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Date: Mon, 1 Jul 2019 21:42:31 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Kimberly Brown <kimbrownkd@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
David Sterba <dsterba@...e.com>,
LKML <linux-kernel@...r.kernel.org>, devel@...verdev.osuosl.org,
lkp@...org
Subject: [btrfs] 7c7e301406:
WARNING:at_fs/kernfs/dir.c:#kernfs_remove_by_name_ns
FYI, we noticed the following commit (built with gcc-7):
commit: 7c7e301406d0a93051d236600a72066278c2e4dc ("btrfs: sysfs: Replace default_attrs in ktypes with groups")
https://git.kernel.org/cgit/linux/kernel/git/gregkh/driver-core.git driver-core-testing
in testcase: xfstests
with following parameters:
disk: 6HDD
fs: btrfs
test: btrfs-group1
test-description: xfstests is a regression test suite for xfs and other files ystems.
test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git
on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+------------------------------------------------------+------------+------------+
| | d252768216 | 7c7e301406 |
+------------------------------------------------------+------------+------------+
| boot_successes | 3 | 0 |
| boot_failures | 20 | 32 |
| BUG:kernel_reboot-without-warning_in_test_stage | 19 | 4 |
| BUG:kernel_NULL_pointer_dereference,address | 1 | |
| Oops:#[##] | 1 | |
| RIP:raid#_sse21_gen_syndrome[raid#_pq] | 1 | |
| Kernel_panic-not_syncing:Fatal_exception | 1 | |
| WARNING:at_fs/kernfs/dir.c:#kernfs_remove_by_name_ns | 0 | 28 |
| RIP:kernfs_remove_by_name_ns | 0 | 28 |
+------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 326.982029] WARNING: CPU: 1 PID: 5231 at fs/kernfs/dir.c:1505 kernfs_remove_by_name_ns+0x84/0x90
[ 326.984875] Modules linked in: btrfs xor zstd_decompress zstd_compress raid6_pq libcrc32c dm_mod sr_mod cdrom crct10dif_pclmul sg crc32_pclmul crc32c_intel ata_generic pata_acpi ghash_clmulni_intel ppdev snd_pcm ata_piix aesni_intel snd_timer bochs_drm snd ttm crypto_simd drm_kms_helper cryptd joydev glue_helper libata syscopyarea sysfillrect soundcore sysimgblt serio_raw fb_sys_fops pcspkr drm i2c_piix4 floppy parport_pc parport ip_tables
[ 326.996328] CPU: 1 PID: 5231 Comm: umount Not tainted 5.2.0-rc3-00058-g7c7e301406d0a #1
[ 326.998371] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
[ 327.000473] RIP: 0010:kernfs_remove_by_name_ns+0x84/0x90
[ 327.002110] Code: 00 31 c0 5b 5d 41 5c c3 48 c7 c7 20 a4 32 8b e8 d2 27 70 00 b8 fe ff ff ff 5b 5d 41 5c c3 48 c7 c7 18 8a ef 8a e8 7c 81 d4 ff <0f> 0b b8 fe ff ff ff eb d0 0f 1f 00 66 66 66 66 90 41 57 41 56 41
[ 327.006665] RSP: 0018:ffffab59834bfd60 EFLAGS: 00010282
[ 327.008340] RAX: 0000000000000000 RBX: ffffffffc05924b8 RCX: 0000000000000000
[ 327.010327] RDX: ffff97273fd26d40 RSI: ffff97273fd17778 RDI: ffff97273fd17778
[ 327.012326] RBP: ffffffffc053c818 R08: 00000000000004a1 R09: 0000000000aaaaaa
[ 327.014338] R10: ffffd09d01f8bb40 R11: ffff97271c40f520 R12: ffffffffc0535000
[ 327.016365] R13: ffff972678ae25e0 R14: ffff97267e10a9c8 R15: dead000000000100
[ 327.018411] FS: 00007fe85f144e40(0000) GS:ffff97273fd00000(0000) knlGS:0000000000000000
[ 327.020627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 327.022473] CR2: 00000000004216d0 CR3: 000000007c81e000 CR4: 00000000000406e0
[ 327.024539] Call Trace:
[ 327.025934] remove_files+0x30/0x70
[ 327.027530] sysfs_remove_group+0x3d/0x80
[ 327.029104] sysfs_remove_groups+0x29/0x40
[ 327.030697] kobject_del+0x20/0x60
[ 327.032213] btrfs_free_block_groups+0x335/0x420 [btrfs]
[ 327.034019] close_ctree+0x17a/0x300 [btrfs]
[ 327.035619] generic_shutdown_super+0x6c/0x120
[ 327.037270] kill_anon_super+0xe/0x30
[ 327.038823] btrfs_kill_super+0x12/0xa0 [btrfs]
[ 327.040484] deactivate_locked_super+0x3f/0x70
[ 327.042143] cleanup_mnt+0x3b/0x80
[ 327.043655] task_work_run+0xa3/0xe0
[ 327.047924] exit_to_usermode_loop+0xeb/0xf0
[ 327.049515] do_syscall_64+0x1a7/0x1e0
[ 327.051022] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 327.052729] RIP: 0033:0x7fe85ea28d77
[ 327.054183] Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 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 8b 0d f1 00 2b 00 f7 d8 64 89 01 48
[ 327.058914] RSP: 002b:00007fff3462bf78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 327.061036] RAX: 0000000000000000 RBX: 000055c942629080 RCX: 00007fe85ea28d77
[ 327.063153] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000055c942629260
[ 327.065213] RBP: 000055c942629260 R08: 000055c94262a600 R09: 0000000000000015
[ 327.067315] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007fe85ef2ae64
[ 327.069427] R13: 0000000000000000 R14: 0000000000000000 R15: 00007fff3462c200
[ 327.071527] ---[ end trace 83bb75461b78c5f8 ]---
To reproduce:
# build kernel
cd linux
cp config-5.2.0-rc3-00058-g7c7e301406d0a .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
Thanks,
Rong Chen
View attachment "config-5.2.0-rc3-00058-g7c7e301406d0a" of type "text/plain" (196466 bytes)
View attachment "job-script" of type "text/plain" (5451 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (40276 bytes)
View attachment "xfstests" of type "text/plain" (6681 bytes)
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