INFO: task khugepaged:1087 blocked for more than 143 seconds.
Not tainted 5.4.0-rc5-next-20191031 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
khugepaged D27376 1087 2 0x80004000
Call Trace:
context_switch kernel/sched/core.c:3385 [inline]
__schedule+0x94a/0x1e70 kernel/sched/core.c:4070
schedule+0xdc/0x2b0 kernel/sched/core.c:4144
io_schedule+0x1c/0x70 kernel/sched/core.c:5788
wait_on_page_bit_common mm/filemap.c:1175 [inline]
__lock_page+0x422/0xab0 mm/filemap.c:1383
lock_page include/linux/pagemap.h:480 [inline]
mpage_prepare_extent_to_map+0xb3f/0xf90 fs/ext4/inode.c:2668
ext4_writepages+0x954/0x2e70 fs/ext4/inode.c:2822
? 0xffffffff81000000
do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
__filemap_fdatawrite_range+0x2bc/0x3b0 mm/filemap.c:421
__filemap_fdatawrite mm/filemap.c:429 [inline]
filemap_flush+0x24/0x30 mm/filemap.c:456
collapse_file+0x36b1/0x41a0 mm/khugepaged.c:1652
khugepaged_scan_file mm/khugepaged.c:1890 [inline]
khugepaged_scan_mm_slot mm/khugepaged.c:1988 [inline]
khugepaged_do_scan mm/khugepaged.c:2072 [inline]
khugepaged+0x2da9/0x4360 mm/khugepaged.c:2117
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Showing all locks held in the system:
4 locks held by kworker/u4:3/353:
#0: ffff8880a8d5e128 ((wq_completion)writeback){+.+.}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880a8d5e128 ((wq_completion)writeback){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880a8d5e128 ((wq_completion)writeback){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880a8d5e128 ((wq_completion)writeback){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880a8d5e128 ((wq_completion)writeback){+.+.}, at: set_work_data kernel/workqueue.c:614 [inline]
#0: ffff8880a8d5e128 ((wq_completion)writeback){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:641 [inline]
#0: ffff8880a8d5e128 ((wq_completion)writeback){+.+.}, at: process_one_work+0x88b/0x1740 kernel/workqueue.c:2234
#1: ffff8880a8e87dc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x8c1/0x1740 kernel/workqueue.c:2238
#2: ffff88809ac700d8 (&type->s_umount_key#32){++++}, at: trylock_super+0x22/0x110 fs/super.c:418
#3: ffff88809ac72990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
2 locks held by kworker/u4:5/435:
#0: ffff8880ae934d58 (&rq->lock){-.-.}, at: newidle_balance+0xa28/0xe80 kernel/sched/fair.c:10020
#1: ffffffff88faba40 (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:5698
1 lock held by khungtaskd/1080:
#0: ffffffff88faba40 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x279 kernel/locking/lockdep.c:5336
1 lock held by khugepaged/1087:
#0: ffff88809ac72990 (&sbi->s_journal_flag_rwsem){.+.+}, at: do_writepages+0xfa/0x2a0 mm/page-writeback.c:2344
2 locks held by rsyslogd/9395:
#0: ffff8880993cf8a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801
#1: ffffffff88fa0f78 (logbuf_lock){-.-.}, at: is_bpf_text_address+0x0/0x160 kernel/bpf/core.c:695
2 locks held by getty/9485:
#0: ffff8880a78fc090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f392e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/9486:
#0: ffff888099bfb090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f4b2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/9487:
#0: ffff888096c00090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f432e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/9488:
#0: ffff8880993e0090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f472e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/9489:
#0: ffff88809893b090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f352e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/9490:
#0: ffff8880997b6090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f3f2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by getty/9491:
#0: ffff8880a0536090 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340
#1: ffffc90005f192e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x220/0x1bf0 drivers/tty/n_tty.c:2156
2 locks held by syz-executor.2/9531:
#0: ffff888090db42b8 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1600 fs/block_dev.c:1553
#1: ffffffff89520dc0 (loop_ctl_mutex){+.+.}, at: lo_open+0x1d/0xd0 drivers/block/loop.c:1784
2 locks held by syz-executor.3/9533:
#0: ffff888090e47978 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1600 fs/block_dev.c:1553
#1: ffffffff89520dc0 (loop_ctl_mutex){+.+.}, at: lo_open+0x1d/0xd0 drivers/block/loop.c:1784
2 locks held by syz-executor.4/9538:
#0: ffff8880a31177f8 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1600 fs/block_dev.c:1553
#1: ffffffff89520dc0 (loop_ctl_mutex){+.+.}, at: lo_open+0x1d/0xd0 drivers/block/loop.c:1784
2 locks held by syz-executor.5/9543:
#0: ffff888090e468f8 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1600 fs/block_dev.c:1553
#1: ffffffff89520dc0 (loop_ctl_mutex){+.+.}, at: lo_open+0x1d/0xd0 drivers/block/loop.c:1784
1 lock held by syz-executor.0/9857:
#0: ffffffff88ff0980 (event_mutex){+.+.}, at: perf_trace_destroy+0x28/0x100 kernel/trace/trace_event_perf.c:241
1 lock held by syz-executor.1/9914:
#0: ffffffff89520dc0 (loop_ctl_mutex){+.+.}, at: __loop_clr_fd+0x88/0xd60 drivers/block/loop.c:1093
2 locks held by blkid/9922:
#0: ffff888090db5338 (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x1600 fs/block_dev.c:1553
#1: ffffffff89520dc0 (loop_ctl_mutex){+.+.}, at: lo_open+0x1d/0xd0 drivers/block/loop.c:1784
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1080 Comm: khungtaskd Not tainted 5.4.0-rc5-next-20191031 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:269 [inline]
watchdog+0xc8f/0x1350 kernel/hung_task.c:353
kthread+0x361/0x430 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9531 Comm: syz-executor.2 Not tainted 5.4.0-rc5-next-20191031 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:stack_trace_save+0x0/0xe0 kernel/stacktrace.c:115
Code: 56 e5 4c 00 e9 45 ff ff ff 4c 89 e7 e8 09 e6 4c 00 eb 94 48 89 df e8 5f e5 4c 00 e9 61 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 <48> b8 00 00 00 00 00 fc ff df 55 48 89 e5 41 56 49 89 fe 41 55 41
RSP: 0018:ffff88806d6df6b8 EFLAGS: 00000286
RAX: 000000000000253b RBX: ffff8880a3fa3670 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffff88806d6df6c0
RBP: ffff88806d6df8c8 R08: 1ffffffff14f3d44 R09: ffffed10147f46ce
R10: fffffbfff14f3d44 R11: ffffffff8a79ea27 R12: 0000000000002800
R13: ffff8880a3fa3620 R14: 0000000000000000 R15: ffff8880a09fce00
FS: 0000000001bf4940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000738008 CR3: 000000006d6ba000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
set_track mm/kasan/common.c:77 [inline]
__kasan_kmalloc mm/kasan/common.c:510 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:483
kasan_slab_alloc+0xf/0x20 mm/kasan/common.c:518
slab_post_alloc_hook mm/slab.h:584 [inline]
slab_alloc mm/slab.c:3320 [inline]
kmem_cache_alloc+0x121/0x710 mm/slab.c:3484
anon_vma_chain_alloc mm/rmap.c:130 [inline]
anon_vma_clone+0x111/0x5f0 mm/rmap.c:289
anon_vma_fork+0x8f/0x4a0 mm/rmap.c:352
dup_mmap kernel/fork.c:556 [inline]
dup_mm+0xa47/0x1430 kernel/fork.c:1361
copy_mm kernel/fork.c:1417 [inline]
copy_process+0x26e4/0x6880 kernel/fork.c:2073
_do_fork+0x146/0xf90 kernel/fork.c:2427
__do_sys_clone kernel/fork.c:2582 [inline]
__se_sys_clone kernel/fork.c:2563 [inline]
__x64_sys_clone+0x18d/0x250 kernel/fork.c:2563
do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4587ea
Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00
RSP: 002b:00007ffe7ead3bb0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffe7ead3bb0 RCX: 00000000004587ea
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffe7ead3bf0 R08: 0000000000000001 R09: 0000000001bf4940
R10: 0000000001bf4c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 00007ffe7ead3c40