From: Hongfu Li <hongfu.li@linux.dev>
To: hannes@cmpxchg.org, mhocko@kernel.org, roman.gushchin@linux.dev,
shakeel.butt@linux.dev, muchun.song@linux.dev,
akpm@linux-foundation.org
Cc: cgroups@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, hongfu.li@linux.dev,
Hongfu Li <lihongfu@kylinos.cn>
Subject: [PATCH] mm/memcg: check kzalloc_node() return in memcg1_init()
Date: Tue, 21 Jul 2026 18:09:16 +0800 [thread overview]
Message-ID: <20260721100916.76822-1-hongfu.li@linux.dev> (raw)
From: Hongfu Li <lihongfu@kylinos.cn>
Add NULL check for per-node kzalloc_node() allocations in memcg1_init().
Skip the NUMA node when allocation fails. All users of
soft_limit_tree.rb_tree_per_node[] safely handle NULL entries, only losing
soft-limit tracking for that node.
Signed-off-by: Hongfu Li <lihongfu@kylinos.cn>
---
mm/memcontrol-v1.c | 2 +++++
1 file changed, 2 insertions(+)
diff --git a/mm/memcontrol-v1.c b/mm/memcontrol-v1.c
index 2dc599484d00..33ea693c9281 100644
--- a/mm/memcontrol-v1.c
+++ b/mm/memcontrol-v1.c
@@ -2566,6 +2566,8 @@ static int __init memcg1_init(void)
struct mem_cgroup_tree_per_node *rtpn;
rtpn = kzalloc_node(sizeof(*rtpn), GFP_KERNEL, node);
+ if (!rtpn)
+ continue;
rtpn->rb_root = RB_ROOT;
rtpn->rb_rightmost = NULL;
--
2.54.0
reply other threads:[~2026-07-21 10:09 UTC|newest]
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