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Date: Mon, 23 Mar 2020 17:06:48 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Josef Bacik <josef@...icpanda.com>
Cc: David Sterba <dsterba@...e.com>, Qu Wenruo <wqu@...e.com>,
LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: [btrfs] 3eba67af68:
WARNING:at_fs/btrfs/ctree.c:#__btrfs_cow_block[btrfs]
FYI, we noticed the following commit (built with gcc-7):
commit: 3eba67af68d7c7944a1810d3672accf73d38c376 ("btrfs: do not init a reloc root if we aren't relocating")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: xfstests
with following parameters:
disk: 6HDD
fs: btrfs
test: btrfs-group00
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 8G
caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):
+-------------------------------------------------------+------------+------------+
| | f5565216da | 3eba67af68 |
+-------------------------------------------------------+------------+------------+
| boot_successes | 1 | 0 |
| boot_failures | 62 | 58 |
| BUG:kernel_in_stage | 62 | 57 |
| BUG:kernel_NULL_pointer_dereference,address | 1 | 1 |
| Oops:#[##] | 1 | 1 |
| RIP:raid#_sse21_gen_syndrome[raid#_pq] | 1 | 1 |
| Kernel_panic-not_syncing:Fatal_exception | 1 | 1 |
| WARNING:at_net/sched/sch_generic.c:#dev_watchdog | 1 | |
| RIP:dev_watchdog | 1 | |
| INFO:rcu_sched_self-detected_stall_on_CPU | 1 | 1 |
| RIP:__memcpy | 1 | |
| WARNING:at_fs/btrfs/ctree.c:#__btrfs_cow_block[btrfs] | 0 | 53 |
| RIP:__btrfs_cow_block[btrfs] | 0 | 53 |
| RIP:__do_softirq | 0 | 1 |
| RIP:copy_user_generic_string | 0 | 1 |
| INFO:rcu_sched_detected_stalls_on_CPUs/tasks | 0 | 1 |
| RIP:smp_call_function_single | 0 | 1 |
+-------------------------------------------------------+------------+------------+
If you fix the issue, kindly add following tag
Reported-by: kernel test robot <rong.a.chen@...el.com>
[ 360.186179] WARNING: CPU: 1 PID: 28359 at fs/btrfs/ctree.c:1030 __btrfs_cow_block+0x7e/0x570 [btrfs]
[ 360.189443] Modules linked in: btrfs blake2b_generic xor zstd_decompress zstd_compress raid6_pq libcrc32c dm_mod intel_rapl_msr intel_rapl_common sr_mod cdrom crct10dif_pclmul sg crc32_pclmul ata_generic pata_acpi crc32c_intel bochs_drm ghash_clmulni_intel drm_vram_helper drm_ttm_helper ttm drm_kms_helper syscopyarea sysfillrect snd_pcm sysimgblt fb_sys_fops snd_timer ata_piix ppdev drm snd aesni_intel crypto_simd soundcore cryptd glue_helper parport_pc joydev serio_raw libata parport pcspkr floppy i2c_piix4 ip_tables
[ 360.212572] CPU: 1 PID: 28359 Comm: btrfs Not tainted 5.6.0-rc5-00187-g3eba67af68d7c #1
[ 360.215645] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[ 360.218809] RIP: 0010:__btrfs_cow_block+0x7e/0x570 [btrfs]
[ 360.221243] Code: a8 02 74 11 49 8b 86 90 02 00 00 48 8b 00 48 39 07 74 02 0f 0b 48 8b 43 20 a8 02 74 0f 48 8b 83 40 03 00 00 49 39 04 24 74 02 <0f> 0b 48 8b 85 88 00 00 00 48 2b 05 3a 7e f3 c2 4c 8d 7c 24 2f 48
[ 360.227758] RSP: 0018:ffffa6ec03ba3780 EFLAGS: 00010202
[ 360.230175] RAX: 0000000000000383 RBX: ffff895b5981e800 RCX: 0000000000000000
[ 360.237266] RDX: ffff895b33b47948 RSI: ffff895b5981e800 RDI: ffff895b5d1f94e0
[ 360.239752] RBP: ffff895b33b47948 R08: 0000000000000000 R09: ffffa6ec03ba3898
[ 360.241260] R10: 00000000ffffffff R11: 0000000000000001 R12: ffff895b5d1f94e0
[ 360.242739] R13: 0000000000000000 R14: ffff895b57130000 R15: 0000000000000000
[ 360.244250] FS: 00007f3afb3788c0(0000) GS:ffff895bbfd00000(0000) knlGS:0000000000000000
[ 360.247088] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 360.249575] CR2: 00000000016e1048 CR3: 00000001b341e000 CR4: 00000000000406e0
[ 360.252290] Call Trace:
[ 360.254134] ? __switch_to_asm+0x40/0x70
[ 360.256387] btrfs_cow_block+0xed/0x1b0 [btrfs]
[ 360.258823] btrfs_search_slot+0x402/0x970 [btrfs]
[ 360.261324] replace_path+0x5c8/0x900 [btrfs]
[ 360.263675] merge_reloc_root+0x1f3/0x610 [btrfs]
[ 360.266164] merge_reloc_roots+0x11e/0x330 [btrfs]
[ 360.269030] relocate_block_group+0x1b2/0x6a0 [btrfs]
[ 360.271505] btrfs_relocate_block_group+0x172/0x2e0 [btrfs]
[ 360.274027] btrfs_relocate_chunk+0x25/0xd0 [btrfs]
[ 360.276366] __btrfs_balance+0x8fa/0xb00 [btrfs]
[ 360.278620] btrfs_balance+0x495/0x6f0 [btrfs]
[ 360.280950] btrfs_ioctl_balance+0x2c2/0x370 [btrfs]
[ 360.283386] btrfs_ioctl+0xe90/0x30d0 [btrfs]
[ 360.285595] ? handle_pte_fault+0x411/0xb70
[ 360.287741] ? _copy_to_user+0x69/0x80
[ 360.289931] ? __handle_mm_fault+0x540/0x6a0
[ 360.292342] ? ksys_ioctl+0x92/0xb0
[ 360.294415] ? btrfs_ioctl_get_supported_features+0x30/0x30 [btrfs]
[ 360.297144] ksys_ioctl+0x92/0xb0
[ 360.299942] __x64_sys_ioctl+0x16/0x20
[ 360.302212] do_syscall_64+0x5b/0x1f0
[ 360.304395] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 360.306693] RIP: 0033:0x7f3afa3ff017
[ 360.308685] Code: 00 00 00 48 8b 05 81 7e 2b 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 7e 2b 00 f7 d8 64 89 01 48
[ 360.315566] RSP: 002b:00007ffe113e1878 EFLAGS: 00000206 ORIG_RAX: 0000000000000010
[ 360.318500] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f3afa3ff017
[ 360.321393] RDX: 00007ffe113e1908 RSI: 00000000c4009420 RDI: 0000000000000004
[ 360.324078] RBP: 00007ffe113e1908 R08: 00000000016d9000 R09: 0000000000000000
[ 360.327114] R10: 0000000000000541 R11: 0000000000000206 R12: 0000000000000004
[ 360.330121] R13: 00007ffe113e3bb6 R14: 0000000000000001 R15: 0000000000000000
[ 360.333106] ---[ end trace 02f259af615e9d29 ]---
To reproduce:
# build kernel
cd linux
cp config-5.6.0-rc5-00187-g3eba67af68d7c .config
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig prepare modules_prepare bzImage modules
make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 INSTALL_MOD_PATH=<mod-install-dir> modules_install
cd <mod-install-dir>
find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is attached in this email
Thanks,
Rong Chen
View attachment "config-5.6.0-rc5-00187-g3eba67af68d7c" of type "text/plain" (203581 bytes)
View attachment "job-script" of type "text/plain" (5453 bytes)
Download attachment "dmesg.xz" of type "application/x-xz" (49204 bytes)
View attachment "xfstests" of type "text/plain" (4227 bytes)
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