linux-kernel - [ide] ec7d9c9ce8: WARNING:at_fs/proc/generic.c:#remove_proc

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Message-ID: <20181220091931.zcibvplow3oxzacs@inn2.lkp.intel.com>
Date:   Thu, 20 Dec 2018 17:19:31 +0800
From:   kernel test robot <lkp@...el.com>
To:     Christoph Hellwig <hch@....de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>, lkp@...org
Subject: [ide]  ec7d9c9ce8: WARNING:at_fs/proc/generic.c:#remove_proc_entry


FYI, we noticed the following commit (built with gcc-7):

commit: ec7d9c9ce897174243af4fcd201dbfc34df0f3a3 ("ide: replace ->proc_fops with ->proc_show")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

in testcase: rcutorture
with following parameters:

	runtime: 300s
	test: default

test-description: rcutorture is rcutorture kernel module load/unload test.
test-url: https://www.kernel.org/doc/Documentation/RCU/torture.txt


on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 768M

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


+-------------------------------------------------+------------+------------+
|                                                 | 61fb5c043f | ec7d9c9ce8 |
+-------------------------------------------------+------------+------------+
| boot_successes                                  | 4          | 0          |
| boot_failures                                   | 0          | 4          |
| WARNING:at_fs/proc/generic.c:#remove_proc_entry | 0          | 4          |
| RIP:remove_proc_entry                           | 0          | 4          |
+-------------------------------------------------+------------+------------+



[   44.180514] WARNING: CPU: 1 PID: 165 at fs/proc/generic.c:662 remove_proc_entry+0xb9/0x155
[   44.196842] Modules linked in: bochs_drm(+) ttm drm_kms_helper drm input_leds piix(+) serio_raw drm_panel_orientation_quirks ide_core evbug evdev
[   44.217807] CPU: 1 PID: 165 Comm: udevd Not tainted 4.17.0-rc5-00040-gec7d9c9 #1
[   44.229700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[   44.243024] RIP: 0010:remove_proc_entry+0xb9/0x155
[   44.250863] RSP: 0018:ffffc9000020bab0 EFLAGS: 00010296
[   44.259380] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc9000020b93c
[   44.270823] RDX: 0000000000000004 RSI: 0000000000000004 RDI: 0000000000000246
[   44.282325] RBP: ffffffffa001e188 R08: 0000000000000008 R09: 0000000000000000
[   44.293739] R10: ffff8800283ab2d9 R11: ffffffff82d20e07 R12: ffff88001ebec200
[   44.305176] R13: ffffffffa0022180 R14: 0000000000000001 R15: 000000000000001b
[   44.316678] FS:  00007f9d22f99780(0000) GS:ffff88002cb00000(0000) knlGS:0000000000000000
[   44.329702] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   44.338938] CR2: 00007f9d2263e670 CR3: 000000001dc60000 CR4: 00000000000006e0
[   44.350383] Call Trace:
[   44.354594]  ide_proc_unregister_device+0x19/0x53 [ide_core]
[   44.364085]  drive_release_dev+0x10/0x39 [ide_core]
[   44.371964]  device_release+0x53/0x7b
[   44.377989]  kobject_put+0x76/0x8d
[   44.384015]  __ide_port_unregister_devices+0x1d/0x43 [ide_core]
[   44.393931]  ide_host_remove+0x51/0x101 [ide_core]
[   44.413087]  ide_pci_remove+0x4f/0x81 [ide_core]
[   44.420374]  pci_device_remove+0x23/0x4d
[   44.426440]  driver_probe_device+0x18a/0x30f
[   44.433112]  __driver_attach+0x6b/0x8b
[   44.439045]  ? driver_probe_device+0x30f/0x30f
[   44.445917]  bus_for_each_dev+0x5f/0xa0
[   44.452003]  bus_add_driver+0xe4/0x1c9
[   44.457812]  driver_register+0x7d/0xaf
[   44.463765]  piix_ide_init+0xb1/0x1000 [piix]
[   44.470604]  ? fs_reclaim_release+0x9/0x22
[   44.476925]  ? 0xffffffffa004b000
[   44.482171]  do_one_initcall+0x6e/0x144
[   44.488137]  do_init_module+0x72/0x3b6
[   44.493715]  load_module+0x1c8b/0x1ec1
[   44.499611]  ? vfs_read+0xfe/0x10a
[   44.504987]  ? __se_sys_finit_module+0x90/0xb6
[   44.511865]  __se_sys_finit_module+0x90/0xb6
[   44.518537]  do_syscall_64+0xe7/0x16c
[   44.524270]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   44.532115] RIP: 0033:0x7f9d2266e4a9
[   44.537724] RSP: 002b:00007ffc4a1959c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[   44.549316] RAX: ffffffffffffffda RBX: 0000000000647160 RCX: 00007f9d2266e4a9
[   44.560147] RDX: 0000000000000000 RSI: 00007f9d2293a0aa RDI: 0000000000000008
[   44.571101] RBP: 00007f9d2293a0aa R08: 0000000000000000 R09: 0000000000647160
[   44.581960] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000000
[   44.592881] R13: 0000000000020000 R14: 0000000000000000 R15: 0000000000647160
[   44.603836] Code: 8d b8 a8 00 00 00 e8 53 32 54 00 48 c7 c7 60 e3 03 82 e8 e2 45 55 00 48 85 db 75 13 48 89 ee 48 c7 c7 8f 1b ec 81 e8 55 45 eb ff <0f> 0b eb 7a 48 89 df e8 d0 b4 ff ff 8b 83 c8 00 00 00 66 25 00 
[   44.633074] ---[ end trace d0fa34ec8e604638 ]---


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email



Thanks,
Rong Chen

View attachment "config-4.17.0-rc5-00040-gec7d9c9" of type "text/plain" (115748 bytes)

View attachment "job-script" of type "text/plain" (4438 bytes)

Download attachment "dmesg.xz" of type "application/x-xz" (12868 bytes)