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 33911C3DA7D for ; Tue, 3 Jan 2023 14:33:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237560AbjACOc6 (ORCPT ); Tue, 3 Jan 2023 09:32:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237887AbjACOcf (ORCPT ); Tue, 3 Jan 2023 09:32:35 -0500 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3CA95EE23 for ; Tue, 3 Jan 2023 06:32:34 -0800 (PST) Received: by mail-pl1-x633.google.com with SMTP id c2so5199573plc.5 for ; Tue, 03 Jan 2023 06:32:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:subject:from:to:content-language :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to; bh=CEOXEFsPClBQb8kDE/4Kms3/TwAvRgkmx5Ov7Z/Nc2E=; b=3KwFq++86WZT0CKs5Rj1YUMKBELARNl3dZ815jA4hrdxhP1QboZffBbjXkmSxjbCx/ Leet4cAyNToZZVlpucdBNsw8gytFKCxDO3722CjZj9Xz0Cvng1o5QrV63QiCKTdxnq7P 8MXrt8exG+7CONyFGSmtS3PR49SRv2Vcr1XjZ+nMUMiRBGvdUVvPRhzE2O8eeNox/oh3 wiW2V622Dq9w7DfyxHh9X7//CeNjqaZ0JqFpwYY5oLX6iaoqlg1KPzwOa9La4CKzqUCW pIGMS7RIlCswhiLa0ShUcJu1t3/OalAce8QOhmzkQsO3sq7wXbVuAtbmTb/5sTvT42O1 jUtw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:subject:from:to:content-language :user-agent:mime-version:date:message-id:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=CEOXEFsPClBQb8kDE/4Kms3/TwAvRgkmx5Ov7Z/Nc2E=; b=2+RNFQqGIW1KuLjjp56ibC2uyI8l0y8/F9v3S17C5x2c/BEk+KXiZp94UbzZXLegST qx5pa5L4i0dfV20dtPih+eicDb2LIG3qcKY34m/ijnBkPOtd2XH64cO5Ac2FVq/xNiXD GFP9Sql5kbo9ynIzKmWi326UT2YqXLp2lelGae4UlFNF4U4/K2CY19nMkEs2kwxIyaqS DwwPVr8xIIVM9MS0pOCu+gPa96P080d8ICaImD6E2Fv6JQk7056MnF7wdKIS2gbAvImh udjSivD6C/3iZIwKSCEsn0MxWyhppsEUINhU3ccUf089CeOk7DeZXpl+g3A69r630Ual nTGQ== X-Gm-Message-State: AFqh2kqGf5qeYKU2sLNl35WsOiLfUA/PVzjJgs1Lp6sLRGBerIYg39/q RI8Skyg4/NFIph5ygTG84axMNVvf3/tY/WN6 X-Google-Smtp-Source: AMrXdXtvX3EOYX6siVHTan3dENN2bwWdkYQRg9g4SNvsaKiwsgWSQv1Eo3lwXfQ73lsyFX1YU3UU3g== X-Received: by 2002:a17:902:a512:b0:192:5c3e:8952 with SMTP id s18-20020a170902a51200b001925c3e8952mr10199318plq.2.1672756353382; Tue, 03 Jan 2023 06:32:33 -0800 (PST) Received: from [192.168.1.136] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id s9-20020a170902ea0900b0017f57787a4asm22387144plg.229.2023.01.03.06.32.32 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Jan 2023 06:32:32 -0800 (PST) Message-ID: <1d287a8e-3c3f-4a8d-f6cc-8199b53ae886@kernel.dk> Date: Tue, 3 Jan 2023 07:32:31 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:102.0) Gecko/20100101 Thunderbird/102.6.0 Content-Language: en-US To: io-uring From: Jens Axboe Subject: [PATCH] io_uring/io-wq: free worker if task_work creation is canceled Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org If we cancel the task_work, the worker will never come into existance. As this is the last reference to it, ensure that we get it freed appropriately. Cc: stable@vger.kernel.org Reported-by: 진호 Signed-off-by: Jens Axboe --- diff --git a/io_uring/io-wq.c b/io_uring/io-wq.c index 6f1d0e5df23a..992dcd9f8c4c 100644 --- a/io_uring/io-wq.c +++ b/io_uring/io-wq.c @@ -1230,6 +1230,7 @@ static void io_wq_cancel_tw_create(struct io_wq *wq) worker = container_of(cb, struct io_worker, create_work); io_worker_cancel_cb(worker); + kfree(worker); } } -- Jens Axboe