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 39998C433EF for ; Thu, 12 May 2022 14:05:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354995AbiELOFM (ORCPT ); Thu, 12 May 2022 10:05:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59420 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1350311AbiELOFK (ORCPT ); Thu, 12 May 2022 10:05:10 -0400 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2607B5D5DF for ; Thu, 12 May 2022 07:05:09 -0700 (PDT) Received: by mail-io1-f69.google.com with SMTP id t1-20020a056602140100b0065393cc1dc3so3088387iov.5 for ; Thu, 12 May 2022 07:05:09 -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=Mf+SGmOPJ8hxFoqVz1yrqkfaKgwcbpjRG6BPa4pWlFc=; b=BUKyb/XrTplc8y+xLSNHhwabHi8N3FQ/xCrJU+IKIU1Ce6Nj3hcYyf8sIs5jgwQD+Z DnW11MtpbtYpTV5DWx2PK23ZCriBtf4spm1im3LaTwSF/yaHxo46H3el+L+MsGgIKD07 X86FeHFfo254dGdCYss9G9bm1FmrkjTGrPAh9t0e1axZk+zfavfEXvBOU63GIGg1Tb3E f5TNB7G3OIzBmzaFTfS/X4LFN9Co/47/mIokDNaYxhG0izj/e6XzsncYCw63/iekn4iO R1/TR5V887X4Yz2NnzGibygn/EDxEs1DFyCUrv7f/PztUUihbwoMr22q0KX3U99vIZqf QaPA== X-Gm-Message-State: AOAM530fE3xF9UpYmWyPoPpgYK1aNKshQT3zfxWlPlKDL88zEYCsK49k W6o2qOrzEvTcty6NHTwnrfN+Sxjwe3CXcKOUXjbq1Bg/5DYS X-Google-Smtp-Source: ABdhPJzTUtokRcXE9eT4uPY5zHhPJf32Dv6MYzpQ2lsTmIb5KHpdvLNYHwnldCI0qYYCbFxguwbqM0jVkKmOz5U8KO8jNlqlMywp MIME-Version: 1.0 X-Received: by 2002:a05:6638:4189:b0:32b:a06a:b007 with SMTP id az9-20020a056638418900b0032ba06ab007mr41435jab.101.1652364308550; Thu, 12 May 2022 07:05:08 -0700 (PDT) Date: Thu, 12 May 2022 07:05:08 -0700 In-Reply-To: <20220512133426.6300-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000a69d4305ded10b86@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 ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4303 at fs/namespace.c:1225 mntput_no_expire+0x965/0xfc0 fs/namespace.c:1225 Modules linked in: CPU: 1 PID: 4303 Comm: syz-executor.2 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+0x965/0xfc0 fs/namespace.c:1225 Code: 05 00 00 48 8b 35 93 a4 dd 0b b9 01 00 00 00 bf 08 00 00 00 48 c7 c2 e0 fd f0 8b e8 c5 0e 72 ff e9 15 f9 ff ff e8 bb c0 9d ff <0f> 0b e9 ca f8 ff ff e8 af c0 9d ff 0f 0b e9 be f8 ff ff e8 a3 c0 RSP: 0018:ffffc900039dfd78 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888018771d80 RSI: ffffffff81db8025 RDI: 0000000000000003 RBP: 0000000000000008 R08: 0000000000000000 R09: 0000000000000001 R10: ffffffff81db78d8 R11: 0000000000000000 R12: 0000000000000002 R13: ffff88807d666600 R14: dffffc0000000000 R15: ffffed100facccca FS: 00005555560e5400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555556a84848 CR3: 000000001a7cd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mntput+0x67/0x90 fs/namespace.c:1287 __fput+0x3ba/0x9d0 fs/file_table.c:333 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/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: 0033:0x7f215003bd2b 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:00007ffc71fd75e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f215003bd2b RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f215019d960 R08: 0000000000000000 R09: 00007ffc71fe1080 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000016e46 R13: 00007ffc71fd76e0 R14: 00007ffc71fd7700 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=10502459f00000 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=1786c8c6f00000