From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f42.google.com (mail-oo1-f42.google.com [209.85.161.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 93C5325392A for ; Fri, 5 Dec 2025 04:05:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.42 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764907521; cv=none; b=cEvJimR/k8Sjqu/hn9nB/sj+hAHCD/DKm9NjZZR1ItANIHw3f+oDNuOz81geUNSZ3Gtvkpw154T/X6A3NPVES32+qY0mba8Op4oD2ST3+XZXmk5P19rQCdd3unlWfmLHO68d4pJLke60+S3Tqch8Jca+7TUFN61/B9sYR7cXxIk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764907521; c=relaxed/simple; bh=GyIAzkZAg3GkX5CTyJK9ydPuCSSUC+26lX7bugcM1Z4=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=ZZWBtsvlaPTnYenMGccGKracRvevqKYa5scxuJXHKfNgAsPjsFzIhMgF67Dom+Ny7Ny0rBVQo2mkaEfVHP4lXn7HZZtXQiXDvzimDWBnLvCordfhRa9y7/4UlAjuh8sz29v91SPfs263EdPowByt7jKInc202vDOzUZ+2T+DEy4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk; spf=pass smtp.mailfrom=kernel.dk; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b=zn5wxoef; arc=none smtp.client-ip=209.85.161.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.dk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b="zn5wxoef" Received: by mail-oo1-f42.google.com with SMTP id 006d021491bc7-65727896f35so1145712eaf.2 for ; Thu, 04 Dec 2025 20:05:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1764907518; x=1765512318; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:to:subject:user-agent:mime-version:date:message-id:from :to:cc:subject:date:message-id:reply-to; bh=JQ03qJzwSGNPzbadSoBvMIxT2cnpqtrGFQzqppycE5A=; b=zn5wxoefKrUWje/lhPhLheZCKaM+lSCMYPPkLsONA+cKVu0OKArVaeR2qiFj+9jJy7 jxQ3NJIzJS3E8ZzpfzKO2Iw6AeU7Sls1WuzQudZnLt+jnhxOfARTz7xXeyOz1bUdulAf 4g/U7wtCUVVNgSnbiYZbEKncRSB/P3B3ju/ZONk3T2np5ml/lDSwQzjGMWZsG060LuR4 b6Iq+S0TL37UiLcogSEPdQg7JECHKKBviBo7gYS7yjL/gshzYDGyPFLfnhB2uGtU3ZsQ xxpckgjpWQLGjEZMDCHILfA20N/BwKd1A5qwTbpGPS7EWVcuUTty32qaXbW2K7F6auKT QH4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764907518; x=1765512318; h=content-transfer-encoding:in-reply-to:from:content-language :references:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=JQ03qJzwSGNPzbadSoBvMIxT2cnpqtrGFQzqppycE5A=; b=WLPrskomhcqDxUb6V/qidKP3LTqY+ZrHI0EngAPYlATQEjt6Bq+ZgufB5SFTmmbLwk L08To1HxwDqQs/TNjaB1tZIGvt+rDUB1W2KIAGxr73Z79mx/JtzyrsIHPCQduMFjCYIX BNjAA7LU7Q0OkS1I8NHIAGnQ0cNqA+jG5bB+rKQP7MFv4jXV8GY9IbQ7gbJ+32b9HRdp QR2up6jgxF8WwFSoYiqCf82Rwl4wV7VGIbSwUwGv9MnzKkjMkJuGnlIGYeDqmMYXCHW+ vWzkLEVGUMExhSUEtxhgMWQ8/yPy2WlwI3Jr3oYurFwzp1+G3jAwXuUv4W6u4z91Abr5 97lA== X-Forwarded-Encrypted: i=1; AJvYcCXUrhofU/iB0wFkCk8ygHjzHE/RU0nQjaGgodj/Le83RTnTuLEN7vxlPDIm204Apkcu47P5u7gWM9faKA8=@vger.kernel.org X-Gm-Message-State: AOJu0Yz4U6iOGS0UZHxTeBrk6Q2pOWzGXSDmvhrgqrs39ZxoJllyoF/b YGSgMsEO1PXTvJzp1Z19mR/lagmMV9RO4Ji/gRWoiIAcks5nSvtgPVdymnYU4hCP8Ho= X-Gm-Gg: ASbGncvZPmOxmsOcyclnGSW78khD927kxHgkZqHSoKmJH9DwsiWJSFlrGtvF2DkT0aI +JcBz+1AOBVvy2Y0HRMU9lk7h2x4kZgC3oltg4BsZbUxgb5ijDGCoZT46hPP4WQta79y+t8y8Id aKIKtISJfstn9UU0OROXdq+qRcNiMm0YNH0QGhTrOsUc/mi/dGsM+JYHlU7QJaxXn6IfW/cAcfi JQkxnu128AWLjMuXfffqQpPM8nu6MLeO0BdYYcSx0L5pp0Q6jnkIM2i/MzV5v9UYNOKDXxH1d+e nzLOj/0wcZA6TtSq62ObYM8TXU9CMYotylbRrDffEZ7sz3+c+j5o36wWQ+tr04Mwtzk/n1nVQh2 K7fwvxqAYvCEohIfIVT2MTWPkcvIumN3gxetPk6naFyFYEx9gAjzpA0bZr3ej5FKuYfSnSPA9ez +HLe64VIR3 X-Google-Smtp-Source: AGHT+IFoW4OlENKlkoahMbh8zbazPyj1qkqtwg7srDB76rJfxwtoYnGEVrudV9eOmRQV0L3vNwmpbw== X-Received: by 2002:a05:6820:2085:b0:657:4bbd:49ed with SMTP id 006d021491bc7-65972735988mr3896218eaf.3.1764907518587; Thu, 04 Dec 2025 20:05:18 -0800 (PST) Received: from [192.168.1.150] ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-6597ec61d03sm1712918eaf.8.2025.12.04.20.05.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 04 Dec 2025 20:05:17 -0800 (PST) Message-ID: <9f1d144a-56b8-481a-bfdc-409f3b7e7e3a@kernel.dk> Date: Thu, 4 Dec 2025 21:05:15 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [syzbot] Monthly io-uring report (Dec 2025) To: syzbot , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <693213bc.a70a0220.2ea503.00ea.GAE@google.com> Content-Language: en-US From: Jens Axboe In-Reply-To: <693213bc.a70a0220.2ea503.00ea.GAE@google.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 12/4/25 4:05 PM, syzbot wrote: > Hello io-uring maintainers/developers, > > This is a 31-day syzbot report for the io-uring subsystem. > All related reports/information can be found at: > https://syzkaller.appspot.com/upstream/s/io-uring > > During the period, 1 new issues were detected and 1 were fixed. > In total, 3 issues are still open and 128 have already been fixed. > > Some of the still happening issues: > > Ref Crashes Repro Title > <1> 4212 No WARNING in io_ring_exit_work (2) > https://syzkaller.appspot.com/bug?extid=557a278955ff3a4d3938 > <2> 46 Yes INFO: task hung in io_wq_put_and_exit (6) > https://syzkaller.appspot.com/bug?extid=4eb282331cab6d5b6588 FWIW, I think we'll keep hitting variants of this, as syzbot tests with tons of debugging enabled (for good reason), which slows things down a _lot_. Then it floods the ring with work, and cancelation/exit can then take a long time. Whenever I've tested these reproducers, they finish quite quick. Until you enable all the gunk and run it on a slow CPU or two. Hence not a real bug imho. -- Jens Axboe