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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 913A3C761A6 for ; Wed, 5 Apr 2023 00:20:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236522AbjDEAUV (ORCPT ); Tue, 4 Apr 2023 20:20:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229748AbjDEAUS (ORCPT ); Tue, 4 Apr 2023 20:20:18 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 387A33AA5; Tue, 4 Apr 2023 17:20:18 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id CB12263AB2; Wed, 5 Apr 2023 00:20:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 25176C4339C; Wed, 5 Apr 2023 00:20:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1680654017; bh=RCqjBwlDw+GoZaYu/kwObCxusUPUKeiFEtjTeqty5Tc=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=oBS0AOkUNEeUG3o9FQLIk9SRZTX5k2JVwZD+GO8w+hlmWaO44ib+/DsFdN0Mxl4NM HqD3vyaOjb1ozI+Gm/FrXy/ivTFoQm6E92rOm4cyJ9TEiRqFj0Bc9LZDTrf9qNBqkP B0OChkdc3GoIV2ud8qCdxO/GW7Hj7jKs2LooMVfE7PR4KGy+JXdHCw5za2ZUBM9Rk2 tcZPgL4zyAYFv2IwuemxF03dFeu9vMWyg0qtx4IcUMr5kZHEsqlDFCcPTtcui/RZwV yUgDtM3diHLJ2tnJcVnBmSxg9SOL93keMShfzLrOr3t+g6SX4OhHlIRha/AdeZJkVD G+UaloMqpI84A== Received: from aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (localhost.localdomain [127.0.0.1]) by aws-us-west-2-korg-oddjob-1.ci.codeaurora.org (Postfix) with ESMTP id 02E85C395C5; Wed, 5 Apr 2023 00:20:17 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH bpf-next] kallsyms: Disable preemption for find_kallsyms_symbol_value From: patchwork-bot+netdevbpf@kernel.org Message-Id: <168065401700.950.3027124778713262383.git-patchwork-notify@kernel.org> Date: Wed, 05 Apr 2023 00:20:17 +0000 References: <20230403220254.2191240-1-jolsa@kernel.org> In-Reply-To: <20230403220254.2191240-1-jolsa@kernel.org> To: Jiri Olsa Cc: mcgrof@kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, asavkov@redhat.com, bpf@vger.kernel.org, linux-modules@vger.kernel.org, linux-kernel@vger.kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@chromium.org, sdf@google.com, haoluo@google.com, pmladek@suse.com, thunder.leizhen@huawei.com, vmalik@redhat.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello: This patch was applied to bpf/bpf-next.git (master) by Andrii Nakryiko : On Tue, 4 Apr 2023 00:02:54 +0200 you wrote: > Artem reported suspicious RCU usage [1]. The reason is that verifier > calls find_kallsyms_symbol_value with preemption enabled which will > trigger suspicious RCU usage warning in rcu_dereference_sched call. > > Disabling preemption in find_kallsyms_symbol_value and adding > __find_kallsyms_symbol_value function. > > [...] Here is the summary with links: - [bpf-next] kallsyms: Disable preemption for find_kallsyms_symbol_value https://git.kernel.org/bpf/bpf-next/c/d099f594ad56 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html