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[23.128.96.33]) by mx.google.com with ESMTPS id cg10-20020a056a00290a00b00690d695b113si8490893pfb.337.2023.11.14.08.33.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Nov 2023 08:33:41 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.33 as permitted sender) client-ip=23.128.96.33; Authentication-Results: mx.google.com; dkim=pass header.i=@redhat.com header.s=mimecast20190719 header.b=FKfK0QBW; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.33 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by lipwig.vger.email (Postfix) with ESMTP id 237FF802F944; Tue, 14 Nov 2023 08:33:39 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at lipwig.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232297AbjKNQd2 (ORCPT + 29 others); Tue, 14 Nov 2023 11:33:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54506 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229822AbjKNQd1 (ORCPT ); Tue, 14 Nov 2023 11:33:27 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 524A5AD for ; Tue, 14 Nov 2023 08:33:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1699979603; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type; bh=tzfSnDUwga1tSh876/MWCFEyzy4dmGr84sjeijPXpA0=; b=FKfK0QBWtLMd32SKVFtX0lqjPqkbVISFwNkk4103Cy4OVd+Fjv4zxZe4fqmRpn/2Ddf8cu nBYTkxvXfYy1VFFTOwdDwDEl4BnUS/RX8TnAX8cE5TVeMHoIvBc/wDG36+nRaq9gONLgdG 5B38OuOAvKvtnOP54y/xN6a9K26qOSI= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-642-X_-LwZLeNp2U6b5NRUTECQ-1; Tue, 14 Nov 2023 11:33:19 -0500 X-MC-Unique: X_-LwZLeNp2U6b5NRUTECQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E97A8185A7A8; Tue, 14 Nov 2023 16:33:18 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.45.225.253]) by smtp.corp.redhat.com (Postfix) with SMTP id 17A771121306; Tue, 14 Nov 2023 16:33:16 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Tue, 14 Nov 2023 17:32:14 +0100 (CET) Date: Tue, 14 Nov 2023 17:32:11 +0100 From: Oleg Nesterov To: Alexei Starovoitov , Yonghong Song Cc: Chuyi Zhou , Daniel Borkmann , Kui-Feng Lee , linux-kernel@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH 0/3] bpf: kernel/bpf/task_iter.c: don't abuse next_thread() Message-ID: <20231114163211.GA874@redhat.com> MIME-Version: 1.0 Content-Disposition: inline User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lipwig.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (lipwig.vger.email [0.0.0.0]); Tue, 14 Nov 2023 08:33:39 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1782557831259960867 X-GMAIL-MSGID: 1782557831259960867 Compile tested. Every lockless usage of next_thread() was wrong, bpf/task_iter.c is the last user and is no exception. Oleg. --- kernel/bpf/task_iter.c | 29 +++++++++++------------------ 1 file changed, 11 insertions(+), 18 deletions(-)