From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f207.google.com (mail-il1-f207.google.com [209.85.166.207]) (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 130581B87C0 for ; Fri, 29 Aug 2025 21:46:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756503998; cv=none; b=Xe2XfGhqYUaHEjBqZebjhtopgoXyIaBtky1W8r4ywUj2NBgixxEhEiA9AVGVWqS1pzG4PSA/2AbTdwKHwQErTQbgc0YYm7EsudpboxhoS7s9qWX1mXTb1IATOZuD9bmxKYgfzwJOl9eTdOi/BqhckoO/IoOk7ilHh87N/CAXaAo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756503998; c=relaxed/simple; bh=hKWDvRqmQr3ZQflFF1omTQ1oekC7H1hjYm0m35k8ex8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=iMNJrD17FLBzPi4UDuKbqDtmcStqNPZ/MlIJpKHAmpHE/gU5vDQn+0pF4AgQzNO3OQQzM4p+ZpbnPrBGJXcyfqFN/2GbcLN79OJp+r/iDDjVhfnJ848DTRsTl/hHqlbUCPaHZRUNTvgSXkztzX16TyyAPrJdqbthpPU2OvChCzM= 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=209.85.166.207 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-f207.google.com with SMTP id e9e14a558f8ab-3f1ebcf0863so27103515ab.2 for ; Fri, 29 Aug 2025 14:46:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756503996; x=1757108796; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=uQ7K9ruquIqemeNU1LnUs5tXuMs3y+0vYUtTi6EIPrM=; b=N6uMnUyRGeidErK9fiMoLhzPbefXjSp8Jei74cTLKbVVaOl7M46QwbP6FRJYw6EFXN EqSiXAk+tElELF52wXywgywm5iS1kJ2bxOk73QY/VwWdCSo+8R0OXugPzVDTDLj4elA1 4Gwhkee+DQOwCn9lIvpZEdi5p4lGBu2FN5j97FjxxCY4BEqgPPvbvNKLPL1elrwGj+LY ku/FDfN6+g9bl0Rt2OAA0aZLRNvpmMnig278oPqttHClat6o9lsQADAtgNMXeiTiosdr zuN2oA/reAwLHC1DEASZ75gNTT3qhVZLmIwqqQmEPOpcUlRybLWVSAt1+Uju4efaM25H R5lw== X-Forwarded-Encrypted: i=1; AJvYcCUWbE6UX1IP9UdxBynScm0BWCik2q/dqbEAYYE7E+JSAdTZ+ldAnXWnFfSbmadsimXGQDAai2WYNCZa/N8=@vger.kernel.org X-Gm-Message-State: AOJu0Yxz4CY36U0sEK1KBae8fe1Vjv7Y4z8t13vQcxL1PKc8kj6R9myi tMeC1zLzLrOEkyl3WsR52Lby8Y4pkgcK9PGq5vmCBF2KtpFFFMKOeUHeqIjsWdVkHuAYvygyFQR LYeeAr/gXjPdw72M9vMlHYGFB/Uu0AyjilosIZrdD9nj7r1dnTd9KKv9UqPo= X-Google-Smtp-Source: AGHT+IHK4VqJQn9TVZ+z7ck1sVNEKNeueQCg+P477ryERP25b6Kd6zjZuzVaqbGTlBHplAk2f94ESIynjjo3aJnHtC72FpBtrc7u Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:198e:b0:3f0:a48b:151b with SMTP id e9e14a558f8ab-3f4026c300bmr2368905ab.31.1756503996107; Fri, 29 Aug 2025 14:46:36 -0700 (PDT) Date: Fri, 29 Aug 2025 14:46:36 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68b21fbc.a70a0220.f8cc2.00fd.GAE@google.com> Subject: [syzbot] [kernel?] INFO: task hung in worker_attach_to_pool (3) From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 1b237f190eb3 Linux 6.17-rc3 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10a96ef0580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d4703ac89d9e185a dashboard link: https://syzkaller.appspot.com/bug?extid=a50479d6d26ffd27e13b compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12397862580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10b11c42580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9d469fb7e3a4/disk-1b237f19.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4114df4f6a8b/vmlinux-1b237f19.xz kernel image: https://storage.googleapis.com/syzbot-assets/fa16b8bb6a18/bzImage-1b237f19.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a50479d6d26ffd27e13b@syzkaller.appspotmail.com INFO: task kworker/1:0:24 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:0 state:D stack:26792 pid:24 tgid:24 ppid:2 task_flags:0x4208060 flags:0x00004000 Workqueue: 0x0 (mld) Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7058 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115 __mutex_lock_common kernel/locking/mutex.c:676 [inline] __mutex_lock+0x81b/0x1060 kernel/locking/mutex.c:760 worker_attach_to_pool+0x27/0x420 kernel/workqueue.c:2676 create_worker+0x2a9/0x7e0 kernel/workqueue.c:2818 maybe_create_worker kernel/workqueue.c:3061 [inline] manage_workers kernel/workqueue.c:3113 [inline] worker_thread+0x9dd/0xf10 kernel/workqueue.c:3375 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task kworker/0:7:6151 blocked for more than 145 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:7 state:D stack:31320 pid:6151 tgid:6151 ppid:2 task_flags:0x4208040 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xe7/0x3a0 kernel/sched/core.c:7058 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115 kthread+0x236/0x780 kernel/kthread.c:451 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task kworker/1:7:6152 blocked for more than 145 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:7 state:D stack:31320 pid:6152 tgid:6152 ppid:2 task_flags:0x4208040 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1190/0x5de0 kernel/sched/core.c:6961 --- 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. 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