When running `lvm lvcreate --type raid5 --size 4194304B --name meta_r5
LVMTEST12279nqymhamb_vg --yes` there's a warning followed by the bug.
Also at [ 192.140142] it looks like there is an uninitialized
variable somewhere.
env: rawhide, kvm, 2 (V)CPUs
lvm2: upstream
kernel: 4.12.0-0.rc1.git1.1.fc27.x86_64
----
[ 192.131076] mdX: bitmap file is out of date, doing full recovery
[ 192.140142] percpu ref ( (null)) <= 0
(-9223372036854775807) after switching to atomic
[ 192.140180] ------------[ cut here ]------------
[ 192.143734] WARNING: CPU: 0 PID: 10 at lib/percpu-refcount.c:155
percpu_ref_switch_to_atomic_rcu+0x1cd/0x1f0
[ 192.146353] Modules linked in: dm_raid raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq ...|dm_thin_pool
dm_cache_smq dm_cache dm_persistent_data dm_bio_prison libcrc32c loop
crct10dif_pclmul crc32_pclmul crc32c_intel ...|ppdev
ghash_clmulni_intel acpi_cpufreq virtio_net virtio_balloon tpm_tis
joydev tpm_tis_core parport_pc parport tpm i2c_piix4
...|virtio_blk cirrus drm_kms_helper ttm drm serio_raw virtio_pci
virtio_ring virtio ata_generic pata_acpi
[ 192.154276] CPU: 0 PID: 10 Comm: rcuos/0 Not tainted
4.12.0-0.rc1.git1.1.fc27.x86_64 #1
[ 192.155684] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
[ 192.156741] task: ffff8d5bb6e73100 task.stack: ffffa9a3c0360000
[ 192.157830] RIP: 0010:percpu_ref_switch_to_atomic_rcu+0x1cd/0x1f0
[ 192.158956] RSP: 0018:ffffa9a3c0363e50 EFLAGS: 00010282
[ 192.159899] RAX: 0000000000000053 RBX: 8000000000000000 RCX:
0000000000000000
[ 192.161192] RDX: 0000000000000000 RSI: ffff8d5bb6e73d90 RDI:
0000000000000247
[ 192.162483] RBP: ffffa9a3c0363e68 R08: 0000000000000000 R09:
0000000000000000
[ 192.163762] R10: ffffa9a3c0363e00 R11: 0000000000000000 R12:
0000000000000000
[ 192.165144] R13: ffff8d5bb5252580 R14: ffff8d5bb5252580 R15:
0000000000000000
[ 192.166437] FS: 0000000000000000(0000) GS:ffff8d5bb7800000(0000)
knlGS:0000000000000000
[ 192.169392] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 192.171893] CR2: 00007ffc83d87d98 CR3: 0000000013e11000 CR4:
00000000000006f0
[ 192.174692] Call Trace:
[ 192.176627] ? percpu_ref_reinit+0x140/0x140
[ 192.178875] rcu_nocb_kthread+0x1ae/0x580
[ 192.181174] kthread+0x133/0x150
[ 192.183305] ? rcu_eqs_enter_common.constprop.68+0x1c0/0x1c0
[ 192.185813] ? kthread_create_on_node+0x70/0x70
[ 192.188110] ret_from_fork+0x31/0x40
[ 192.190338] Code: ff ff ff 80 3d a6 71 b9 00 00 0f 85 c1 fe ff ff
49 8b 55 d8 49 8b 75 e8 48 c7 c7 f0 2b ce 8b c6 05 8a 71 b9 00
...|01 e8 89 95 d4 ff <0f> ff e9 9f fe ff ff f0 49 83 6d d8 01 0f 85
05 ff ff ff 48 89
[ 192.196842] ---[ end trace fbf926294c454ffa ]---
[ 192.199425] ------------[ cut here ]------------
[ 192.200346] kernel BUG at lib/percpu-refcount.c:192!
[ 192.200346] invalid opcode: 0000 [#1] SMP
[ 192.200346] Modules linked in: dm_raid raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq ...|dm_thin_pool
dm_cache_smq dm_cache dm_persistent_data dm_bio_prison libcrc32c loop
crct10dif_pclmul crc32_pclmul crc32c_intel ...|ppdev
ghash_clmulni_intel acpi_cpufreq virtio_net virtio_balloon tpm_tis
joydev tpm_tis_core parport_pc parport tpm i2c_piix4
...|virtio_blk cirrus drm_kms_helper ttm drm serio_raw virtio_pci
virtio_ring virtio ata_generic pata_acpi
[ 192.211647] CPU: 0 PID: 13767 Comm: mdX_raid5 Tainted: G W
4.12.0-0.rc1.git1.1.fc27.x86_64 #1
[ 192.211647] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
[ 192.211647] task: ffff8d5bb15f3100 task.stack: ffffa9a3c0d10000
[ 192.211647] RIP: 0010:__percpu_ref_switch_mode+0x278/0x280
[ 192.211647] RSP: 0018:ffffa9a3c0d13ce8 EFLAGS: 00010046
[ 192.211647] RAX: 0000000000000001 RBX: ffff8d5bb5252558 RCX:
0000000000000000
[ 192.211647] RDX: 0000000000000001 RSI: ffffffff8c05a098 RDI:
0000000000000046
[ 192.211647] RBP: ffffa9a3c0d13d30 R08: 0000000000000001 R09:
0000000000000000
[ 192.211647] R10: ffffa9a3c0d13ca0 R11: ffffffff8c05a098 R12:
0000000000000000
[ 192.211647] R13: 0000000000000000 R14: ffff8d5bb15f3100 R15:
ffff8d5bb508f000
[ 192.211647] FS: 0000000000000000(0000) GS:ffff8d5bb7800000(0000)
knlGS:0000000000000000
[ 192.211647] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 192.211647] CR2: 00007ffc83d87d98 CR3: 0000000013e11000 CR4:
00000000000006f0
[ 192.211647] Call Trace:
[ 192.211647] percpu_ref_switch_to_percpu+0x27/0x40
[ 192.211647] set_in_sync+0xd4/0xe0
[ 192.211647] md_check_recovery+0x1f5/0x4e0
[ 192.211647] raid5d+0x56/0x6a0 [raid456]
[ 192.211647] ? finish_wait+0x72/0x90
[ 192.211647] ? trace_hardirqs_on_caller+0xf4/0x190
[ 192.211647] ? trace_hardirqs_on+0xd/0x10
[ 192.211647] md_thread+0x138/0x180
[ 192.211647] ? md_thread+0x138/0x180
[ 192.211647] ? finish_wait+0x90/0x90
[ 192.211647] kthread+0x133/0x150
[ 192.211647] ? find_pers+0x70/0x70
[ 192.211647] ? kthread_create_on_node+0x70/0x70
[ 192.211647] ret_from_fork+0x31/0x40
[ 192.211647] Code: f0 4a c8 8b be d5 03 00 00 48 c7 c7 b1 75 c7 8b
c6 05 ef 75 b9 00 01 e8 97 d2 c4 ff e9 e8 fe ff ff f0 48 83 03
...|01 e9 bf fe ff ff <0f> 0b e8 21 d9 be ff 90 55 48 89 e5 41 55 41
54 53 48 89 fb 48
[ 192.211647] RIP: __percpu_ref_switch_mode+0x278/0x280 RSP:
ffffa9a3c0d13ce8
[ 192.211647] ---[ end trace fbf926294c454ffb ]---
[ 192.211647] BUG: sleeping function called from invalid context at
./include/linux/percpu-rwsem.h:33
[ 192.211647] in_atomic(): 1, irqs_disabled(): 1, pid: 13767, name:
mdX_raid5
[ 192.211647] INFO: lockdep is turned off.
[ 192.211647] irq event stamp: 68
[ 192.211647] hardirqs last enabled at (67): [<ffffffff8b983586>]
_raw_spin_unlock_irqrestore+0x36/0x60
[ 192.211647] hardirqs last disabled at (68): [<ffffffff8b983c47>]
_raw_spin_lock_irqsave+0x27/0x90
[ 192.211647] softirqs last enabled at (0): [<ffffffff8b0ae308>]
copy_process.part.26+0x618/0x1ee0
[ 192.211647] softirqs last disabled at (0): [< (null)>] (null)
[ 192.211647] CPU: 0 PID: 13767 Comm: mdX_raid5 Tainted: G D W
4.12.0-0.rc1.git1.1.fc27.x86_64 #1
[ 192.211647] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
[ 192.211647] Call Trace:
[ 192.211647] dump_stack+0x8e/0xcd
[ 192.211647] ___might_sleep+0x144/0x260
[ 192.211647] __might_sleep+0x4a/0x80
[ 192.211647] exit_signals+0x33/0x240
[ 192.211647] do_exit+0xb4/0xd30
[ 192.211647] ? kthread+0x133/0x150
[ 192.211647] ? find_pers+0x70/0x70
[ 192.211647] rewind_stack_do_exit+0x17/0x20
[ 192.211647] note: mdX_raid5[13767] exited with preempt_count 2
[ 220.071005] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 22s!
[lvm:13678]
[ 220.071079] Modules linked in: dm_raid raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx xor raid6_pq ...|dm_thin_pool
dm_cache_smq dm_cache dm_persistent_data dm_bio_prison libcrc32c loop
crct10dif_pclmul crc32_pclmul crc32c_intel ...|ppdev
ghash_clmulni_intel acpi_cpufreq virtio_net virtio_balloon tpm_tis
joydev tpm_tis_core parport_pc parport tpm i2c_piix4
...|virtio_blk cirrus drm_kms_helper ttm drm serio_raw virtio_pci
virtio_ring virtio ata_generic pata_acpi
[ 220.083131] irq event stamp: 313716
[ 220.087117] hardirqs last enabled at (313715):
[<ffffffff8b983da7>] entry_SYSCALL_64_fastpath+0x5/0xbe
[ 220.091109] hardirqs last disabled at (313716):
[<ffffffff8b97afe4>] __schedule+0xc4/0xb40
[ 220.091109] softirqs last enabled at (301518):
[<ffffffff8b988d52>] __do_softirq+0x382/0x4ed
[ 220.095114] softirqs last disabled at (301511):
[<ffffffff8b0b8e7f>] irq_exit+0x10f/0x120
[ 220.099150] CPU: 1 PID: 13678 Comm: lvm Tainted: G D W
4.12.0-0.rc1.git1.1.fc27.x86_64 #1
[ 220.103049] Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2007
[ 220.103049] task: ffff8d5bb3c03100 task.stack: ffffa9a3c155c000
[ 220.107103] RIP: 0010:queued_spin_lock_slowpath+0x25/0x1b0
[ 220.107103] RSP: 0018:ffffa9a3c155f720 EFLAGS: 00000202 ORIG_RAX:
ffffffffffffff10
[ 220.111144] RAX: 0000000000000001 RBX: ffff8d5bb5252448 RCX:
0000000000000000
[ 220.115126] RDX: 0000000000000001 RSI: 0000000000000001 RDI:
ffff8d5bb5252448
[ 220.115126] RBP: ffffa9a3c155f720 R08: 0000000000000000 R09:
0000000000000000
[ 220.119130] R10: ffffa9a3c155f6d0 R11: ffff8d5bb3c03100 R12:
ffff8d5bb5252448
[ 220.123139] R13: ffff8d5bb5252448 R14: ffff8d5bb379ca20 R15:
ffff8d5bb5252058
[ 220.127118] FS: 00007f1f8253b880(0000) GS:ffff8d5bb7a00000(0000)
knlGS:0000000000000000
[ 220.127118] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 220.131158] CR2: 00007fe2715ae000 CR3: 0000000075108000 CR4:
00000000000006e0
[ 220.135114] Call Trace:
[ 220.135114] do_raw_spin_lock+0xb2/0xc0
[ 220.139145] _raw_spin_lock+0x55/0x70
[ 220.139145] md_write_start+0x143/0x360
[ 220.143126] ? probe_sched_wakeup+0x1c/0x20
[ 220.143126] ? check_preempt_curr+0x27/0xb0
[ 220.147147] raid5_make_request+0xd0/0x1060 [raid456]
[ 220.147147] ? _raw_spin_unlock_irqrestore+0x5b/0x60
[ 220.151162] ? try_to_wake_up+0x58/0x520
[ 220.151162] ? finish_wait+0x90/0x90
[ 220.155099] ? mempool_alloc_slab+0x1d/0x30
[ 220.155099] ? finish_wait+0x90/0x90
[ 220.159136] raid_map+0x2b/0x40 [dm_raid]
[ 220.159136] __map_bio+0xc9/0x2b0
[ 220.163115] ? dm_put_table_device+0xd0/0xd0
[ 220.163115] __split_and_process_bio+0x293/0x590
[ 220.167133] dm_make_request+0x7f/0x120
[ 220.167133] ? generic_make_request+0xf9/0x3b0
[ 220.171131] generic_make_request+0x126/0x3b0
[ 220.171131] ? iov_iter_get_pages+0xc9/0x300
[ 220.175138] submit_bio+0x73/0x150
[ 220.175138] ? submit_bio+0x73/0x150
[ 220.179132] ? bio_iov_iter_get_pages+0xe0/0x120
[ 220.179132] ? __blkdev_direct_IO_simple+0x168/0x320
[ 220.183114] __blkdev_direct_IO_simple+0x184/0x320
[ 220.183114] ? lock_acquire+0xa3/0x1f0
[ 220.187129] ? bdput+0x20/0x20
[ 220.187129] blkdev_direct_IO+0x3b1/0x3e0
[ 220.191112] ? blkdev_direct_IO+0x3b1/0x3e0
[ 220.191112] ? current_time+0x1a/0x70
[ 220.195108] ? trace_hardirqs_on+0xd/0x10
[ 220.195108] generic_file_direct_write+0x9c/0x110
[ 220.199114] ? generic_file_direct_write+0x9c/0x110
[ 220.199114] __generic_file_write_iter+0xbe/0x1d0
[ 220.199114] blkdev_write_iter+0x96/0x110
[ 220.203115] __vfs_write+0xe8/0x160
[ 220.203115] ? __vfs_write+0xe8/0x160
[ 220.207211] vfs_write+0xc6/0x1c0
[ 220.207211] SyS_write+0x58/0xc0
[ 220.207211] entry_SYSCALL_64_fastpath+0x1f/0xbe
[ 220.211130] RIP: 0033:0x7f1f81309290
[ 220.211130] RSP: 002b:00007fffba453af8 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[ 220.215116] RAX: ffffffffffffffda RBX: 0000000000000001 RCX:
00007f1f81309290
[ 220.215116] RDX: 0000000000001000 RSI: 000055f0c4ab4000 RDI:
000000000000000c
[ 220.219114] RBP: 00007f1f815d5583 R08: fffffffffffffff0 R09:
0000000000000000
[ 220.219114] R10: 00007f1f815d4b38 R11: 0000000000000246 R12:
0000000000000001
[ 220.223148] R13: 0000000000000001 R14: 00007f1f815d5500 R15:
00007f1f815d08c0
[ 220.223148] Code: 1f 80 00 00 00 00 66 66 66 66 90 55 48 89 e5 66
66 90 66 90 ba 01 00 00 00 8b 07 85 c0 75 0a f0 0f b1 17 85 c0
...|75 f2 5d c3 f3 90 <eb> ec 81 fe 00 01 00 00 0f 84 1a 01 00 00 41
b8 01 01 00 00 b9
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