loop_reread_partitions: partition scan of loop0 (Ò}J§©Nw¿âS¯J) failed (rc=-13)
IPVS: Creating netns size=2536 id=10
INFO: task syz-executor5:16297 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.
syz-executor5   D28504 16297   3878 0x20020002
 ffff8801b52fc800 0000000000000000 ffff8801c9347480 ffffffff84429880
 ffff8801db221b98 ffff8801adda76e8 ffffffff838a6c0b 0000000000000001
 0000000000000007 00ff8801b52fc800 ffff8801db222468 ffff8801db222490
Call Trace:
 [<ffffffff838a81af>] schedule+0x7f/0x1b0 kernel/sched/core.c:3551
 [<ffffffff838a8b33>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3584
 [<ffffffff838ad8d2>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff838ad8d2>] mutex_lock_nested+0x312/0x870 kernel/locking/mutex.c:621
 [<ffffffff824bb19f>] lo_release+0x1f/0x160 drivers/block/loop.c:1590
 [<ffffffff8162eb57>] __blkdev_put+0x5f7/0x7e0 fs/block_dev.c:1598
 [<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
 [<ffffffff81007261>] prepare_exit_to_usermode arch/x86/entry/common.c:191 [inline]
 [<ffffffff81007261>] syscall_return_slowpath arch/x86/entry/common.c:260 [inline]
 [<ffffffff81007261>] do_syscall_32_irqs_on arch/x86/entry/common.c:331 [inline]
 [<ffffffff81007261>] do_fast_syscall_32+0x5c1/0x870 arch/x86/entry/common.c:387
 [<ffffffff838b9210>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

Showing all locks held in the system:
2 locks held by khungtaskd/514:
 #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/3655:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d449f>] __fdget_pos+0x9f/0xc0 fs/file.c:781
2 locks held by getty/3783:
 #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
2 locks held by syz-executor5/16297:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8162e61c>] __blkdev_put+0xbc/0x7e0 fs/block_dev.c:1579
 #1:  (loop_index_mutex){+.+.+.}, at: [<ffffffff824bb19f>] lo_release+0x1f/0x160 drivers/block/loop.c:1590
2 locks held by syz-executor6/16287:
 #0:  (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<ffffffff824b88bf>] lo_ioctl+0x8f/0x1990 drivers/block/loop.c:1337
 #1:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff81d37efe>] blkdev_reread_part+0x1e/0x40 block/ioctl.c:189
2 locks held by syz-executor2/16303:
 #0:  (loop_index_mutex){+.+.+.}, at: [<ffffffff824bad7a>] loop_control_ioctl+0x7a/0x300 drivers/block/loop.c:1899
 #1:  (&lo->lo_ctl_mutex#2){+.+.+.}, at: [<ffffffff824bae76>] loop_control_ioctl+0x176/0x300 drivers/block/loop.c:1913
1 lock held by syz-executor2/16316:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8162ee4c>] __blkdev_get+0x10c/0xd50 fs/block_dev.c:1268
1 lock held by syz-executor2/16322:
 #0:  (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<ffffffff824b88bf>] lo_ioctl+0x8f/0x1990 drivers/block/loop.c:1337
1 lock held by syz-executor2/16326:
 #0:  (loop_index_mutex){+.+.+.}, at: [<ffffffff824bad7a>] loop_control_ioctl+0x7a/0x300 drivers/block/loop.c:1899
1 lock held by syz-executor2/16328:
 #0:  (loop_index_mutex){+.+.+.}, at: [<ffffffff824bad7a>] loop_control_ioctl+0x7a/0x300 drivers/block/loop.c:1899
1 lock held by syz-executor2/16329:
 #0:  (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<ffffffff824b88bf>] lo_ioctl+0x8f/0x1990 drivers/block/loop.c:1337
1 lock held by syz-executor4/16309:
 #0:  (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<ffffffff824b88bf>] lo_ioctl+0x8f/0x1990 drivers/block/loop.c:1337
1 lock held by syz-executor4/16325:
 #0:  (&lo->lo_ctl_mutex/1){+.+.+.}, at: [<ffffffff824b88bf>] lo_ioctl+0x8f/0x1990 drivers/block/loop.c:1337
1 lock held by syz-executor5/16518:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8162ee4c>] __blkdev_get+0x10c/0xd50 fs/block_dev.c:1268
1 lock held by syz-executor5/16519:
 #0:  (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff8162ee4c>] __blkdev_get+0x10c/0xd50 fs/block_dev.c:1268

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

NMI backtrace for cpu 0
CPU: 0 PID: 514 Comm: khungtaskd Not tainted 4.9.89-gf361eb3 #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d87afd00 ffffffff81d96069 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810bb690 ffff8801d87afd38
 ffffffff81da118d 0000000000000000 0000000000000000 ffff8801cbbc9c18
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