From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F0EABC433EF for ; Sat, 14 May 2022 09:20:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231149AbiENJUO (ORCPT ); Sat, 14 May 2022 05:20:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45206 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230420AbiENJUK (ORCPT ); Sat, 14 May 2022 05:20:10 -0400 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 038802BB1E for ; Sat, 14 May 2022 02:20:09 -0700 (PDT) Received: by mail-io1-f72.google.com with SMTP id t1-20020a056602140100b0065393cc1dc3so6433768iov.5 for ; Sat, 14 May 2022 02:20:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=cSNHYl5zll4AYOJuUlvp5qhbSyn60AyhXFgJHcsX4G0=; b=z+LiDlD/SsUAJPQ+N/xlW8UdnPpnlFpWs7zcaQJKdI0EDoR/f1EL/ah6ecylaj0A6k KKY/o0NwRVLgxhNPoU/XUdq0HyFcUC2bKKL+LccDxnllMUUTSvUKONQiVrq6ftAPMySS i6GdAgtLXCHdRGcwHGeEPFWdDJL7QlN4sugUyIlRQdmRsxN4CHMbxKGi4BraEqFzWIRA yx682kzus5V9Z3ZOgPXfvNjKcAz6TUHsUIMoRqVHlc6O9+kSs+kA/cu7bp0QDrngCiIl Cj8Xj6FMxoqstZiEIQRnjGCeMNkr/OMicubOt9ifudHMYG+QhZ6n3GqxMbdKKkPdZlLi /zUw== X-Gm-Message-State: AOAM531aLuqKrQ1wxuqnYndNvFzwr2MlfNqTxBJ7SuYLnPw8WOcdGdyH mrZn2tBwOYRUncm4hFmMmsAArpf7uMtvDT3Q2l5L5tbMR/hv X-Google-Smtp-Source: ABdhPJwqMq4HX31jXiNnxDsW+KaUa1VjK235DqByKJId38yclXdvfs9ga/3h5Ww8+wwCTl8yXvNwcSIv/YRU3YEn6h7Lsz+CZmND MIME-Version: 1.0 X-Received: by 2002:a92:194c:0:b0:2c8:2a07:74e7 with SMTP id e12-20020a92194c000000b002c82a0774e7mr4494081ilm.272.1652520008419; Sat, 14 May 2022 02:20:08 -0700 (PDT) Date: Sat, 14 May 2022 02:20:08 -0700 In-Reply-To: <20220514084129.1104-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000016121805def54c0a@google.com> Subject: Re: [syzbot] WARNING in mntput_no_expire (3) From: syzbot To: hdanton@sina.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: WARNING in mntput_no_expire R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffeaa23bc1f R14: 00007fbb0b9ee300 R15: 0000000000022000 cgroup: cgroup_addrm_files: failed to add max, err=-12 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4705 at fs/namespace.c:1225 mntput_no_expire+0x979/0xfe0 fs/namespace.c:1225 Modules linked in: CPU: 1 PID: 4705 Comm: syz-executor.1 Not tainted 5.18.0-rc6-syzkaller-00009-gfeb9c5e19e91-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:mntput_no_expire+0x979/0xfe0 fs/namespace.c:1225 Code: 04 00 00 48 8b 35 af a3 dd 0b b9 01 00 00 00 bf 08 00 00 00 48 c7 c2 60 fe f0 8b e8 e1 0c 72 ff e9 01 f9 ff ff e8 d7 be 9d ff <0f> 0b e9 b6 f8 ff ff e8 cb be 9d ff 0f 0b e9 aa f8 ff ff e8 bf be RSP: 0018:ffffc90005887b08 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8880687e1d80 RSI: ffffffff81db8209 RDI: 0000000000000003 RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff81db7aa8 R11: 0000000000000000 R12: 0000000000000002 R13: ffff888073407200 R14: dffffc0000000000 R15: ffffed100e680e4a FS: 00007fbb0b9ee700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe756d5ff8 CR3: 0000000075509000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mntput+0x67/0x90 fs/namespace.c:1288 __fput+0x3ba/0x9d0 fs/file_table.c:333 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 get_signal+0x1c5/0x24c0 kernel/signal.c:2641 arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:867 exit_to_user_mode_loop kernel/entry/common.c:166 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fbb0a8890e9 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbb0b9ee168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: fffffffffffffff4 RBX: 00007fbb0a99c030 RCX: 00007fbb0a8890e9 RDX: 0000000000000006 RSI: 00000000200000c0 RDI: 0000000000000004 RBP: 00007fbb0b9ee1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffeaa23bc1f R14: 00007fbb0b9ee300 R15: 0000000000022000 Tested on: commit: feb9c5e1 Merge tag 'for_linus' of git://git.kernel.org.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/ console output: https://syzkaller.appspot.com/x/log.txt?x=13f70966f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=79caa0035f59d385 dashboard link: https://syzkaller.appspot.com/bug?extid=5b1e53987f858500ec00 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 patch: https://syzkaller.appspot.com/x/patch.diff?x=1668ee31f00000