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 D5B33C433F5 for ; Sun, 15 May 2022 07:58:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235137AbiEOHwN (ORCPT ); Sun, 15 May 2022 03:52:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49168 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229688AbiEOHwL (ORCPT ); Sun, 15 May 2022 03:52:11 -0400 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 474A69FE1 for ; Sun, 15 May 2022 00:52:10 -0700 (PDT) Received: by mail-il1-f200.google.com with SMTP id i24-20020a056e021d1800b002cf0541f514so6529681ila.13 for ; Sun, 15 May 2022 00:52:10 -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=FcbQnzW6R0CWEeQuNssC83OfRjg2nLpDFZovyOqX6W4=; b=mm/CG2WPsIm4yXGJim1BmwN3mZLw+VihTFQS6Ugyc14yiqxjdIor9+aGnJDkA3Wxo1 gQbaeOCtiHhUB8AHOgK9wtdd1pwpBiJTaRfuRatlyAJR5T7vEQ7bHbbBmx9ivvTa+3iE p44BcJJC963CIC5x4Vs9OxMVnLISG8iIwwQW16e3w2TuPATVFGOi1ZGO5aUXvJg7WmRi OQIbQRK4GtMtZ+ujDR2qM4T0ES7zFnzdnJ69bbK2a9iX1hYxdMApiyXPEbHArK1upBLl 4eCUg3fWRox+JDj8dqk4ino5vlVSGe+m4ViTu7dVX6Pnnz8lT22yexztfJZglCvl4v09 UyTQ== X-Gm-Message-State: AOAM5313pKmd7oZxtB6dBFAYAYGKPyJhcODp3GICqDzPt8q/KBG2j6wy lpZWwFVHV8b2Fbc/KkO/3YNQyKItSbV9MccZJ9JSTb9JXVpV X-Google-Smtp-Source: ABdhPJzUTEG/jIV1srDEEl5z9fZ4+m1QjXl909/6UzhTBqckRRYaDaursM+xi/E8G3gCAyz2fwtfjB2g3/9faRhxIGkHgT8d0BBU MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a27:b0:2cf:91e3:362f with SMTP id g7-20020a056e021a2700b002cf91e3362fmr6096236ile.124.1652601129690; Sun, 15 May 2022 00:52:09 -0700 (PDT) Date: Sun, 15 May 2022 00:52:09 -0700 In-Reply-To: <20220515050556.1646-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004a6f4c05df082f95@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 mnt_check_count ------------[ cut here ]------------ WARNING: CPU: 0 PID: 4324 at fs/namespace.c:1307 mnt_check_count fs/namespace.c:1307 [inline] WARNING: CPU: 0 PID: 4324 at fs/namespace.c:1307 mnt_check_count+0x14a/0x210 fs/namespace.c:1301 Modules linked in: CPU: 1 PID: 4324 Comm: syz-executor.0 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:mnt_check_count fs/namespace.c:1307 [inline] RIP: 0010:mnt_check_count+0x14a/0x210 fs/namespace.c:1301 Code: ff 89 de bf 01 00 00 00 e8 c3 ed 9d ff 83 fb 01 7e 1a 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 8b eb 9d ff e8 86 eb 9d ff <0f> 0b e8 7f eb 9d ff 49 8d be c8 00 00 00 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc90003adfe60 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88801613bb00 RSI: ffffffff81db555a RDI: 0000000000000003 RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff81db5528 R11: 0000000000000000 R12: 0000000000000002 R13: dffffc0000000000 R14: ffff88814013cda0 R15: ffffed10280279ba FS: 000055555725a400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb39859d090 CR3: 000000001a0ad000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: fput_many.part.0+0x3d/0x1a0 fs/file_table.c:375 fput_many fs/file_table.c:396 [inline] fput+0x42/0x50 fs/file_table.c:395 filp_close+0x124/0x160 fs/open.c:1329 close_fd+0x6f/0xa0 fs/file.c:671 __do_sys_close fs/open.c:1342 [inline] __se_sys_close fs/open.c:1340 [inline] __x64_sys_close+0x2f/0xa0 fs/open.c:1340 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4ef943bd2b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffc2b1ebbc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f4ef943bd2b RDX: 0000001b31d20000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f4ef959d960 R08: 0000000000000000 R09: 00007ffc2b1fa080 R10: 00007ffc2b1fa090 R11: 0000000000000293 R12: 0000000000015538 R13: 00007ffc2b1ebcc0 R14: 00007ffc2b1ebce0 R15: 0000000000000032 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=1488f396f00000 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=12375f31f00000