INFO: task syz.1.29:3951 blocked for more than 430 seconds.
      Tainted: G        W           syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.29        state:D stack:0     pid:3951  tgid:3947  ppid:3259   task_flags:0x400140 flags:0x00000002
Call Trace:
[<ffffffff86475e1e>] context_switch kernel/sched/core.c:5388 [inline]
[<ffffffff86475e1e>] __schedule+0x1cfe/0x4d9c kernel/sched/core.c:7189
[<ffffffff86478f70>] __schedule_loop kernel/sched/core.c:7268 [inline]
[<ffffffff86478f70>] schedule+0xb4/0x32c kernel/sched/core.c:7283
[<ffffffff81326a80>] fuse_wait_aborted+0x17c/0x22c fs/fuse/dev.c:2535
[<ffffffff8134b34e>] fuse_conn_destroy+0x82/0x248 fs/fuse/inode.c:2120
[<ffffffff8134c8fc>] fuse_sb_destroy fs/fuse/inode.c:2139 [inline]
[<ffffffff8134c8fc>] fuse_kill_sb_anon+0x238/0x2c8 fs/fuse/inode.c:2152
[<ffffffff80cac184>] deactivate_locked_super+0xd8/0x198 fs/super.c:476
[<ffffffff80cafacc>] vfs_get_super fs/super.c:1338 [inline]
[<ffffffff80cafacc>] get_tree_nodev+0x144/0x178 fs/super.c:1346
[<ffffffff8134f164>] fuse_get_tree+0x34c/0x418 fs/fuse/inode.c:2055
[<ffffffff80ca935a>] vfs_get_tree+0x7e/0x314 fs/super.c:1754
[<ffffffff80d4094c>] fc_mount+0x1c/0x1d8 fs/namespace.c:1193
[<ffffffff80d54b2e>] do_new_mount_fc fs/namespace.c:3758 [inline]
[<ffffffff80d54b2e>] do_new_mount fs/namespace.c:3834 [inline]
[<ffffffff80d54b2e>] path_mount+0x6ae/0x1d14 fs/namespace.c:4154
[<ffffffff80d5765e>] do_mount fs/namespace.c:4167 [inline]
[<ffffffff80d5765e>] __do_sys_mount fs/namespace.c:4383 [inline]
[<ffffffff80d5765e>] __se_sys_mount fs/namespace.c:4360 [inline]
[<ffffffff80d5765e>] __riscv_sys_mount+0x5c2/0x778 fs/namespace.c:4360
[<ffffffff80078f3a>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff86469988>] do_trap_ecall_u+0x3e4/0x638 arch/riscv/kernel/traps.c:342
[<ffffffff86494fc4>] handle_exception+0x168/0x174 arch/riscv/kernel/entry.S:232

Showing all locks held in the system:
2 locks held by kworker/0:1/10:
3 locks held by kworker/u8:2/27:
1 lock held by khungtaskd/32:
 #0: ffffffff887efca0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:836 [inline]
 #0: ffffffff887efca0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x3e/0x1a0 kernel/locking/lockdep.c:6775
2 locks held by getty/3199:
 #0: ffffaf801e4620a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x48 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008e2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3be/0x1310 drivers/tty/n_tty.c:2211
1 lock held by sshd/3244:
1 lock held by syz-executor/3258:
4 locks held by kworker/u8:3/3339:
1 lock held by syz.1.29/3951:
 #0: ffffaf8031ea00d8 (&type->s_umount_key#52/1){+.+.}-{4:4}, at: alloc_super+0x206/0xc18 fs/super.c:345
3 locks held by kworker/u8:8/4058:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007c70a>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:149
[<ffffffff8000327c>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:155
[<ffffffff80060a30>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80060a30>] dump_stack_lvl+0x114/0x1ac lib/dump_stack.c:120
[<ffffffff80060ae4>] dump_stack+0x1c/0x28 lib/dump_stack.c:129
[<ffffffff8642a062>] nmi_cpu_backtrace+0x25e/0x3b0 lib/nmi_backtrace.c:113
[<ffffffff8642a452>] nmi_trigger_cpumask_backtrace+0x29e/0x460 lib/nmi_backtrace.c:62
[<ffffffff8008a818>] arch_trigger_cpumask_backtrace+0x2c/0x40 arch/riscv/kernel/smp.c:350
[<ffffffff8643ea70>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff8643ea70>] __sys_info lib/sys_info.c:157 [inline]
[<ffffffff8643ea70>] sys_info+0x20c/0x254 lib/sys_info.c:165
[<ffffffff805201c4>] check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
[<ffffffff805201c4>] watchdog+0xa24/0x12c4 kernel/hung_task.c:561
[<ffffffff801f1488>] kthread+0x310/0x438 kernel/kthread.c:436
[<ffffffff8006a124>] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:230
[<ffffffff864950fe>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:363
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16 Comm: rcu_preempt Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: riscv-virtio,qemu (DT)
epc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
epc : _raw_spin_unlock_irqrestore+0x36/0xc0 kernel/locking/spinlock.c:198
 ra : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline]
 ra : _raw_spin_unlock_irqrestore+0x7c/0xc0 kernel/locking/spinlock.c:198
epc : ffffffff86490d06 ra : ffffffff86490d4c sp : ffff8f8000117bd0
 gp : ffffffff8a273a00 tp : ffffaf8013280000 t0 : ffffaf8072c872d0
 t1 : ffffffff8007bcb0 t2 : ffffaf8072c876a8 s0 : ffff8f8000117bf0
 s1 : 0000000000000002 a0 : 0000000000000001 a1 : ffffffff881e5e80
 a2 : 0000000000000002 a3 : 0000000000000001 a4 : 0000000000001000
 a5 : 0000000000000000 a6 : 0000000000000003 a7 : 0000000041b58ab3
 s2 : ffffffff888023d8 s3 : 0000000000000000 s4 : 0000000000000402
 s5 : ffffffff802b1778 s6 : ffff8f8000117c88 s7 : ffffffff88611240
 s8 : ffffffff88802e80 s9 : ffff8f8000117ce0 s10: ffff8f8000117c88
 s11: 0000000000000000 t3 : ffffffff8806ef90 t4 : fffffffef110047b
 t5 : fffffffef110047c t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff86490d06>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff86490d06>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline]
[<ffffffff86490d06>] _raw_spin_unlock_irqrestore+0x36/0xc0 kernel/locking/spinlock.c:198
[<ffffffff802b17e6>] prepare_to_swait_event+0xe6/0x394 kernel/sched/swait.c:120
[<ffffffff80399170>] rcu_gp_kthread+0x168/0x1cc kernel/rcu/tree.c:2281
[<ffffffff801f1488>] kthread+0x310/0x438 kernel/kthread.c:436
[<ffffffff8006a124>] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:230
[<ffffffff864950fe>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:363