INFO: task syz.1.210:4493 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.1.210       state:D stack:0     pid:4493  tgid:4490  ppid:3260   task_flags:0x400140 flags:0x00000002
Call Trace:
[<ffffffff8648bc06>] context_switch kernel/sched/core.c:5387 [inline]
[<ffffffff8648bc06>] __schedule+0x1aae/0x4dec kernel/sched/core.c:7188
[<ffffffff8648eff8>] __schedule_loop kernel/sched/core.c:7267 [inline]
[<ffffffff8648eff8>] schedule+0xb4/0x334 kernel/sched/core.c:7282
[<ffffffff8133d610>] fuse_wait_aborted+0x17c/0x22c fs/fuse/dev.c:2535
[<ffffffff81361f0e>] fuse_conn_destroy+0x82/0x248 fs/fuse/inode.c:2120
[<ffffffff813634cc>] fuse_sb_destroy fs/fuse/inode.c:2139 [inline]
[<ffffffff813634cc>] fuse_kill_sb_anon+0x238/0x2c8 fs/fuse/inode.c:2152
[<ffffffff80cc6af0>] deactivate_locked_super+0xd8/0x198 fs/super.c:476
[<ffffffff80cca350>] vfs_get_super fs/super.c:1338 [inline]
[<ffffffff80cca350>] get_tree_nodev+0x144/0x178 fs/super.c:1346
[<ffffffff813659e0>] fuse_get_tree+0x34c/0x418 fs/fuse/inode.c:2055
[<ffffffff80cc3e1e>] vfs_get_tree+0x7e/0x314 fs/super.c:1754
[<ffffffff80d5aaa4>] fc_mount+0x1c/0x1d8 fs/namespace.c:1193
[<ffffffff80d6e5b6>] do_new_mount_fc fs/namespace.c:3758 [inline]
[<ffffffff80d6e5b6>] do_new_mount fs/namespace.c:3834 [inline]
[<ffffffff80d6e5b6>] path_mount+0x6ae/0x1d14 fs/namespace.c:4154
[<ffffffff80d70fea>] do_mount fs/namespace.c:4167 [inline]
[<ffffffff80d70fea>] __do_sys_mount fs/namespace.c:4383 [inline]
[<ffffffff80d70fea>] __se_sys_mount fs/namespace.c:4360 [inline]
[<ffffffff80d70fea>] __riscv_sys_mount+0x5c2/0x778 fs/namespace.c:4360
[<ffffffff80078f0a>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff8647fe08>] do_trap_ecall_u+0x3dc/0x61c arch/riscv/kernel/traps.c:342
[<ffffffff864ab17a>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffffffff887f34e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2a/0x1a8 kernel/locking/lockdep.c:6771
1 lock held by syslogd/3022:
2 locks held by getty/3194:
 #0: ffffaf801bb490a0 (&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
2 locks held by syz-executor/3246:
1 lock held by syz-executor/3259:
4 locks held by kworker/u8:8/3872:
1 lock held by syz.1.210/4493:
 #0: ffffaf803245c0d8 (&type->s_umount_key#55/1){+.+.}-{4:4}, at: alloc_super+0x18a/0xb14 fs/super.c:345
2 locks held by kworker/1:4/4509:
1 lock held by syz-executor/4513:
 #0: ffffaf8072c9f8e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:652 [inline]
 #0: ffffaf8072c9f8e0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1624 [inline]
 #0: ffffaf8072c9f8e0 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1968 [inline]
 #0: ffffaf8072c9f8e0 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x308/0x4dec kernel/sched/core.c:7063
3 locks held by kworker/u8:10/4860:
3 locks held by syz.2.227/4862:
3 locks held by syz.2.227/4864:

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

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:
[<ffffffff8007c6da>] dump_backtrace+0x2e/0x3c arch/riscv/kernel/stacktrace.c:149
[<ffffffff80003284>] show_stack+0x30/0x3c arch/riscv/kernel/stacktrace.c:155
[<ffffffff80060a24>] __dump_stack lib/dump_stack.c:94 [inline]
[<ffffffff80060a24>] dump_stack_lvl+0x114/0x1ac lib/dump_stack.c:120
[<ffffffff80060ad8>] dump_stack+0x1c/0x28 lib/dump_stack.c:129
[<ffffffff864403de>] nmi_cpu_backtrace+0x25e/0x3b0 lib/nmi_backtrace.c:113
[<ffffffff864407ce>] nmi_trigger_cpumask_backtrace+0x29e/0x460 lib/nmi_backtrace.c:62
[<ffffffff80089c60>] arch_trigger_cpumask_backtrace+0x2c/0x40 arch/riscv/kernel/smp.c:350
[<ffffffff86454e28>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff86454e28>] __sys_info lib/sys_info.c:157 [inline]
[<ffffffff86454e28>] sys_info+0x20c/0x254 lib/sys_info.c:165
[<ffffffff8052f850>] check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
[<ffffffff8052f850>] watchdog+0xa3c/0x12dc kernel/hung_task.c:561
[<ffffffff801f0e5c>] kthread+0x31c/0x444 kernel/kthread.c:436
[<ffffffff8006a124>] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:230
[<ffffffff864ab2aa>] 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: 4329 Comm: kworker/1:1 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: riscv-virtio,qemu (DT)
Workqueue: events_power_efficient gc_worker
epc : finish_task_switch.isra.0+0x214/0xa6c kernel/sched/core.c:5244
 ra : raw_spin_rq_unlock_irq kernel/sched/sched.h:1644 [inline]
 ra : finish_lock_switch kernel/sched/core.c:5124 [inline]
 ra : finish_task_switch.isra.0+0x210/0xa6c kernel/sched/core.c:5242
epc : ffffffff80227ac8 ra : ffffffff80227ac4 sp : ffff8f800aab7360
 gp : ffffffff8a2425a0 tp : ffffaf801cb50000 t0 : 1ffffffff22c37d9
 t1 : ffffffff8007bc80 t2 : ffffffff9161bec8 s0 : ffff8f800aab73e0
 s1 : ffffaf8072c9f880 a0 : 0000000000000001 a1 : ffffffff881ce830
 a2 : 0000000000000007 a3 : 0000000000000001 a4 : 0000000000001000
 a5 : 0000000000053313 a6 : 0000000000000003 a7 : 0000000041b58ab3
 s2 : ffffaf8072ca0600 s3 : ffffaf8013281ac0 s4 : 0000000000000000
 s5 : 0000000000000000 s6 : 0000000000000000 s7 : 1ffff5f00e5940c0
 s8 : 1ffff5f00e594079 s9 : 0000000000000000 s10: ffffffff80000000
 s11: ffffaf8013281ac0 t3 : ffffffff88057eb8 t4 : fffff5ef0e593f19
 t5 : fffff5ef0e593f1a t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff80227ac8>] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline]
[<ffffffff80227ac8>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1644 [inline]
[<ffffffff80227ac8>] finish_lock_switch kernel/sched/core.c:5124 [inline]
[<ffffffff80227ac8>] finish_task_switch.isra.0+0x214/0xa6c kernel/sched/core.c:5242
[<ffffffff8648bc0e>] context_switch kernel/sched/core.c:5390 [inline]
[<ffffffff8648bc0e>] __schedule+0x1ab6/0x4dec kernel/sched/core.c:7188
[<ffffffff8648f984>] preempt_schedule_irq+0x70/0x1c8 kernel/sched/core.c:7512
[<ffffffff8648192c>] raw_irqentry_exit_cond_resched kernel/entry/common.c:142 [inline]
[<ffffffff8648192c>] raw_irqentry_exit_cond_resched kernel/entry/common.c:134 [inline]
[<ffffffff8648192c>] irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
[<ffffffff8648192c>] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
[<ffffffff8648192c>] irqentry_exit+0x628/0xd78 kernel/entry/common.c:164
[<ffffffff864804ec>] do_irq+0x34/0x4c arch/riscv/kernel/traps.c:444
[<ffffffff864ab158>] handle_exception+0x13c/0x16a arch/riscv/kernel/entry.S:221
[<ffffffff802f3cde>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff802f3cde>] lock_acquire kernel/locking/lockdep.c:5871 [inline]
[<ffffffff802f3cde>] lock_acquire+0x286/0x500 kernel/locking/lockdep.c:5825
[<ffffffff856ac462>] rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
[<ffffffff856ac462>] rcu_read_lock include/linux/rcupdate.h:838 [inline]
[<ffffffff856ac462>] gc_worker+0x236/0x1504 net/netfilter/nf_conntrack_core.c:1543
[<ffffffff801cdce4>] process_one_work+0x974/0x20e0 kernel/workqueue.c:3302
[<ffffffff801d1334>] process_scheduled_works kernel/workqueue.c:3385 [inline]
[<ffffffff801d1334>] worker_thread+0x540/0xcbc kernel/workqueue.c:3466
[<ffffffff801f0e5c>] kthread+0x31c/0x444 kernel/kthread.c:436
[<ffffffff8006a124>] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:230
[<ffffffff864ab2aa>] ret_from_fork_kernel_asm+0x16/0x18 arch/riscv/kernel/entry.S:363