From 4b3e65682d1895a651653d82f05c66ead8dfcf3b Mon Sep 17 00:00:00 2001
From: Wilco Dijkstra <wilco.dijkstra@arm.com>
Date: Sat, 2 Aug 2025 17:18:57 +0000
Subject: [PATCH] Improve MALLOC_DEBUG

---
 malloc/malloc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/malloc/malloc.c b/malloc/malloc.c
index 2ac562506e..415c59a875 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -3460,8 +3460,6 @@ __libc_free (void *mem)
   if (__glibc_unlikely (misaligned_chunk (p)))
     return malloc_printerr_tail ("free(): invalid pointer");
 
-  check_inuse_chunk (arena_for_chunk (p), p);
-
 #if USE_TCACHE
   if (__glibc_likely (size < mp_.tcache_max_bytes && tcache != NULL))
     {
@@ -4679,6 +4677,8 @@ _int_free_merge_chunk (mstate av, mchunkptr p, INTERNAL_SIZE_T size)
 {
   mchunkptr nextchunk = chunk_at_offset(p, size);
 
+  check_inuse_chunk (av, p);
+
   /* Lightweight tests: check whether the block is already the
      top block.  */
   if (__glibc_unlikely (p == av->top))
-- 
2.47.2