From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f79.google.com (mail-oo1-f79.google.com [209.85.161.79]) (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 B54A22AF1D for ; Tue, 11 Aug 2026 00:13:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786407212; cv=none; b=KW7lUwnAkp5nUbWh9lAzuiejbRqNzYE/SwD9rAnx0MGtl8TAftakQC2lfw5iDXWZ9f1LEGny+e+pC+IqcRUxCreJpK3A3DiD1IY9dvUlaYH8le/wEGEbyeug9p7ONfPx0+0Rna2mM+db56WFhiDSrqm4mjZiz4Rb0PKpL0BOl6E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786407212; c=relaxed/simple; bh=0rXzeyqFR8Nv105Ja6FW9DfdKa0/G/+NhWDDriHtmsw=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=LGiq56qFFNQRwrfbpCHyqm4tu/ncdPJvn07XuRoRZ/64uuz0YOwpWn7DYJCdwvZoinmkzUKLVLS+jxuiruhZeLWEwKpmPFh/ccLH5+NdOdiyUcccqibDy8RIcicKmKLHiB7iKi4QSOE++t4zLQ8ETTgmEy9W/paoJB8HK1zUaBU= 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=209.85.161.79 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-oo1-f79.google.com with SMTP id 006d021491bc7-6acac05f082so727333eaf.3 for ; Mon, 10 Aug 2026 17:13:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786407209; x=1787012009; h=content-type:to:from:subject:message-id:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=wKqHDM6kFIbgjm3bxpK4dktxANqlyo+NQnIku9ZyIwY=; b=XeMH8azzFHK9GGlW6kbZ2nJgc+EKJ5URmluoDJMAAGaxH4S6ksqLXAXLPQJmIjSidH gterXIeOZ++GrU0qqn1eeb4jXkfouG2TiV+5rejJYYZgMZZsF0t+9a76tel4cQ/ngyH4 XVITh1CArMh7nO/ltAYVUkMv++jyPJYIJC6Kf3fFia8FAYuWUxM0GewqKS+zgy0pvB35 g2HcS1JwmjLqLNT43JFjb5NspYgStYNX900rWmmBM7Xs79QdV//QVGBEpCGClTAvbDEp q3OB07cRZ+kdPG9Xzzw3NAEpEd9sUmyyiJ9n64UgXLePabkZe2IMOJz4j9C5G85oaW8T L5GQ== X-Forwarded-Encrypted: i=1; AHgh+Rq2rx+N/eTiWTBjr5XyLfkOtjMrB6T+9qSz64L6jCg8c+gas+2WlD4T7OFohQ9AVJNfKHcN1akjw3TeH9c=@vger.kernel.org X-Gm-Message-State: AOJu0YxTciIs6UXC9vH9wl6c9Upl/NK3m4jEqV4/AzD5EHQD9nIGGI7c MuDd92yVit3qR937FtUOtWZZcOOINAZq8VRd63rf9vI4N90q6is3gClvsTnKnOcdTcbm0mMOMRc HKNzg/jjFusdSmKhYo1y73sfl0Ww9BWiQgNJZ/nWU1QMT+/g4UbsRuLZvErw= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:e908:0:b0:6a3:d77e:725a with SMTP id 006d021491bc7-6b04213b952mr12333927eaf.20.1786407209671; Mon, 10 Aug 2026 17:13:29 -0700 (PDT) Date: Mon, 10 Aug 2026 17:13:29 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7a6929.b50370da.49fe0.005e.GAE@google.com> Subject: [syzbot] [mm?] WARNING in set_mm_walk From: syzbot To: akpm@linux-foundation.org, axelrasmussen@google.com, baohua@kernel.org, david@kernel.org, hannes@cmpxchg.org, kasong@tencent.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, mhocko@kernel.org, qi.zheng@linux.dev, shakeel.butt@linux.dev, syzkaller-bugs@googlegroups.com, weixugc@google.com, yuanchu@google.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 562bfb501c54 Merge tag 'integrity-v7.2-rc7' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a8cbb9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=12ee2725d5fde63a9c96 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-562bfb50.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9cbf6ef0490e/vmlinux-562bfb50.xz kernel image: https://storage.googleapis.com/syzbot-assets/7ee52864c79a/bzImage-562bfb50.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+12ee2725d5fde63a9c96@syzkaller.appspotmail.com ------------[ cut here ]------------ current_is_kswapd() WARNING: mm/vmscan.c:3800 at set_mm_walk+0x210/0x270 mm/vmscan.c:3800, CPU#1: kswapd0/110 Modules linked in: CPU: 1 UID: 0 PID: 110 Comm: kswapd0 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:set_mm_walk+0x210/0x270 mm/vmscan.c:3800 Code: 13 00 00 4d 8d 7d 08 e9 f7 fe ff ff e8 79 f5 2a 00 e9 b7 fe ff ff e8 7f 6b ba ff 90 0f 0b 90 e9 d2 fe ff ff e8 71 6b ba ff 90 <0f> 0b 90 e9 74 ff ff ff 4c 89 ff e8 80 f5 2a 00 e9 4e fe ff ff 48 RSP: 0018:ffffc900027772b8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888024934a80 RCX: ffffffff824ff8e8 RDX: ffff888024934a80 RSI: ffffffff824ff96f RDI: ffff888024934a80 RBP: 0000000000020000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000020000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffc90002777c38 R14: 0000000000000001 R15: ffffc90002777c40 FS: 0000000000000000(0000) GS:ffff8880d5ed8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31923ffc CR3: 0000000109695000 CR4: 0000000000352ef0 DR0: 0000000000000005 DR1: 0000000000000005 DR2: 0000000020040004 DR3: 0000000000000056 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: try_to_inc_max_seq+0xf0/0x1090 mm/vmscan.c:4023 try_to_shrink_lruvec+0x4bd/0x6b0 mm/vmscan.c:4977 lru_gen_shrink_lruvec mm/vmscan.c:5128 [inline] shrink_lruvec+0x31e/0x25b0 mm/vmscan.c:5888 mem_cgroup_shrink_node+0x227/0x6a0 mm/vmscan.c:6753 mem_cgroup_soft_reclaim mm/memcontrol-v1.c:312 [inline] memcg1_soft_limit_reclaim+0x2d5/0x830 mm/memcontrol-v1.c:362 balance_pgdat+0xa11/0x1f00 mm/vmscan.c:7177 kswapd+0x556/0xb50 mm/vmscan.c:7462 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 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