INFO: task syz.3.1170:7647 blocked for more than 430 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1170      state:D stack:0     pid:7647  tgid:7643  ppid:6136   task_flags:0x400140 flags:0x00000002
Call Trace:
[<ffffffff8643b1e2>] context_switch kernel/sched/core.c:5298 [inline]
[<ffffffff8643b1e2>] __schedule+0x18fa/0x4578 kernel/sched/core.c:6911
[<ffffffff8643df14>] __schedule_loop kernel/sched/core.c:6993 [inline]
[<ffffffff8643df14>] schedule+0xb4/0x334 kernel/sched/core.c:7008
[<ffffffff8130ffc4>] request_wait_answer+0x474/0x6a8 fs/fuse/dev.c:585
[<ffffffff813105cc>] __fuse_request_send fs/fuse/dev.c:599 [inline]
[<ffffffff813105cc>] __fuse_simple_request+0x3d4/0xcac fs/fuse/dev.c:693
[<ffffffff813466c6>] fuse_simple_request fs/fuse/fuse_i.h:1263 [inline]
[<ffffffff813466c6>] fuse_send_init+0x3a2/0x570 fs/fuse/inode.c:1554
[<ffffffff8134a9ee>] fuse_fill_super+0x202/0x268 fs/fuse/inode.c:1957
[<ffffffff80caf732>] vfs_get_super fs/super.c:1327 [inline]
[<ffffffff80caf732>] get_tree_nodev+0xd2/0x178 fs/super.c:1346
[<ffffffff813440e2>] fuse_get_tree+0x232/0x5ac fs/fuse/inode.c:2026
[<ffffffff80ca921e>] vfs_get_tree+0x7e/0x314 fs/super.c:1754
[<ffffffff80d40078>] fc_mount+0x1c/0x1d8 fs/namespace.c:1193
[<ffffffff80d53b42>] do_new_mount_fc fs/namespace.c:3763 [inline]
[<ffffffff80d53b42>] do_new_mount fs/namespace.c:3839 [inline]
[<ffffffff80d53b42>] path_mount+0x6ae/0x1d14 fs/namespace.c:4159
[<ffffffff80d561d6>] do_mount fs/namespace.c:4172 [inline]
[<ffffffff80d561d6>] __do_sys_mount fs/namespace.c:4361 [inline]
[<ffffffff80d561d6>] __se_sys_mount fs/namespace.c:4338 [inline]
[<ffffffff80d561d6>] __riscv_sys_mount+0x5c2/0x778 fs/namespace.c:4338
[<ffffffff80077f32>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff8642f88e>] do_trap_ecall_u+0x402/0x680 arch/riscv/kernel/traps.c:344
[<ffffffff86459c22>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232

Showing all locks held in the system:
1 lock held by khungtaskd/33:
 #0: ffffffff887f4620 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a8 kernel/locking/lockdep.c:6771
1 lock held by syslogd/3008:
2 locks held by getty/3164:
 #0: ffffaf801dbcc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3a/0x48 drivers/tty/tty_ldsem.c:340
 #1: ffff8f800008e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3be/0x1324 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/3188:
5 locks held by syz-executor/3200:
3 locks held by kworker/u8:7/3759:
3 locks held by kworker/u8:5/5794:
3 locks held by kworker/1:2/7417:
1 lock held by syz.3.1170/7647:
 #0: ffffaf80300c20e0 (&type->s_umount_key#60/1){+.+.}-{4:4}, at: alloc_super+0x18a/0xb14 fs/super.c:345
3 locks held by kworker/u8:10/8014:
3 locks held by kworker/0:5/8066:
1 lock held by syz.4.1218/8091:
1 lock held by syz-executor/8093:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 33 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: riscv-virtio,qemu (DT)
Call Trace:
[<ffffffff8007b2b6>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:149
[<ffffffff80003384>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:155
[<ffffffff800601d0>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff800601d0>] dump_stack_lvl+0x114/0x1ac lib/dump_stack.c:120
[<ffffffff80060284>] dump_stack+0x1c/0x28 lib/dump_stack.c:129
[<ffffffff863f103a>] nmi_cpu_backtrace+0x25e/0x3b0 lib/nmi_backtrace.c:113
[<ffffffff863f142a>] nmi_trigger_cpumask_backtrace+0x29e/0x460 lib/nmi_backtrace.c:62
[<ffffffff80088d20>] arch_trigger_cpumask_backtrace+0x2c/0x40 arch/riscv/kernel/smp.c:350
[<ffffffff8640592c>] trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
[<ffffffff8640592c>] __sys_info lib/sys_info.c:157 [inline]
[<ffffffff8640592c>] sys_info+0x20c/0x254 lib/sys_info.c:165
[<ffffffff8051de96>] check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
[<ffffffff8051de96>] watchdog+0xab2/0x127c kernel/hung_task.c:515
[<ffffffff801ee044>] kthread+0x31c/0x444 kernel/kthread.c:436
[<ffffffff80069138>] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:228
[<ffffffff86459d52>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:363
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 3188 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
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:194
 ra : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline]
 ra : _raw_spin_unlock_irqrestore+0x7c/0xc0 kernel/locking/spinlock.c:194
epc : ffffffff8645596a ra : ffffffff864559b0 sp : ffff8f8000007ba0
 gp : ffffffff8a229d40 tp : ffffaf801a5c4f80 t0 : ffff8f8000007c00
 t1 : ffffffff8007a85c t2 : ffffffff802754c4 s0 : ffff8f8000007bc0
 s1 : 0000000000000002 a0 : 0000000000000000 a1 : ffffffff88126298
 a2 : 0000000000000003 a3 : 0000000000000001 a4 : 0000000000001000
 a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000041b58ab3
 s2 : ffffffff915912f0 s3 : ffff8f8000007c80 s4 : 0000000000000002
 s5 : ffffaf803566c540 s6 : 1ffff1f000000f7c s7 : ffffffff915912f0
 s8 : 0000000200000122 s9 : fffffffef144db94 s10: 0000000000000000
 s11: ffffaf803566c540 t3 : ffffffff87fb27e0 t4 : fffffffef22b225e
 t5 : fffffffef22b225f t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff8645596a>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff8645596a>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:178 [inline]
[<ffffffff8645596a>] _raw_spin_unlock_irqrestore+0x36/0xc0 kernel/locking/spinlock.c:194
[<ffffffff818aa804>] debug_object_deactivate+0x27c/0x2f0 lib/debugobjects.c:905
[<ffffffff80399f40>] debug_rcu_head_unqueue kernel/rcu/rcu.h:248 [inline]
[<ffffffff80399f40>] rcu_do_batch kernel/rcu/tree.c:2609 [inline]
[<ffffffff80399f40>] rcu_core+0x4e8/0x1314 kernel/rcu/tree.c:2869
[<ffffffff8039b138>] rcu_core_si+0xc/0x14 kernel/rcu/tree.c:2886
[<ffffffff8016a140>] handle_softirqs+0x454/0x13d4 kernel/softirq.c:622
[<ffffffff8016b4de>] __do_softirq kernel/softirq.c:656 [inline]
[<ffffffff8016b4de>] invoke_softirq kernel/softirq.c:496 [inline]
[<ffffffff8016b4de>] __irq_exit_rcu+0x2de/0x534 kernel/softirq.c:723
[<ffffffff8016c390>] irq_exit_rcu+0x10/0xf4 kernel/softirq.c:739
[<ffffffff8642d528>] handle_riscv_irq+0x40/0x4c arch/riscv/kernel/traps.c:446
[<ffffffff86459d9a>] call_on_irq_stack+0x32/0x40 arch/riscv/kernel/entry.S:396