linux-kernel - [PATCH] mm/vmalloc: Use kmalloc

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Message-ID: <20251018201207.27441-1-mehdi.benhadjkhelifa@gmail.com>
Date: Sat, 18 Oct 2025 21:11:48 +0100
From: Mehdi Ben Hadj Khelifa <mehdi.benhadjkhelifa@...il.com>
To: akpm@...ux-foundation.org,
	urezki@...il.com
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	skhan@...uxfoundation.org,
	david.hunter.linux@...il.com,
	linux-kernel-mentees@...ts.linuxfoundation.org,
	khalid@...nel.org,
	Mehdi Ben Hadj Khelifa <mehdi.benhadjkhelifa@...il.com>
Subject: [PATCH] mm/vmalloc: Use kmalloc_array() instead of kmalloc()

The number of NUMA nodes (nr_node_ids) is bounded, so overflow is not a
practical concern here. However, using kmalloc_array() better reflects the
intent to allocate an array of unsigned ints, and improves consistency with
other NUMA-related allocations.

No functional change intended.

Signed-off-by: Mehdi Ben Hadj Khelifa <mehdi.benhadjkhelifa@...il.com>
---
 mm/vmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 798b2ed21e46..697bc171b013 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -5055,7 +5055,7 @@ static int vmalloc_info_show(struct seq_file *m, void *p)
 	unsigned int *counters;
 
 	if (IS_ENABLED(CONFIG_NUMA))
-		counters = kmalloc(nr_node_ids * sizeof(unsigned int), GFP_KERNEL);
+		counters = kmalloc_array(nr_node_ids, sizeof(unsigned int), GFP_KERNEL);
 
 	for_each_vmap_node(vn) {
 		spin_lock(&vn->busy.lock);
-- 
2.51.1.dirty