From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 1ED0920A5E1 for ; Fri, 13 Jun 2025 16:55:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749833732; cv=none; b=PG6I+YF4KCEiTfAd1IrTKWYNGhi7UodgP9OOKpBL4f0pzsbnaDVbND+FJne6DOwE3GeQGZlBVTj4c7+DgFqOu3xlRdnxBQkGSHI4T0XCn3GxUHLLA3evrZEtvU0UGiProDTzBOPYzx4U7Jot85gNj93NyU9s/f5Z6/nIgmU7Cbg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749833732; c=relaxed/simple; bh=EyA7K/UJkv0KDItC2B+aTPhx+w2ReP8awivRPgdNn4Q=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=JUZBiCh7ZOQ4RRajjBCGBeEO8I+TOQAKzUEtcYfZrP80Z0PrZopKyBQ0xBe9bh34TaRPnHSgZyEsUfeULHp2xW4ikILi+/uyeaKQNgozQ7VyIy9QdGcVS5oVsqv3Chqywkz/xNsPkbFfvLephyjBxHch6lVGxIwpCPDmAmVLOoA= 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=209.85.166.206 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-f206.google.com with SMTP id e9e14a558f8ab-3ddcf82bb53so21087125ab.3 for ; Fri, 13 Jun 2025 09:55:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749833730; x=1750438530; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=xfFfu5lbJJMNTBMo7YWpaTR16Ke8kLxIXpcVDPuOtVo=; b=b9zCH9mlvlD4QUiAWKtluh6QrIyCrVF9BTSN0UIqLO6i3BDCOuSfpGUMwIUZK6zwCa NbZepNkTxhOVUHjopbqQQlJmf48ideXBXlv/01mWTzW5GrCYFHZ/K1r6pnjxWGGKtb5G NNMeldrtgY7MuQDG/BGRnNPUqcu0yY483Fk5adIuwjAWIicQBIt+2dsB29kkiUR/lt4r QXGDQWnj9IGB073b4NgNwWA14tMy1Cm2+g7O5s6R4XAa+hplg7uzGv50oTe1najNM1bk td3U4f7sdK55UqRLWTcaKuNrIGx8kFagzUwTtqAAjZu1HExWOj8lPb1hJcnFhdxhICGm JTKA== X-Gm-Message-State: AOJu0YwEH9h4aXyiOcZVYF1EuYoeOG0ADW3ufR1i1SDw5MChwLUAptPH 9yQO34+/qLFW9cw2FpOnI20zmqxOwwo3GL8/MueIX3y2BXy0+QAE5YP/qtb6ErfSfYGuwtfWa9O GegaaLZG300FbzW0E86hCUwZzMboEYSbirrKdJFQJjEZJazMqa5NDFEYBeq/+ig== X-Google-Smtp-Source: AGHT+IEPMNwQDBTk1kc1fwMXUQgBYdRHPXV1DL9UpCJJcu5v76uYq/XUmitmH3dNOQryCTN/hiFNDS9pCbq6wrF1xuBsFWyZfmuL Precedence: bulk X-Mailing-List: cgroups@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:ca4a:0:b0:3dd:b726:cc52 with SMTP id e9e14a558f8ab-3de07cdb48amr4834205ab.5.1749833730348; Fri, 13 Jun 2025 09:55:30 -0700 (PDT) Date: Fri, 13 Jun 2025 09:55:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <684c5802.a00a0220.279073.0016.GAE@google.com> Subject: [syzbot] [cgroups?] WARNING in css_rstat_exit From: syzbot To: cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, mkoutny@suse.com, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 27605c8c0f69 Merge tag 'net-6.16-rc2' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=103b1e0c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=89df02a4e09cb64d dashboard link: https://syzkaller.appspot.com/bug?extid=8d052e8b99e40bc625ed compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/79ab1e186123/disk-27605c8c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/d37bf85b966d/vmlinux-27605c8c.xz kernel image: https://storage.googleapis.com/syzbot-assets/eed2865abf8f/bzImage-27605c8c.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8d052e8b99e40bc625ed@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5887 at kernel/cgroup/rstat.c:497 css_rstat_exit+0x368/0x470 kernel/cgroup/rstat.c:497 Modules linked in: CPU: 0 UID: 0 PID: 5887 Comm: kworker/0:5 Not tainted 6.16.0-rc1-syzkaller-00101-g27605c8c0f69 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: cgroup_destroy css_free_rwork_fn RIP: 0010:css_rstat_exit+0x368/0x470 kernel/cgroup/rstat.c:497 Code: 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 0e 01 00 00 49 c7 85 70 05 00 00 00 00 00 00 e9 00 ff ff ff e8 c9 07 07 00 90 <0f> 0b 90 e9 3e ff ff ff e8 bb 07 07 00 90 0f 0b 90 e9 30 ff ff ff RSP: 0000:ffffc9000b6afbc0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888057c7a800 RCX: ffff888124754000 RDX: ffff8880308b8000 RSI: ffffffff81b514e7 RDI: ffffffff8df26da0 RBP: ffff888057c7a808 R08: 0000000000000005 R09: 0000000000000007 R10: 0000000000000000 R11: 0000000000000001 R12: ffff888057c7a820 R13: 0000000000000000 R14: 0000000000000003 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888124754000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31b10ff8 CR3: 0000000079092000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: css_free_rwork_fn+0x80/0x12e0 kernel/cgroup/cgroup.c:5449 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 --- 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 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