binder: 9344:9352 transaction failed 29201/-71, size 32-8 line 2926
binder: undelivered TRANSACTION_ERROR: 29201
INFO: task blkid:7812 blocked for more than 120 seconds.
      Not tainted 4.9.89-gf361eb3 #2
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28152  7812   2237 0x00000006
 ffff8801cfbd4800 ffff8801cd8cf9c0 ffff8801cc2bdf80 ffff8801c4480000
 ffff8801db321b98 ffff8801ceb4f310 ffffffff838a6c0b 0000000041b58ab3
 ffffffff84194320 00ffffff8123c550 ffff8801db322468 ffff8801db322490
Call Trace:
 [<ffffffff838a81af>] schedule+0x7f/0x1b0 kernel/sched/core.c:3551
 [<ffffffff838b416c>] schedule_timeout+0x56c/0x10b0 kernel/time/timer.c:1768
 [<ffffffff838a63be>] io_schedule_timeout+0x1be/0x390 kernel/sched/core.c:5173
 [<ffffffff838a9629>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff838a9629>] bit_wait_io+0x19/0xa0 kernel/sched/wait.c:582
 [<ffffffff838a8e92>] __wait_on_bit_lock+0xc2/0x1c0 kernel/sched/wait.c:421
 [<ffffffff8143346f>] __lock_page+0xff/0x160 mm/filemap.c:934
 [<ffffffff8146ce7a>] lock_page include/linux/pagemap.h:454 [inline]
 [<ffffffff8146ce7a>] truncate_inode_pages_range+0xc1a/0x12c0 mm/truncate.c:373
 [<ffffffff8146d544>] truncate_inode_pages+0x24/0x30 mm/truncate.c:401
 [<ffffffff8162aeec>] kill_bdev+0xbc/0xf0 fs/block_dev.c:96
 [<ffffffff8162e6f1>] __blkdev_put+0x191/0x7e0 fs/block_dev.c:1586
 [<ffffffff8162fb15>] blkdev_put+0x85/0x550 fs/block_dev.c:1663
 [<ffffffff8163006b>] blkdev_close+0x8b/0xb0 fs/block_dev.c:1670
 [<ffffffff815760cc>] __fput+0x28c/0x6e0 fs/file_table.c:208
 [<ffffffff815765a5>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff81195fe5>] task_work_run+0x115/0x190 kernel/task_work.c:116
 [<ffffffff8113c997>] exit_task_work include/linux/task_work.h:21 [inline]
 [<ffffffff8113c997>] do_exit+0x7e7/0x2a40 kernel/exit.c:833
 [<ffffffff811430a8>] do_group_exit+0x108/0x320 kernel/exit.c:937
 [<ffffffff81165f24>] get_signal+0x4d4/0x14e0 kernel/signal.c:2317
 [<ffffffff81052c87>] do_signal+0x87/0x19f0 arch/x86/kernel/signal.c:807
 [<ffffffff81004ff1>] exit_to_usermode_loop+0xe1/0x120 arch/x86/entry/common.c:157
 [<ffffffff810066cf>] prepare_exit_to_usermode arch/x86/entry/common.c:191 [inline]
 [<ffffffff810066cf>] syscall_return_slowpath arch/x86/entry/common.c:260 [inline]
 [<ffffffff810066cf>] do_syscall_64+0x36f/0x490 arch/x86/entry/common.c:287
 [<ffffffff838b7ad3>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/515:
 #0:  (rcu_read_lock){......}, at: [<ffffffff81373705>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81373705>] watchdog+0x125/0xa70 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff812386b0>] debug_show_all_locks+0x70/0x280 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/3549:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d449f>] __fdget_pos+0x9f/0xc0 fs/file.c:781
2 locks held by getty/3677:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff838b5ce2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8200b5a4>] n_tty_read+0x1f4/0x16c0 drivers/tty/n_tty.c:2133
1 lock held by blkid/7812:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8162e61c>] __blkdev_put+0xbc/0x7e0 fs/block_dev.c:1579
1 lock held by syz-executor1/9336:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff81631ef8>] iterate_bdevs+0xc8/0x260 fs/block_dev.c:1976
1 lock held by syz-executor1/9350:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff81631ef8>] iterate_bdevs+0xc8/0x260 fs/block_dev.c:1976

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 515 Comm: khungtaskd Not tainted 4.9.89-gf361eb3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d85cfd00 ffffffff81d96069 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810bb690 ffff8801d85cfd38
 ffffffff81da118d 0000000000000000 0000000000000000 ffff8801cfbd4c18
Call Trace:
 [<ffffffff81d96069>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d96069>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81da118d>] nmi_cpu_backtrace+0xfd/0x120 lib/nmi_backtrace.c:99
 [<ffffffff81da12c7>] nmi_trigger_cpumask_backtrace+0x117/0x190 lib/nmi_backtrace.c:60
 [<ffffffff810bb784>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81373cd0>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81373cd0>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81373cd0>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81373cd0>] watchdog+0x6f0/0xa70 kernel/hung_task.c:239
 [<ffffffff8119af4d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff838b7c9c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at pc 0xffffffff838b6756