From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 6E3AE156662 for ; Wed, 3 Apr 2024 23:51:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712188264; cv=none; b=dLcdwQhj5pW4eor/oQIqLWe/dsd2F85gjHgrfPr6C/pV/pJECHwe+rAmXcbKWKuJm1owab+2NFF9ER6i3YTi7aoB0rqbhRKOFQLvFM8NeiiieyCGWEL2zNSSqGe9zDgJvwKnVFVG0FHcEfxKfM+jjCeeSD+3lzuTVA8TmciXJOo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712188264; c=relaxed/simple; bh=7ip0uxWOp6WecD8HYk9xKfo5g7Q5QDWOV6mON1A9o6Q=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=IuDVSZRhTldtJHfA6j/TaejmLTDTQXqghT9fJUrfrf0mLba8fUNpZMXAbLFgrYBHyz8NOLRlMRBNrc+mvjAOz946O0xBCT4wpLK9iQz/SfJaTxnMm8vq2cc7HGXvcDqPLEIHy6OPstCe3SG2Al0x3bNvCk3XSo0avRMcGnvFyWI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.200 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f200.google.com with SMTP id e9e14a558f8ab-369e344227bso2546085ab.3 for ; Wed, 03 Apr 2024 16:51:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1712188262; x=1712793062; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=/jC4YnFvifP/yHXxrC7XuUJyFpMsXOBNgCQBG5wdRFQ=; b=gRySsv3jLGRfgJnUbsOxigLPs/02w98QgZPp6vGMaB+eF6WOzt1MZ8mgZ+oO2t+jE+ mGSHBUOIlCS8jIZo8cJmQ8gXfDf1mbPNugydcYSeItvaOu0qP+LkKRw0mXTbqsF1XIu2 wmxjRZ91TVAHTmW/hWuH/XtRYJUMKIaHNx6Gcpzps0QId0gJysTuPSeDf4F6Pg9z9Q6i 4OjoNs5R2GnFA/K58mMHFN0typxzjHIOqV3wEm1Cm6wiR6ywtz1kIyp0Zrjjj8Jt7uI1 X3oeJpzXwc3zECn/6d4bMBJQLguybp9OxY25GBeunT31ywi+bxvVxw5iGFXA5zn2kdFp 20mA== X-Forwarded-Encrypted: i=1; AJvYcCUavfk+d0DxgFDOVwqrtBskXAoXtPE399vAWQYcg87+AlvIu69yEGBidU/ivJkxCj3I678fGErtdJswAH/EvL1be0ODiGu2p1g4eeDR X-Gm-Message-State: AOJu0YyZNLJeRQzAa2XPT8p6vrCCDx4eSSsnRRE/76a263/cVfkAZ8Wd DQ4ZDbvSsix7166AL0o4m25lWOxpy2FOHbWO64jt4tCKTCmxqzmsLB7+PhcteJGUGz248AcAYIl aRs/GJ4ZXEgkpSOYRYkpLWoAqDkp/lCeObYhzOzY12uQWBsb2V5GLniM= X-Google-Smtp-Source: AGHT+IEPilzz/Msv9bs1Mliga9g/dWfYMw9Di7/yPVPKV6N4GrfprHzjRBALpFuinDYc9680MMfz8pX7uCCb8L6K+oyeroVyXbJJ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:178c:b0:369:f9c6:359d with SMTP id y12-20020a056e02178c00b00369f9c6359dmr83958ilu.2.1712188262648; Wed, 03 Apr 2024 16:51:02 -0700 (PDT) Date: Wed, 03 Apr 2024 16:51:02 -0700 In-Reply-To: <00000000000098f75506153551a1@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000002f2066061539e54b@google.com> Subject: Re: [syzbot] [kernfs?] possible deadlock in kernfs_fop_llseek From: syzbot To: gregkh@linuxfoundation.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org, valesini@yandex-team.ru Content-Type: text/plain; charset="UTF-8" syzbot has bisected this issue to: commit 0fedefd4c4e33dd24f726b13b5d7c143e2b483be Author: Valentine Sinitsyn Date: Mon Sep 25 08:40:12 2023 +0000 kernfs: sysfs: support custom llseek method for sysfs entries bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17cb5e03180000 start commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel.. git tree: upstream final oops: https://syzkaller.appspot.com/x/report.txt?x=142b5e03180000 console output: https://syzkaller.appspot.com/x/log.txt?x=102b5e03180000 kernel config: https://syzkaller.appspot.com/x/.config?x=4d90a36f0cab495a dashboard link: https://syzkaller.appspot.com/bug?extid=9a5b0ced8b1bfb238b56 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f1d93d180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c38139180000 Reported-by: syzbot+9a5b0ced8b1bfb238b56@syzkaller.appspotmail.com Fixes: 0fedefd4c4e3 ("kernfs: sysfs: support custom llseek method for sysfs entries") For information about bisection process see: https://goo.gl/tpsmEJ#bisection