From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f208.google.com (mail-il1-f208.google.com [209.85.166.208]) (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 3D7C734545 for ; Tue, 3 Jun 2025 16:15:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.208 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748967337; cv=none; b=k6KSQZRe30KvGPjUs5R9+5eODB80ZLvxL1bF6+Kl42Nb3vH+YNeOcQGeo5ea4ABukhK06TO1FKmJLDzNQBqaoScTNLYCP6BN1SlNlMpLTeaThRe6wpQn5Ix3uXkm8UZIcogor14n7F6OZRVOOdfYee3x53psdkZ3bXbZTCuW5hs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748967337; c=relaxed/simple; bh=w+cYj+bZFDm9P7nXNSWeYs9M2oMy2QoF+kzDd6xE5Ak=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=M2wiTo3MQoW8Twj9waRP/g6X5xiSXjUUUXcGYAHPTfxTOnzK4y5O/7HjiyvkMh3LbqPbKSpN2AVim9fwh2rNQpx2XZHhWxuqdwE9WBl+vwjTBGUN4KWx2stTxQNRhsz3tnn8T2YeRcj9FrdufbUpKbn+14oHXFHHhBE5tbIQt70= 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=209.85.166.208 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-f208.google.com with SMTP id e9e14a558f8ab-3dcd10297d5so89337355ab.2 for ; Tue, 03 Jun 2025 09:15:36 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748967335; x=1749572135; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=76X/DdAmGEp03OYcwF3qW6PE+GuefCWrC1PptIUvkEw=; b=wxFhwsLNl+KAcNE7xFIB/uwHhRAV6dW1mWAEHi3P63wqd142shK47nc/NjBmce0pRx lVd1InvYqR9Led99JxfKiXUCR51auyCImMuLiSWch3feoq00GY6eSK/6OBeZTm29h2OB F4MMCjtfPDLeNmZ0seZZobG1mBRDHZD2HAV04ZO+7NHe1kvHCA3yiEbrfkRINXN3Dovf jr+uvq0Oa+xpbVE6COlmbfeW4XRgdEcgfe9rPJ1DHH2KE3W+UmFXzupvgupS31/Oi8OR aBh3G2UsZ1vvmd4bPo+jbi4dn6jW+YgNKgeNIcYEskqZtN7rSQs6o8WxaGg18QwY5oh3 JBSQ== X-Forwarded-Encrypted: i=1; AJvYcCWRFw2QjaFhWrRy6LKtyX3A7y5ByZq/npV512k3Eum5JQUOqEY0SPGtYyEmKMCvQqhr3GVNkBJgZI4hHgc=@vger.kernel.org X-Gm-Message-State: AOJu0YyHYWPpALY3H/aVtbd5cBwG4MpiYiEkpCLr/P+u7uN5r3T7dkBg RXfoOthQ+0XX7Z0S/jWTZgxlLGMOAQZ/pZQ5K4bzJdLiB8H+keX2X8dEUNTHNAYrkaRd/ehrEPK MnmMaLTm4iTcHXkKgSuJ8hOoxEfUOeRllIr8oIdtOD+quu1gEEtw+Pn1OMUA= X-Google-Smtp-Source: AGHT+IEeYHEFfYjc0zLBj+UxmFFz22As+TynOI7W6GEuDGXDb6Sc/mswRPV1NBw/uU0lh9iw0rkUIRYH0QQamN+sfReImq6YsOW3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3c8a:b0:3dd:b762:ed1d with SMTP id e9e14a558f8ab-3ddb762f05bmr34986295ab.14.1748967335335; Tue, 03 Jun 2025 09:15:35 -0700 (PDT) Date: Tue, 03 Jun 2025 09:15:35 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <683f1fa7.a00a0220.d8eae.0071.GAE@google.com> Subject: [syzbot] [cgroups?] WARNING in css_rstat_flush From: syzbot To: cgroups@vger.kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, mkoutny@suse.com, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 90b83efa6701 Merge tag 'bpf-next-6.16' of git://git.kernel.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=1034f482580000 kernel config: https://syzkaller.appspot.com/x/.config?x=262b2977ef00756b dashboard link: https://syzkaller.appspot.com/bug?extid=7a605e85e5b5a7e4a5e3 compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d5357fcb09e6/disk-90b83efa.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/dcb0f12e4d5a/vmlinux-90b83efa.xz kernel image: https://storage.googleapis.com/syzbot-assets/278fcadd7519/bzImage-90b83efa.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7a605e85e5b5a7e4a5e3@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 0 PID: 10 at kernel/cgroup/rstat.c:302 css_rstat_updated_list kernel/cgroup/rstat.c:302 [inline] WARNING: CPU: 0 PID: 10 at kernel/cgroup/rstat.c:302 css_rstat_flush+0x76f/0x1fa0 kernel/cgroup/rstat.c:413 Modules linked in: CPU: 0 UID: 0 PID: 10 Comm: kworker/0:1 Not tainted 6.15.0-syzkaller-g90b83efa6701 #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_updated_list kernel/cgroup/rstat.c:302 [inline] RIP: 0010:css_rstat_flush+0x76f/0x1fa0 kernel/cgroup/rstat.c:413 Code: df 80 3c 08 00 74 08 4c 89 e7 e8 4c 3a 6a 00 49 8b 1c 24 48 3b 5c 24 38 74 22 e8 9c 1c 07 00 e9 72 ff ff ff e8 92 1c 07 00 90 <0f> 0b 90 eb bd e8 87 1c 07 00 45 31 e4 e9 bb 03 00 00 e8 7a 1c 07 RSP: 0018:ffffc900000f7780 EFLAGS: 00010093 RAX: ffffffff81b8de5e RBX: ffffffff99c36880 RCX: ffff88801d2b1e00 RDX: 0000000000000000 RSI: ffffffff8be263a0 RDI: ffffffff8be26360 RBP: ffffc900000f79b8 R08: ffffffff8fa0b1b7 R09: 1ffffffff1f41636 R10: dffffc0000000000 R11: fffffbfff1f41637 R12: ffff8880b8642758 R13: ffffffff99c36880 R14: ffffffff8db91c60 R15: ffff888125c66008 FS: 0000000000000000(0000) GS:ffff888125c66000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f350fc65760 CR3: 0000000032e5c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: css_rstat_exit+0xa9/0x320 kernel/cgroup/rstat.c:479 css_free_rwork_fn+0x8b/0xc50 kernel/cgroup/cgroup.c:5449 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 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