INFO: task loop0:6834 blocked for more than 120 seconds.
      Not tainted 4.4.119-g024f962 #26
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
loop0           D ffff8801d8b16de0 26904  6834      2 0x00000000
 ffff8801d8b16de0 ffff8801d8b16df0 0000000000000046 0000000000000000
 ffffffff81dad156 ffff880100000000 ffff8801db21fdb8 ffff8801db21fde0
 ffff8801db21f4d8 ffff8800a7b63000 ffff8801d7f1c800 ffff8801d8b17670
Call Trace:
 [<ffffffff837654fa>] schedule+0x7a/0x1b0 kernel/sched/core.c:3353
 [<ffffffff83770810>] schedule_timeout+0x3a0/0x970 kernel/time/timer.c:1515
 [<ffffffff8376348e>] io_schedule_timeout+0x1be/0x390 kernel/sched/core.c:4935
 [<ffffffff81ca6cf5>] io_schedule include/linux/sched.h:447 [inline]
 [<ffffffff81ca6cf5>] bt_get+0x305/0x760 block/blk-mq-tag.c:301
 [<ffffffff81ca7f3b>] __blk_mq_get_tag block/blk-mq-tag.c:325 [inline]
 [<ffffffff81ca7f3b>] blk_mq_get_tag+0x1eb/0x340 block/blk-mq-tag.c:353
 [<ffffffff81c98364>] __blk_mq_alloc_request+0x24/0xa50 block/blk-mq.c:215
 [<ffffffff81c9e0b1>] blk_mq_map_request+0x8d1/0xde0 block/blk-mq.c:1190
 [<ffffffff81ca1f30>] blk_sq_make_request+0x1a0/0xfc0 block/blk-mq.c:1361
 [<ffffffff81c74621>] generic_make_request+0x311/0x990 block/blk-core.c:2081
 [<ffffffff81c74e1a>] submit_bio+0x17a/0x540 block/blk-core.c:2154
 [<ffffffff815e0098>] dio_bio_submit fs/direct-io.c:409 [inline]
 [<ffffffff815e0098>] do_blockdev_direct_IO+0x6ba8/0x8810 fs/direct-io.c:1283
 [<ffffffff815e1dae>] __blockdev_direct_IO+0xae/0xe0 fs/direct-io.c:1342
 [<ffffffff815d0ae2>] blkdev_direct_IO+0xb2/0xe0 fs/block_dev.c:167
 [<ffffffff81423c10>] generic_file_read_iter+0x360/0x1160 mm/filemap.c:1791
 [<ffffffff815d1b45>] blkdev_read_iter+0x105/0x170 fs/block_dev.c:1679
 [<ffffffff824242bc>] lo_rw_aio drivers/block/loop.c:506 [inline]
 [<ffffffff824242bc>] lo_rw_simple drivers/block/loop.c:520 [inline]
 [<ffffffff824242bc>] do_req_filebacked drivers/block/loop.c:558 [inline]
 [<ffffffff824242bc>] loop_handle_cmd drivers/block/loop.c:1698 [inline]
 [<ffffffff824242bc>] loop_queue_work+0x1eac/0x31c0 drivers/block/loop.c:1710
 [<ffffffff81190b5b>] kthread_worker_fn+0x27b/0x600 kernel/kthread.c:602
 [<ffffffff81190788>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83773a45>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:506
no locks held by loop0/6834.
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 3635 Comm: rsyslogd Not tainted 4.4.119-g024f962 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800ac67c800 task.stack: ffff8801c5cd8000
RIP: 0010:[<ffffffff812f8c80>]  [<ffffffff812f8c80>] is_module_text_address+0x0/0x50 kernel/module.c:4063
RSP: 0018:ffff8801c5cdf7a0  EFLAGS: 00000202
RAX: 0000000000000001 RBX: 0000000000000003 RCX: ffffffff83810aa0
RDX: 0000000000000000 RSI: ffff8801c5cdf858 RDI: 0000000000000003
RBP: ffff8801c5cdf7b0 R08: ffff8801c5cdf8b8 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c5cdf890
R13: ffffffffffff8000 R14: ffff8801c5cdf858 R15: 0000000000000003
FS:  00007ff8f9f15700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000014723d8 CR3: 00000001d3490000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8118bb4b 0000000000000000 ffff8801c5cdf808 ffffffff810179b8
 ffff8801c5cd8000 ffff8801c5cdf890 ffff8801c5cdf8b8 ffffffff83810aa0
 0000000000000000 ffffffff83810aa0 00000000000166a0 ffff8801c5cdf8b8
Call Trace:
 [<ffffffff810179b8>] print_context_stack+0x48/0xc0 arch/x86/kernel/dumpstack.c:107
 [<ffffffff81016b95>] dump_trace+0x145/0x350 arch/x86/kernel/dumpstack_64.c:243
 [<ffffffff81035d96>] save_stack_trace+0x26/0x50 arch/x86/kernel/stacktrace.c:63
 [<ffffffff814fd173>] save_stack+0x43/0xd0 mm/kasan/kasan.c:512
 [<ffffffff814fd43d>] set_track mm/kasan/kasan.c:524 [inline]
 [<ffffffff814fd43d>] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:616
 [<ffffffff814fda12>] kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:554
 [<ffffffff814f937e>] slab_post_alloc_hook mm/slub.c:1349 [inline]
 [<ffffffff814f937e>] slab_alloc_node mm/slub.c:2615 [inline]
 [<ffffffff814f937e>] slab_alloc mm/slub.c:2623 [inline]
 [<ffffffff814f937e>] kmem_cache_alloc_trace+0xbe/0x2b0 mm/slub.c:2640
 [<ffffffff81268e6f>] kmalloc include/linux/slab.h:476 [inline]
 [<ffffffff81268e6f>] syslog_print kernel/printk/printk.c:1148 [inline]
 [<ffffffff81268e6f>] do_syslog+0x60f/0xae0 kernel/printk/printk.c:1331
 [<ffffffff8168ef34>] kmsg_read+0x74/0xa0 fs/proc/kmsg.c:39
 [<ffffffff81665cdf>] proc_reg_read+0xef/0x170 fs/proc/inode.c:202
 [<ffffffff8151cef3>] __vfs_read+0x103/0x440 fs/read_write.c:432
 [<ffffffff8151ed93>] vfs_read+0x123/0x3a0 fs/read_write.c:454
 [<ffffffff815216d9>] SYSC_read fs/read_write.c:569 [inline]
 [<ffffffff815216d9>] SyS_read+0xd9/0x1b0 fs/read_write.c:562
 [<ffffffff8377361f>] entry_SYSCALL_64_fastpath+0x1c/0x98
Code: e8 f6 b9 ea ff 65 8b 05 2f da d1 7e 85 c0 74 05 89 d8 5b 5d c3 e8 d7 a3 d0 ff 89 d8 5b 5d c3 66 90 66 2e 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 53 48 89 fb bf 01 00 00 00 e8 ce dd ea ff 48 89 df 
NMI backtrace for cpu 1
CPU: 1 PID: 485 Comm: khungtaskd Not tainted 4.4.119-g024f962 #26
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8800bb26c800 task.stack: ffff8800bacf8000
RIP: 0010:[<ffffffff810c3e67>]  [<ffffffff810c3e67>] native_apic_mem_write arch/x86/include/asm/apic.h:94 [inline]
RIP: 0010:[<ffffffff810c3e67>]  [<ffffffff810c3e67>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff810c3e67>]  [<ffffffff810c3e67>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff810c3e67>]  [<ffffffff810c3e67>] flat_send_IPI_mask+0xf7/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800bacffcb8  EFLAGS: 00000046
RAX: 0000000003000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fb300
RBP: ffff8800bacffce0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000000000003 R14: ffffffff8426f420 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd51f831000 CR3: 00000001d3490000 CR4: 0000000000160670
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff8426f420 ffffffff847efb00 fffffbfff08fda14 dffffc0000000000
 ffff8801db31bca0 ffff8800bacffd00 ffffffff810b999b ffffffff839f63c0
 0000000000000003 ffff8800bacffd60 ffffffff81d0ef94 0000000000000000
Call Trace:
 [<ffffffff810b999b>] nmi_raise_cpu_backtrace+0x5b/0x70 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81d0ef94>] nmi_trigger_all_cpu_backtrace+0x4a4/0x550 lib/nmi_backtrace.c:85
 [<ffffffff810b9a34>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff81368c5a>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff81368c5a>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81368c5a>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81368c5a>] watchdog+0x6fa/0xae0 kernel/hung_task.c:238
 [<ffffffff81190788>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff83773a45>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:506
Code: b3 5f ff f6 c4 10 75 e1 44 89 e8 c1 e0 18 89 04 25 10 b3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 b3 5f ff <41> f7 c4 00 02 00 00 74 1a e8 6b 2f 17 00 4c 89 e7 57 9d 0f 1f