[dpdk-dev] [PATCH 2/2] malloc: fix realloc padded element size

[Xueming Li]

When resize a memory with next element, the original element size grows.
If the orginal element has padding, the real inner element size didn't
grow as well and this causes trailer verification failure when malloc
debug enabled.

Fixes: af75078fece3 ("first public release")
Cc: stable at dpdk.org

Signed-off-by: Xueming Li <xuemingl at mellanox.com>
---
 lib/librte_eal/common/malloc_elem.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/librte_eal/common/malloc_elem.c b/lib/librte_eal/common/malloc_elem.c
index 658c9b5b79..afacb1813c 100644
--- a/lib/librte_eal/common/malloc_elem.c
+++ b/lib/librte_eal/common/malloc_elem.c
@@ -307,6 +307,11 @@ split_elem(struct malloc_elem *elem, struct malloc_elem *split_pt)
 	elem->next = split_pt;
 	elem->size = old_elem_size;
 	set_trailer(elem);
+	if (elem->pad) {
+		/* Update inner padding inner element size. */
+		elem = RTE_PTR_ADD(elem, elem->pad);
+		elem->size = old_elem_size - elem->pad;
+	}
 }
 
 /*
-- 
2.17.1