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DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1784628571; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=rtXOsg2ueYVGRLW3PtOke69mX+SA5v4SjKosXuE4yoQ=; b=q935BXKHNaNk7Cj1nFZHQed1RmkLiDzz5keIA85fn4hJm5pJQbJciDxylDv2c9ZmtJnJ8M TCnhPv9od99ouSEGlU0OQUNDGTfcI50VVTvBgElzJX2ybjNcgjGbJpp3YKlht7eK7tRcYT Xtjzse3jV/ssqqPojYUZctyv2V6zyaE= From: Hongfu Li 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 Subject: [PATCH] mm/memcg: check kzalloc_node() return in memcg1_init() Date: Tue, 21 Jul 2026 18:09:16 +0800 Message-ID: <20260721100916.76822-1-hongfu.li@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 827B41C000A X-Stat-Signature: jbo71yk3krcxcwmic6oy33ywbrkwnoco X-Rspam-User: X-HE-Tag: 1784628573-407220 X-HE-Meta: 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 S7UPV+xo oFX/B00z2AsRBvucoL5IMbRaxQh/ZyXOZnLZoOi49Mbf5IlZ2x0lMuCyn2ss/6TUbuUMigDM3mQA9NxgmksMx/ZZg5ViKxRvDoF+K2V/Tk/lZbsaPlQ5sNnJnUgT7lTsfx/5M7X1MoE5j1wA8MFKO+PJQbOliiQEnZszUJOWIdJSVsrk22Hoh2gDhTYRIui3cxVL+6ME7ofSvirp3K/66E4YmIqWSmrOVjH6ChkuuHYKmXi9JSaXapf26Hg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Hongfu Li 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 --- 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