sd 0:0:1:0: [sda] tag#335 abort
sd 0:0:1:0: [sda] tag#326 abort
sd 0:0:1:0: device reset
INFO: task jbd2/sda1-8:1922 blocked for more than 120 seconds.
      Not tainted 4.9.98-ga03d0bb #21
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
jbd2/sda1-8     D27112  1922      2 0x00000000
 ffff8801cda38000 0000000000000000 ffff8801b7590a80 ffff88019edab000
 ffff8801db221b98 ffff8801cda47580 ffffffff839e377d 0000000041b58ab3
 ffffffff843c0f58 ffffffff81234380 00ff8801cda388c0 ffff8801db222468
Call Trace:
 [<ffffffff839e4d7f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3557
 [<ffffffff839f1191>] schedule_timeout+0x861/0xf70 kernel/time/timer.c:1768
 [<ffffffff839e2f5a>] io_schedule_timeout+0x1ba/0x390 kernel/sched/core.c:5180
 [<ffffffff839e61c9>] io_schedule include/linux/sched.h:460 [inline]
 [<ffffffff839e61c9>] bit_wait_io+0x19/0xa0 kernel/sched/wait.c:582
 [<ffffffff839e5913>] __wait_on_bit+0x93/0x120 kernel/sched/wait.c:383
 [<ffffffff839e5c48>] out_of_line_wait_on_bit+0xe8/0x120 kernel/sched/wait.c:396
 [<ffffffff8162072c>] wait_on_bit_io include/linux/wait.h:1070 [inline]
 [<ffffffff8162072c>] __wait_on_buffer+0x5c/0x70 fs/buffer.c:124
 [<ffffffff8188ed92>] wait_on_buffer include/linux/buffer_head.h:347 [inline]
 [<ffffffff8188ed92>] journal_wait_on_commit_record fs/jbd2/commit.c:176 [inline]
 [<ffffffff8188ed92>] jbd2_journal_commit_transaction+0x4342/0x6050 fs/jbd2/commit.c:875
 [<ffffffff818a0c1a>] kjournald2+0x22a/0x830 fs/jbd2/journal.c:224
 [<ffffffff8119ad5d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f481c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373

Showing all locks held in the system:
2 locks held by khungtaskd/519:
 #0:  (rcu_read_lock){......}, at: [<ffffffff813646ec>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff813646ec>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81423ba0>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/3676:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d565c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/3773:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff839f2822>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff8211cbb2>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2133
5 locks held by kworker/u4:4/4164:
 #0:  ("writeback"){++++.+}, at: [<ffffffff8118ad3e>] work_static include/linux/workqueue.h:186 [inline]
 #0:  ("writeback"){++++.+}, at: [<ffffffff8118ad3e>] set_work_data kernel/workqueue.c:617 [inline]
 #0:  ("writeback"){++++.+}, at: [<ffffffff8118ad3e>] set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0:  ("writeback"){++++.+}, at: [<ffffffff8118ad3e>] process_one_work+0x6ee/0x1500 kernel/workqueue.c:2085
 #1:  ((&(&wb->dwork)->work)){+.+.+.}, at: [<ffffffff8118ad78>] process_one_work+0x728/0x1500 kernel/workqueue.c:2089
 #2:  (&sbi->s_journal_flag_rwsem){.+.+.+}, at: [<ffffffff8145ca1f>] do_writepages+0xef/0x1d0 mm/page-writeback.c:2347
 #3:  (jbd2_handle){++++..}, at: [<ffffffff81880bb3>] start_this_handle+0x443/0xe40 fs/jbd2/transaction.c:387
 #4:  (&ei->i_data_sem){++++..}, at: [<ffffffff8173f973>] ext4_map_blocks+0x6d3/0x16d0 fs/ext4/inode.c:605
2 locks held by syz-executor2/8446:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff81565e9b>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff81565e9b>] vfs_fallocate+0x2fb/0x600 fs/open.c:328
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff817ffe32>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff817ffe32>] ext4_fallocate+0x1e2/0x1d70 fs/ext4/extents.c:4968
2 locks held by syz-executor2/8472:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff81570c12>] file_start_write include/linux/fs.h:2640 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff81570c12>] do_readv_writev+0x6d2/0x7a0 fs/read_write.c:867
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff81729d22>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff81729d22>] ext4_file_write_iter+0x122/0xd90 fs/ext4/file.c:100
3 locks held by syz-executor2/8473:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d565c>] __fdget_pos+0xac/0xd0 fs/file.c:781
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff815703be>] file_start_write include/linux/fs.h:2640 [inline]
 #1:  (sb_writers#3){.+.+.+}, at: [<ffffffff815703be>] vfs_write+0x3ae/0x530 fs/read_write.c:556
 #2:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff81729d22>] inode_lock include/linux/fs.h:766 [inline]
 #2:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff81729d22>] ext4_file_write_iter+0x122/0xd90 fs/ext4/file.c:100
2 locks held by syz-executor2/8478:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff81565e9b>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff81565e9b>] vfs_fallocate+0x2fb/0x600 fs/open.c:328
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff817ffe32>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff817ffe32>] ext4_fallocate+0x1e2/0x1d70 fs/ext4/extents.c:4968
2 locks held by syz-executor2/8479:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815ddeff>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff815ddeff>] mnt_want_write+0x3f/0xb0 fs/namespace.c:391
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff81567f28>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff81567f28>] do_truncate2+0x128/0x1f0 fs/open.c:61
2 locks held by syz-executor2/8483:
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff81570c12>] file_start_write include/linux/fs.h:2640 [inline]
 #0:  (sb_writers#3){.+.+.+}, at: [<ffffffff81570c12>] do_readv_writev+0x6d2/0x7a0 fs/read_write.c:867
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff81729d22>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff81729d22>] ext4_file_write_iter+0x122/0xd90 fs/ext4/file.c:100
1 lock held by syz-executor2/8484:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d565c>] __fdget_pos+0xac/0xd0 fs/file.c:781
4 locks held by syz-executor3/8452:
 #0:  (&mm->mmap_sem){++++++}, at: [<ffffffff810d977b>] __do_page_fault+0x36b/0xd50 arch/x86/mm/fault.c:1336
 #1:  (sb_pagefaults){.+.+..}, at: [<ffffffff8175d546>] sb_start_pagefault include/linux/fs.h:1602 [inline]
 #1:  (sb_pagefaults){.+.+..}, at: [<ffffffff8175d546>] ext4_page_mkwrite+0x166/0xff0 fs/ext4/inode.c:5775
 #2:  (&ei->i_mmap_sem){++++.+}, at: [<ffffffff8175d587>] ext4_page_mkwrite+0x1a7/0xff0 fs/ext4/inode.c:5778
 #3:  (&type->s_umount_key#23){++++.+}, at: [<ffffffff816004e9>] try_to_writeback_inodes_sb_nr+0x29/0x70 fs/fs-writeback.c:2358

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

NMI backtrace for cpu 0
CPU: 0 PID: 519 Comm: khungtaskd Not tainted 4.9.98-ga03d0bb #21
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d8467d08 ffffffff81eb0e89 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810b7da0 ffff8801d8467d40
 ffffffff81ebc187 0000000000000000 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81eb0e89>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81eb0e89>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81ebc187>] nmi_cpu_backtrace.cold.2+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81ebc11a>] nmi_trigger_cpumask_backtrace+0x12a/0x14f lib/nmi_backtrace.c:60
 [<ffffffff810b7ea4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff81364c84>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff81364c84>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff81364c84>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff81364c84>] watchdog+0x6b4/0xa20 kernel/hung_task.c:239
 [<ffffffff8119ad5d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff839f481c>] 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 0xffffffff839f3286