INFO: task syz-executor.4:10081 can't die for more than 143 seconds.
task:syz-executor.4  state:D stack:25896 pid:10081 ppid:  8515 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3773 [inline]
 __schedule+0x893/0x2130 kernel/sched/core.c:4522
 schedule+0xcf/0x270 kernel/sched/core.c:4600
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1881
 gfs2_gl_hash_clear+0x240/0x270 fs/gfs2/glock.c:1989
 gfs2_fill_super+0x1e81/0x23f0 fs/gfs2/ops_fstype.c:1233
 get_tree_bdev+0x421/0x740 fs/super.c:1344
 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1256
 vfs_get_tree+0x89/0x2f0 fs/super.c:1549
 do_new_mount fs/namespace.c:2896 [inline]
 path_mount+0x12ae/0x1e70 fs/namespace.c:3227
 do_mount fs/namespace.c:3240 [inline]
 __do_sys_mount fs/namespace.c:3448 [inline]
 __se_sys_mount fs/namespace.c:3425 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3425
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4608aa
Code: Unable to access opcode bytes at RIP 0x460880.
RSP: 002b:00007f899364fa88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f899364fb20 RCX: 00000000004608aa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f899364fae0
RBP: 00007f899364fae0 R08: 00007f899364fb20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20
INFO: task syz-executor.4:10081 blocked for more than 143 seconds.
      Not tainted 5.9.0-next-20201021-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:25896 pid:10081 ppid:  8515 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3773 [inline]
 __schedule+0x893/0x2130 kernel/sched/core.c:4522
 schedule+0xcf/0x270 kernel/sched/core.c:4600
 schedule_timeout+0x148/0x250 kernel/time/timer.c:1881
 gfs2_gl_hash_clear+0x240/0x270 fs/gfs2/glock.c:1989
 gfs2_fill_super+0x1e81/0x23f0 fs/gfs2/ops_fstype.c:1233
 get_tree_bdev+0x421/0x740 fs/super.c:1344
 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1256
 vfs_get_tree+0x89/0x2f0 fs/super.c:1549
 do_new_mount fs/namespace.c:2896 [inline]
 path_mount+0x12ae/0x1e70 fs/namespace.c:3227
 do_mount fs/namespace.c:3240 [inline]
 __do_sys_mount fs/namespace.c:3448 [inline]
 __se_sys_mount fs/namespace.c:3425 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3425
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4608aa
Code: Unable to access opcode bytes at RIP 0x460880.
RSP: 002b:00007f899364fa88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f899364fb20 RCX: 00000000004608aa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f899364fae0
RBP: 00007f899364fae0 R08: 00007f899364fb20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20

Showing all locks held in the system:
1 lock held by khungtaskd/1656:
 #0: ffffffff8b3361a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259
1 lock held by in:imklog/8196:
 #0: ffff888020679770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932
1 lock held by syz-executor.4/10081:
 #0: ffff888067efe0e0 (&type->s_umount_key#53/1){+.+.}-{3:3}, at: alloc_super+0x201/0xaf0 fs/super.c:229

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

NMI backtrace for cpu 1
CPU: 1 PID: 1656 Comm: khungtaskd Not tainted 5.9.0-next-20201021-syzkaller #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+0x107/0x163 lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline]
 watchdog+0xd89/0xf30 kernel/hung_task.c:339
 kthread+0x3af/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:111 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1c9/0x250 drivers/acpi/processor_idle.c:517