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=-6.5 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NORMAL_HTTP_TO_IP,NUMERIC_HTTP_ADDR,SPF_HELO_NONE,SPF_PASS autolearn=no 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 28EC5C433ED for ; Fri, 30 Apr 2021 15:12:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E9C6A6143D for ; Fri, 30 Apr 2021 15:12:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230291AbhD3PMt (ORCPT ); Fri, 30 Apr 2021 11:12:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230164AbhD3PMq (ORCPT ); Fri, 30 Apr 2021 11:12:46 -0400 Received: from mail-lf1-x136.google.com (mail-lf1-x136.google.com [IPv6:2a00:1450:4864:20::136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D6AEC06174A; Fri, 30 Apr 2021 08:11:58 -0700 (PDT) Received: by mail-lf1-x136.google.com with SMTP id x2so4680465lff.10; Fri, 30 Apr 2021 08:11:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=G4XAE3TlEyF9fA4m3YMw+2jvC4+14CWS6gkqAplYmdk=; b=kgb5MnVXCrQeptQyCf2PPt/HryccLSOVl5xJax2QZe2DvhmR53i+WAw6ZhidJ6KWvz Zirmc299HvsXIOP4kKoZI+jgIaqB9zvhQJlCLqWG8Bv/k6cos2zcVk0FBVzgMm1IBNYb 2rAS5aAgWKFTvQhBM9ml6t6M84eRLtbjLz3j5EgZjm9fBWu7u7JXzJC+8CGnziYbvJee TaFjA5HrepyE4xNAPDyULQ/4YyL4YgM1RnAgsO+DpirxQ3w8Ngaclhxv+etPOLksNMCd zbIC4YKoTzfHmk6svVcGn8HntNXriwNvO7uZBElaw9EcZ4/iuv4RzcYIKQ7f30PKfVp8 3M1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=G4XAE3TlEyF9fA4m3YMw+2jvC4+14CWS6gkqAplYmdk=; b=HmPbyCpKemyGUhTbOWfnzHFbkuJpWx5PfHjPIczBbf1YhtAg9rRprihUb8ITgBf9EI OxgVWiOxym9vc0VlrSlTVFzhVwetI5xkQaYFy4lF3BcfNUn6DRdzz3MgIHHnNAX+gavB pWU+YFWqQJj8PfrFkbWvD68kmB8zmT1qevwXfO+eOucXvuRilEXvn6D3XGG9939tCsFh TBujwu5Z4m3ZcxTifQJQujGfz0BhYu/KB8g+fS8L3ess4z0ijRQQ1LcWgPXc2V04DZ3a sCADKIkl8kP220D764Te48pMlpXFW3WP+AuaXraCo/1GO3o6Mh8NNLyxRFxwwJzAR6cB Sa1g== X-Gm-Message-State: AOAM533GN5dSABnasLqBTLqmRccGfKQOBelroxVkxbJNsp69M9SWPgz5 5d3k8Rr0aYvcbxnRtKHFqHt2KfkTNSNN32WXJaE= X-Google-Smtp-Source: ABdhPJzvAMchvkMNSOX0H33boDmHIaru7yPnDVUZBiHyXTzdfHbssplJZIqibTS4TmDKn2pQ96Z6GY8+N92dbMf0uAs= X-Received: by 2002:a05:6512:3b07:: with SMTP id f7mr3724203lfv.470.1619795516626; Fri, 30 Apr 2021 08:11:56 -0700 (PDT) MIME-Version: 1.0 References: <0000000000000c97e505bdd1d60e@google.com> <53a22ab4-7a2d-4ebd-802d-9d1b4ce4e087n@googlegroups.com> <6d682c9d-a3ec-ec74-c8be-89e1ea5e24ca@gmail.com> In-Reply-To: <6d682c9d-a3ec-ec74-c8be-89e1ea5e24ca@gmail.com> From: Palash Oswal Date: Fri, 30 Apr 2021 20:41:45 +0530 Message-ID: Subject: Re: INFO: task hung in io_uring_cancel_sqpoll To: Pavel Begunkov Cc: Jens Axboe , io-uring@vger.kernel.org, LKML , syzbot+11bf59db879676f59e52@syzkaller.appspotmail.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Apr 30, 2021 at 8:37 PM Pavel Begunkov wrote: > > On 4/30/21 4:02 PM, Palash Oswal wrote: > > On Fri, Apr 30, 2021 at 8:03 PM Pavel Begunkov wrote: > >> > >> On 4/30/21 3:21 PM, Palash Oswal wrote: > >>> On Thursday, March 18, 2021 at 9:40:21 PM UTC+5:30 syzbot wrote: > >>>> > >>>> Hello, > >>>> > >>>> syzbot found the following issue on: > >>>> > >>>> HEAD commit: 0d7588ab riscv: process: Fix no prototype for arch_dup_tas.. > >>>> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes > >>>> console output: https://syzkaller.appspot.com/x/log.txt?x=12dde5aed00000 > >>>> kernel config: https://syzkaller.appspot.com/x/.config?x=81c0b708b31626cc > >>>> dashboard link: https://syzkaller.appspot.com/bug?extid=11bf59db879676f59e52 > >>>> userspace arch: riscv64 > >>>> CC: [asml.s...@gmail.com ax...@kernel.dk io-u...@vger.kernel.org linux-...@vger.kernel.org] > >>>> > >>>> Unfortunately, I don't have any reproducer for this issue yet. > >> > >> There was so many fixes in 5.12 after this revision, including sqpoll > >> cancellation related... Can you try something more up-to-date? Like > >> released 5.12 or for-next > >> > > > > The reproducer works for 5.12. > > Ok, any chance you have syz repro as well? it's easier to read > > > Syzkaller reproducer: # {Threaded:false Collide:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: Fault:false FaultCall:-1 FaultNth:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false UseTmpDir:false HandleSegv:false Repro:false Trace:false} r0 = syz_io_uring_setup(0x7987, &(0x7f0000000200)={0x0, 0x0, 0x2}, &(0x7f0000400000/0xc00000)=nil, &(0x7f0000ffd000/0x3000)=nil, &(0x7f00000000c0)=0x0, &(0x7f00000001c0)=0x0) syz_io_uring_submit(r1, r2, &(0x7f0000000180)=@IORING_OP_TIMEOUT={0xb, 0x1, 0x0, 0x0, 0x4, &(0x7f0000000140)={0x77359400}}, 0x1) syz_io_uring_setup(0x4bf1, &(0x7f0000000540)={0x0, 0x0, 0x36, 0x0, 0x0, 0x0, r0}, &(0x7f0000ffd000/0x2000)=nil, &(0x7f0000ffc000/0x1000)=nil, 0x0, 0x0)