From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8A8ACA0EE4 for ; Mon, 18 Aug 2025 17:01:58 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 3D1278E004E; Mon, 18 Aug 2025 13:01:58 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3A8818E0013; Mon, 18 Aug 2025 13:01:58 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 298E98E004E; Mon, 18 Aug 2025 13:01:58 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 169728E0013 for ; Mon, 18 Aug 2025 13:01:58 -0400 (EDT) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id B95501409F8 for ; Mon, 18 Aug 2025 17:01:57 +0000 (UTC) X-FDA: 83790495474.18.8BEBB03 Received: from out-188.mta1.migadu.com (out-188.mta1.migadu.com [95.215.58.188]) by imf07.hostedemail.com (Postfix) with ESMTP id ECF5E4000E for ; Mon, 18 Aug 2025 17:01:55 +0000 (UTC) Authentication-Results: imf07.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=stwTv26k; spf=pass (imf07.hostedemail.com: domain of roman.gushchin@linux.dev designates 95.215.58.188 as permitted sender) smtp.mailfrom=roman.gushchin@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1755536516; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=spKMQn7nIVpT0/mjP9As0UlCNDUJOgYkELPXiq5D32U=; b=QbMbdRPrY30ui2MnTL2A6rZfTTNX7MMgQrOosmZNEosg60pXjBFAKovJUCtA0jdjN05Eo+ /BJlRqG9XyZnWY2uYLvk94uFTHhCJrtR+T7/h2WmNp8yi20gjbkgGiVU5QW9bU3yMrYFGv rQ8/OPTQ0wRxtbQwlVdR4+4U/mscLkM= ARC-Authentication-Results: i=1; imf07.hostedemail.com; dkim=pass header.d=linux.dev header.s=key1 header.b=stwTv26k; spf=pass (imf07.hostedemail.com: domain of roman.gushchin@linux.dev designates 95.215.58.188 as permitted sender) smtp.mailfrom=roman.gushchin@linux.dev; dmarc=pass (policy=none) header.from=linux.dev ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1755536516; a=rsa-sha256; cv=none; b=D4rftUMxScyAnETFsKD1/st5sW0ZzgDNpxW7s7dwxSTOBAO3kL7VN6l+Bggv5OA9DaZ6/7 STWq5JfkWIBWzoduKdyoPsWx8W4E6bhEDBNCsFKc2yOmSGyw81qhU1S5RzMtFlsr6JNUDD gr11pLyT+uA+dvYIa1ubAaebSH2oq/I= X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1755536514; 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: in-reply-to:in-reply-to:references:references; bh=spKMQn7nIVpT0/mjP9As0UlCNDUJOgYkELPXiq5D32U=; b=stwTv26ksBnQzC/fOPKoIoZj8nFwNHuCsH2a3/p+NiLavlZyC/iWksVguM9b1cmfmHwuht 4qxDw5kejSx5NB86vwRw7QmLxeji0zoV/T7OPU/5t5WVbx/yXBGUQMmmory7rKcWcW7Hah GM6PJtse+KnlXgK7IcEtdM0FKn5dcm8= From: Roman Gushchin To: linux-mm@kvack.org, bpf@vger.kernel.org Cc: Suren Baghdasaryan , Johannes Weiner , Michal Hocko , David Rientjes , Matt Bobrowski , Song Liu , Kumar Kartikeya Dwivedi , Alexei Starovoitov , Andrew Morton , linux-kernel@vger.kernel.org, Roman Gushchin Subject: [PATCH v1 02/14] bpf: mark struct oom_control's memcg field as TRUSTED_OR_NULL Date: Mon, 18 Aug 2025 10:01:24 -0700 Message-ID: <20250818170136.209169-3-roman.gushchin@linux.dev> In-Reply-To: <20250818170136.209169-1-roman.gushchin@linux.dev> References: <20250818170136.209169-1-roman.gushchin@linux.dev> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: ECF5E4000E X-Rspam-User: X-Stat-Signature: qahddmp4sdgsinkcnw5gsfcjjwsxtsjf X-Rspamd-Server: rspam09 X-HE-Tag: 1755536515-715973 X-HE-Meta: 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 VuBvwaTa k35qYOau9wNgvga0Z1GZVJAD7EYoD7CZILp1emm2vaEMtgm/WFU6etWSx2WM8rg3icOHk17e1Jw2PJq3O7n086VxCeqAANC5wTylXVmfL+ovb/UrZvaXh6ulCyg1Nqwm4uI+iTB/4sp3Sr8JOipSXGepvlR70vFbBJYrYQOElKO5qYPFidku7SmqxA4XQKs7JknyuKzz94S6XVppnvUGGYx3AiyCL12gJNxq+OWVfyZHjbRfKgchQYhRKvA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Struct oom_control is used to describe the OOM context. It's memcg field defines the scope of OOM: it's NULL for global OOMs and a valid memcg pointer for memcg-scoped OOMs. Teach bpf verifier to recognize it as trusted or NULL pointer. It will provide the bpf OOM handler a trusted memcg pointer, which for example is required for iterating the memcg's subtree. Signed-off-by: Roman Gushchin --- kernel/bpf/verifier.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 169845710c7e..b5153c843028 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -7035,6 +7035,10 @@ BTF_TYPE_SAFE_TRUSTED_OR_NULL(struct socket) { struct sock *sk; }; +BTF_TYPE_SAFE_TRUSTED_OR_NULL(struct oom_control) { + struct mem_cgroup *memcg; +}; + static bool type_is_rcu(struct bpf_verifier_env *env, struct bpf_reg_state *reg, const char *field_name, u32 btf_id) @@ -7075,6 +7079,7 @@ static bool type_is_trusted_or_null(struct bpf_verifier_env *env, { BTF_TYPE_EMIT(BTF_TYPE_SAFE_TRUSTED_OR_NULL(struct socket)); BTF_TYPE_EMIT(BTF_TYPE_SAFE_TRUSTED_OR_NULL(struct dentry)); + BTF_TYPE_EMIT(BTF_TYPE_SAFE_TRUSTED_OR_NULL(struct oom_control)); return btf_nested_type_is_trusted(&env->log, reg, field_name, btf_id, "__safe_trusted_or_null"); -- 2.50.1