LINE_SIZE);
 
-	stats = realloc(NULL, sz);
+	stats = rte_malloc(NULL, sz, RTE_CACHE_LINE_SIZE);
 	if (stats) {
 		memset(stats, 0, sz);
 		stats->fn = fn;
@@ -248,7 +248,8 @@ stats_mem_populate(struct rte_graph_cluster_stats **stats_in,
 	}
 
 	/* Hey, it is a new node, allocate space for it in the reel */
-	stats = realloc(stats, stats->sz + stats->cluster_node_size);
+	stats = rte_realloc(stats, stats->sz + stats->cluster_node_size,
+		RTE_CACHE_LINE_SIZE);
 	if (stats == NULL)
 		SET_ERR_JMP(ENOMEM, err, "Realloc failed");
 	*stats_in = NULL;
@@ -301,7 +302,7 @@ stats_mem_populate(struct rte_graph_cluster_stats **stats_in,
 
 	return 0;
 free:
-	free(stats);
+	rte_free(stats);
 err:
 	return -rte_errno;
 }
@@ -309,7 +310,7 @@ stats_mem_populate(struct rte_graph_cluster_stats **stats_in,
 static void
 stats_mem_fini(struct rte_graph_cluster_stats *stats)
 {
-	free(stats);
+	rte_free(stats);
 }
 
 static void
-- 
2.43.0