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 D3A1FC433F5 for ; Thu, 12 May 2022 12:20:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353616AbiELMUM (ORCPT ); Thu, 12 May 2022 08:20:12 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353606AbiELMUJ (ORCPT ); Thu, 12 May 2022 08:20:09 -0400 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E788A2469F6 for ; Thu, 12 May 2022 05:20:08 -0700 (PDT) Received: by mail-il1-f198.google.com with SMTP id f18-20020a926a12000000b002be48b02bc6so3087471ilc.17 for ; Thu, 12 May 2022 05:20:08 -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=ECsNBH3R+758KxYtoRcfDChqnInBt6dPUMitEt/42zs=; b=5+u64sk6zb11Gez+p5yfUvBJVMUYu15PsQ35elmWuC0JKEutMppQDNxErHUOOGWrWF O4NWHXeWh8QZtok4ykfDP6cLqFCW8VchZG9z9EPOII313pKWuhXwDd7n9K+y5IaAlmuh YcvTDVA3Z5V/C+NY86D8zO1yXm0iT6Vpptssp2ndLFaCsrtEviooAkGwmszpaGvbTp7d j9luRWYRkgGGYcRkUItW9squLcepPMJ9dehvRk2M6Vj7tBUF175d7Rknk39BK9b5DHsQ vxWR5h0wLpmEFH6+VNgUKzl34xsk8xpPOsQ2ozvKPWzIpn8bcfzsbPeEW9g08+vv1hhj dshw== X-Gm-Message-State: AOAM530xPg/8x9HYeEK3/hT1GdqdLsb5bIpCmFHa20wUG+R319AqTTTx V23h/vhL8hSiqLC5vEfG5TSd7aBWJYH9dOkqX0HIM+s0pAjm X-Google-Smtp-Source: ABdhPJyRFrAKLktRcsRS/D1IXedH0tWevtoDU+ZVekRKWKSPlU1cH3jSpbBtwBAEGWDrs+v3InPMwTcG2Y3hXlKCrkDgizB6fov2 MIME-Version: 1.0 X-Received: by 2002:a05:6602:26cb:b0:648:f391:c37d with SMTP id g11-20020a05660226cb00b00648f391c37dmr13222406ioo.198.1652358008274; Thu, 12 May 2022 05:20:08 -0700 (PDT) Date: Thu, 12 May 2022 05:20:08 -0700 In-Reply-To: <20220512120234.6088-1-hdanton@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000020077105decf94ea@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: 4071 at fs/namespace.c:1236 mntput_no_expire+0xada/0xcd0 fs/namespace.c:1236 Modules linked in: CPU: 1 PID: 4071 Comm: syz-executor.4 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+0xada/0xcd0 fs/namespace.c:1236 Code: 30 84 c0 0f 84 b9 fe ff ff 3c 03 0f 8f b1 fe ff ff 4c 89 44 24 10 e8 45 50 e9 ff 4c 8b 44 24 10 e9 9d fe ff ff e8 46 bf 9d ff <0f> 0b e9 19 fd ff ff e8 3a bf 9d ff e8 75 cf 91 07 31 ff 89 c5 89 RSP: 0018:ffffc9000324fcf0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 1ffff92000649fa4 RCX: 0000000000000000 RDX: ffff88807ccd0000 RSI: ffffffff81db819a RDI: 0000000000000003 RBP: ffff888022660c00 R08: 0000000000000000 R09: ffffffff9006d94f R10: ffffffff81db7eb1 R11: 0000000000000001 R12: 0000000000000008 R13: ffffc9000324fd40 R14: 00000000ffffffff R15: 0000000000000002 FS: 0000555556484400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005567c4d8d680 CR3: 0000000022908000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: path_umount+0x925/0x10d0 fs/namespace.c:1809 ksys_umount fs/namespace.c:1828 [inline] __do_sys_umount fs/namespace.c:1833 [inline] __se_sys_umount fs/namespace.c:1831 [inline] __x64_sys_umount+0x159/0x180 fs/namespace.c:1831 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: 0033:0x7f0dfe48a557 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 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:00007ffef4140618 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0dfe48a557 RDX: 00007ffef41406ea RSI: 000000000000000a RDI: 00007ffef41406e0 RBP: 00007ffef41406e0 R08: 00000000ffffffff R09: 00007ffef41404b0 R10: 00005555564858b3 R11: 0000000000000246 R12: 00007f0dfe4e21f8 R13: 00007ffef41417a0 R14: 0000555556485810 R15: 00007ffef41417e0 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=159cbc4ef00000 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=1449df71f00000