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 X-Spam-Level: X-Spam-Status: No, score=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0E6C8C433B4 for ; Tue, 13 Apr 2021 07:37:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C19DC61370 for ; Tue, 13 Apr 2021 07:37:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241880AbhDMHhm (ORCPT ); Tue, 13 Apr 2021 03:37:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240983AbhDMHh1 (ORCPT ); Tue, 13 Apr 2021 03:37:27 -0400 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F302FC061574 for ; Tue, 13 Apr 2021 00:37:07 -0700 (PDT) Received: by mail-pj1-x102a.google.com with SMTP id b8-20020a17090a5508b029014d0fbe9b64so10234252pji.5 for ; Tue, 13 Apr 2021 00:37:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=feIVpLFE1LuKHeWl7tSeE0lvZCEn+UQxw9M1VcpRdeE=; b=GpFpHIOws7zBoR17dduUSnimAlwRHvxx/OuefV80lyVH1CZe0awKNyHIfsVLHNeo0X 3cYDuxCM0eBESd5+9NS1wVaPEROybF9n5jC/N51D+1dtMLh5kXikVKX3H3mCh01yvyGO jAmVEYVdniP5cOr0EmV16a9Xy6tPppTM9k9+q5rhENYm09T8dJulUKqIC40sPc3TJKVH BRc52Qn7KaFpLG5lElyujBhxUrtk0FdkAmw5uGpRiKBwl3575UV5CSNVAFnVGka20BUf asXjwGyUJLaBZPzaLF0mMxpzgMgIzr7NvYrA0epjBCfatBAa8/kXPc2LTw0tlTOTpLWP 4iXQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=feIVpLFE1LuKHeWl7tSeE0lvZCEn+UQxw9M1VcpRdeE=; b=XhL1pqNiFb0umqxz4Se6LjEaVQheBhi1gjOF49zTpVrp6h64VBvATU8ENDRpe0RlVh 0aRtMpfNnewSh7+jgKRRC/0s9aI08hin0xS0htOFuRhvRPftYYg/3KvV969UuetYT5Th wgUk0sro9TNdKieQF4Squzf8Uzi+AyQW29ZOMVxcBEt/F8RKMqiuExgGNUorJprmNm3l UpgO0nT3jncqlCbVKoSLKYtXnzzSe1b3QxyuyByiDtH74jp6lW4G0lZE4hEru/fxQ53t YNUlkmv43d2dBGkQqMApmSNLANI5HmXwXGu1Ux8PmLrSjYN4wum6icpnBUWDFnXEAoBW QdsA== X-Gm-Message-State: AOAM533Vntw1vACXgeQGkJ6hCG+W5Lxlhq60jzB0oxgJo1cvSoxtkS9W zn3GU6HjVgG7JVNouuG8U7YePgASkxA= X-Google-Smtp-Source: ABdhPJzHmfeiAiKreVQUvy1snqhX+SKDUcJq266SGaePzQJQXET5lmmrN6FC8Up4RSArSSb8ZztM9w== X-Received: by 2002:a17:902:e549:b029:e6:6b3a:49f7 with SMTP id n9-20020a170902e549b02900e66b3a49f7mr31951897plf.52.1618299427630; Tue, 13 Apr 2021 00:37:07 -0700 (PDT) Received: from edumazet1.svl.corp.google.com ([2620:15c:2c4:201:71d7:d843:bfe8:bec7]) by smtp.gmail.com with ESMTPSA id a3sm1349068pjq.36.2021.04.13.00.37.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Apr 2021 00:37:07 -0700 (PDT) From: Eric Dumazet To: Ingo Molnar , Mathieu Desnoyers , Peter Zijlstra Cc: "Paul E . McKenney" , Boqun Feng , Arjun Roy , linux-kernel , Eric Dumazet , Eric Dumazet Subject: [PATCH 2/3] rseq: remove redundant access_ok() Date: Tue, 13 Apr 2021 00:36:56 -0700 Message-Id: <20210413073657.2308450-3-eric.dumazet@gmail.com> X-Mailer: git-send-email 2.31.1.295.g9ea45b61b8-goog In-Reply-To: <20210413073657.2308450-1-eric.dumazet@gmail.com> References: <20210413073657.2308450-1-eric.dumazet@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eric Dumazet After commit 8f2817701492 ("rseq: Use get_user/put_user rather than __get_user/__put_user") we no longer need an access_ok() call from __rseq_handle_notify_resume() Signed-off-by: Eric Dumazet Cc: Mathieu Desnoyers Cc: Peter Zijlstra Cc: "Paul E. McKenney" Cc: Boqun Feng Cc: Arjun Roy Cc: Ingo Molnar --- kernel/rseq.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/rseq.c b/kernel/rseq.c index d2689ccbb132c0fc8ec0924008771e5ee1ca855e..57344f9abb43905c7dd2b6081205ff508d963e1e 100644 --- a/kernel/rseq.c +++ b/kernel/rseq.c @@ -273,8 +273,6 @@ void __rseq_handle_notify_resume(struct ksignal *ksig, struct pt_regs *regs) if (unlikely(t->flags & PF_EXITING)) return; - if (unlikely(!access_ok(t->rseq, sizeof(*t->rseq)))) - goto error; ret = rseq_ip_fixup(regs); if (unlikely(ret < 0)) goto error; -- 2.31.1.295.g9ea45b61b8-goog