From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (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 9191C15DBA3 for ; Thu, 26 Sep 2024 17:14:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727370875; cv=none; b=giw1NOAZ2JdQ6JH7pA36fGaeJGjDJiGgED/AKIIWJXMsopFBZK7p5WqipEUj9MwxlwOj8gFxt9n+J+mB4N3VeIheZqFnijv+0eX5wsy+tzrq1+HtMNL6GY8uKS8lL3yxnS6g9Kx2Omwxc+GlF2dmCNT3sg90GkwjI2lZPhT59+o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727370875; c=relaxed/simple; bh=mSAZQAfzb5f99wL7DAF3fixliJJmvYEDnISlGfHXxEY=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=PUsHF/cEdhxS/g7+DsGUWxNe8M7HZuXF4zLYrhi90cK/h2FQApRWUZVliHnBpnzLObfh9ZdgHHuvoj1XbdSWl5TS4QZkDqJpSbO3jK4EX+uHKwpT0/fj6ZdhfNxOiSNP6UpwHFS/kggvr8Q+wQ42zCkcY5EUHR65xV+V1hcajM0= 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=209.85.166.198 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-f198.google.com with SMTP id e9e14a558f8ab-3a0cadb1536so13341165ab.3 for ; Thu, 26 Sep 2024 10:14:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727370873; x=1727975673; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=ZcVFNg0CORml1RvTFpDvQ6uyvL/nbMGVmyvBgYWAPi8=; b=PVbA5/6OzGPCs40gWY8607Dx6kLwLJNqTEHBa67KcLQGzv/hu7Vsg5ayAlLdZKV6d9 GhyeRqdd9OnnKw9dXWTQHJ2aAc7hISC1f4zqd0Mfa2avtdEwQTADqndOkzUb7hjP89LK xzYXIUfzBhnoGyj30EBJoYipr7ndG8bWdd5JU8NwzoF2niIeXEfTtT2OnxzxfR+flbkg f3npMIpT7YQ/zDfykK98+vwkgDnxbG3zFVD+KH5X2MqYGztp5reeABkRisAREhAFMuO3 w/vRlBST9e7WY3lee3P52Hir2QLCXhPJHNFKOWTn+El9A8tXrK8/uby8awJFKxSKHonk 6/TA== X-Forwarded-Encrypted: i=1; AJvYcCUu41TY7HiV3yioKplyVIFWWHvkiiPf9Z/ifUDJGxduY98ys/dODG/MVCtwdCL6n8eYvoZA/Zu0q3hjBp8=@vger.kernel.org X-Gm-Message-State: AOJu0YxYAYkqQXrcUEygXgVpfqxWOXAjCt23G4emkOw4EX7yJK1dLDdw rCewK+KnKVwzmTVAo3Qff13gEpu1FjeI7a0Sox4a0wQwtprd85RHzngBqX1v8CHrdS18Fo2nEAs VopMSqpZIWZAJ2ASvLsJ5rak7VjUJLTiHgE2qmXnI64YAVZ3xp/5c7EE= X-Google-Smtp-Source: AGHT+IEIU0vE8fPtWYwzuRjNCPNXJZMyaL3qlUbRAx/JOlZQ2iN6bzetYwMXi1SLRvDMQIvb/D29Ah9DBzGMkZwmbdNRVBOpQCYZ Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1705:b0:39f:5efe:ae73 with SMTP id e9e14a558f8ab-3a34514af38mr1675085ab.5.1727370872780; Thu, 26 Sep 2024 10:14:32 -0700 (PDT) Date: Thu, 26 Sep 2024 10:14:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66f59678.050a0220.46d20.0001.GAE@google.com> Subject: [syzbot] [serial?] INFO: task hung in vcs_open (8) From: syzbot To: gregkh@linuxfoundation.org, jirislaby@kernel.org, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 88264981f208 Merge tag 'sched_ext-for-6.12' of git://git.k.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=1187c19f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=74ffdb3b3fad1a43 dashboard link: https://syzkaller.appspot.com/bug?extid=8a192e8d090fa9a31135 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16aa3ca9980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1587c19f980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/87eaf0ad6d60/disk-88264981.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/30c01cf8bc82/vmlinux-88264981.xz kernel image: https://storage.googleapis.com/syzbot-assets/a1407424ea54/bzImage-88264981.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/a8a56914d1d8/mount_6.gz Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16154c80580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=15154c80580000 console output: https://syzkaller.appspot.com/x/log.txt?x=11154c80580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8a192e8d090fa9a31135@syzkaller.appspotmail.com INFO: task syz-executor199:5270 blocked for more than 147 seconds. Not tainted 6.11.0-syzkaller-08481-g88264981f208 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor199 state:D stack:27360 pid:5270 tgid:5255 ppid:5233 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5315 [inline] __schedule+0x1843/0x4ae0 kernel/sched/core.c:6674 __schedule_loop kernel/sched/core.c:6751 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6766 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2591 ___down_common kernel/locking/semaphore.c:225 [inline] __down_common+0x346/0x7f0 kernel/locking/semaphore.c:246 down+0x84/0xc0 kernel/locking/semaphore.c:63 console_lock+0x145/0x1b0 kernel/printk/printk.c:2808 vcs_open+0x5d/0xd0 drivers/tty/vt/vc_screen.c:763 chrdev_open+0x521/0x600 fs/char_dev.c:414 do_dentry_open+0x978/0x1460 fs/open.c:958 vfs_open+0x3e/0x330 fs/open.c:1088 do_open fs/namei.c:3774 [inline] path_openat+0x2c84/0x3590 fs/namei.c:3933 do_filp_open+0x235/0x490 fs/namei.c:3960 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup