From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f78.google.com (mail-ot1-f78.google.com [209.85.210.78]) (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 7893027380A for ; Tue, 9 Dec 2025 12:16:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.78 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765282592; cv=none; b=RA5EOTbKycA+91pYmuy3GT/PNS595te0G6g0PVPo1/RoklSTn7eBYGrttT007ATo4pHEdt723yjUmb9sygFBpKuSpN6V2M9TGGW3EOZR33YDyc0WkQi0ffgvBC1pKTi0rRuTIMQGH+Gy748FaZ1bhpYleS63BANJ2n7aIRNh6pA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765282592; c=relaxed/simple; bh=Iza3zjDFeEMb1sts8uF+dw8UIeMW0QffaL2g9z2q/Ts=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=KMSbOSnT4LV7B4lZ3O9fHyf8ahuSHyb6yL/usgBNzygadQlXs/Skqx5zs0Yv04jXjtgZiTSDTd+h5Yx+q3WuHEqeUkhqbpCQH1GQaNGeInaxvneHz8WMK+hOgLg0ayopJeFw26auPF8Sdynat1cbW4ufWbd4VfRpIoUvON7yI2U= 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=209.85.210.78 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-ot1-f78.google.com with SMTP id 46e09a7af769-7c7032a5b40so5400198a34.1 for ; Tue, 09 Dec 2025 04:16:28 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765282587; x=1765887387; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=N/uM2X39VK9KGgzHBxwgtTqja8IFkuw/J5CQxJyGUM4=; b=gcA7f5+3riGo27/iNs6ugtmYUDx8IevztncWE0/o0yhPvjp+ty8VhnpI6cqUbX0co1 SgW0eeccIeWvlPMdzl3cR6tjH9SN58gIkjUKY4cT6wy1EGxeSTqn1ZmR8po0qsBNp0eg 9YQ/CFpyj/chMYMiqwUgdcrfRUYEuNyoaiETtnHqFRLgJcoQ7wiIyykgXsdR9QNz2gVN 88ranaU/pl9ZsyX5dwSkWQksesB/rQQJFzgA1gZQfb4BIEBjIJY1YIvpTdrsCPvh401I aoHqNL7Y+fZ1746XVad/fkEm0Hsg3Rk+9oMqeXYn8A7nRkv2zh1mg+9irPr9m91sVSgm tBBA== X-Forwarded-Encrypted: i=1; AJvYcCU82l5GnRoykgW62HBbdMCcP8/6iFd//vbO6YCKixJ/5Z7E8iaJxN8bLqXmHVBnvfpwS9hVIzVI3a5Q4Mo=@vger.kernel.org X-Gm-Message-State: AOJu0YzXOKbV6uWbIc6gPUF1pyWjbOXq2frYsaq+see5PEUArlnRK8y/ g9glxB1oimaQvB/jIK2dSG1T6vGhkBL8K2VGj9w0yVtOoBuOHUMrxmxUNmExb7K8GCUCxj2CXlp CSMF1PsPheUK27UBCTxw0PbEvOJ4lZlaZACkjSHKRg/eNvyfNIRYMmxldliI= X-Google-Smtp-Source: AGHT+IHDa9f5juZBS+Zx6u44j1CWhoT2+BzGGjqYDErBrr8VbE8OglzIH0QZqyauT5Q9M9GGrLyFTZD/tJvIe2YRmp/HhStVLnCL Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:607:b0:659:9a49:8dd9 with SMTP id 006d021491bc7-6599a8e96fbmr3928732eaf.27.1765282587547; Tue, 09 Dec 2025 04:16:27 -0800 (PST) Date: Tue, 09 Dec 2025 04:16:27 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6938131b.050a0220.4004e.0007.GAE@google.com> Subject: [syzbot] [mm?] WARNING in shrink_lruvec From: syzbot To: akpm@linux-foundation.org, axelrasmussen@google.com, david@kernel.org, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, mhocko@kernel.org, shakeel.butt@linux.dev, syzkaller-bugs@googlegroups.com, weixugc@google.com, yuanchu@google.com, zhengqi.arch@bytedance.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 2061f18ad76e Merge tag 'caps-pr-20251204' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=151cc41a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=879619bdbc37e7fc dashboard link: https://syzkaller.appspot.com/bug?extid=90fcab4d88cffed6d0d8 compiler: gcc (Debian 12.2.0-14+deb12u1) 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/5fcfff6f18cf/disk-2061f18a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/36b7247e87d2/vmlinux-2061f18a.xz kernel image: https://storage.googleapis.com/syzbot-assets/e2f1eee5ec54/bzImage-2061f18a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+90fcab4d88cffed6d0d8@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: mm/vmscan.c:5049 at lru_gen_shrink_lruvec mm/vmscan.c:5049 [inline], CPU#1: syz.0.6406/391 WARNING: mm/vmscan.c:5049 at shrink_lruvec+0x253b/0x2b50 mm/vmscan.c:5818, CPU#1: syz.0.6406/391 Modules linked in: CPU: 1 UID: 0 PID: 391 Comm: syz.0.6406 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:lru_gen_shrink_lruvec mm/vmscan.c:5049 [inline] RIP: 0010:shrink_lruvec+0x253b/0x2b50 mm/vmscan.c:5818 Code: 89 de e8 78 78 bf ff 49 8d 46 34 48 89 44 24 38 84 db 0f 84 cf 00 00 00 31 ff b9 02 00 00 00 e9 42 df ff ff e8 06 7e bf ff 90 <0f> 0b 90 e9 45 dd ff ff 48 8b bc 24 98 00 00 00 e8 e0 90 27 00 e9 RSP: 0018:ffffc9000d5def60 EFLAGS: 00010283 RAX: 0000000000001170 RBX: ffffc9000d5df120 RCX: ffffc90014135000 RDX: 0000000000080000 RSI: ffffffff81fe1a6a RDI: 0000000000000001 RBP: ffffc9000d5df2e0 R08: 0000000000000001 R09: 0000000000000030 R10: 0000000000000020 R11: 00000000622d1f49 R12: 0000000000000020 R13: ffff88807cd00d40 R14: ffffc9000d5df628 R15: 1ffff92001abbe0a FS: 00007f36a7b6f6c0(0000) GS:ffff888124a67000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30008ff8 CR3: 000000005c3e2000 CR4: 00000000003526f0 Call Trace: shrink_node_memcgs mm/vmscan.c:6054 [inline] shrink_node+0x988/0x3da0 mm/vmscan.c:6095 shrink_zones mm/vmscan.c:6339 [inline] do_try_to_free_pages+0x362/0x1920 mm/vmscan.c:6401 try_to_free_mem_cgroup_pages+0x31b/0x740 mm/vmscan.c:6729 mem_cgroup_resize_max+0x113/0x2b0 mm/memcontrol-v1.c:1480 mem_cgroup_write+0x295/0x3a0 mm/memcontrol-v1.c:1662 cgroup_file_write+0x1ef/0x7a0 kernel/cgroup/cgroup.c:4312 kernfs_fop_write_iter+0x3af/0x570 fs/kernfs/file.c:352 iter_file_splice_write+0xa24/0x12b0 fs/splice.c:738 do_splice_from fs/splice.c:938 [inline] direct_splice_actor+0x192/0x6c0 fs/splice.c:1161 splice_direct_to_actor+0x345/0xa30 fs/splice.c:1105 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x174/0x240 fs/splice.c:1230 do_sendfile+0xb06/0xe50 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64 fs/read_write.c:1417 [inline] __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1417 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f36a6d8f7c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f36a7b6f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f36a6fe5fa0 RCX: 00007f36a6d8f7c9 RDX: 0000000000000000 RSI: 000000000000000b RDI: 000000000000000b RBP: 00007f36a6e13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f36a6fe6038 R14: 00007f36a6fe5fa0 R15: 00007ffd83c52c98 --- 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