INFO: task syz.0.37:3982 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.0.37        state:D stack:0     pid:3982  tgid:3980  ppid:3245   task_flags:0x400140 flags:0x00000002
Call Trace:
[<ffffffff8649a9ee>] context_switch kernel/sched/core.c:5387 [inline]
[<ffffffff8649a9ee>] __schedule+0x1aae/0x4dec kernel/sched/core.c:7188
[<ffffffff8649dde0>] __schedule_loop kernel/sched/core.c:7267 [inline]
[<ffffffff8649dde0>] schedule+0xb4/0x334 kernel/sched/core.c:7282
[<ffffffff813474b4>] fuse_wait_aborted+0x17c/0x22c fs/fuse/dev.c:2535
[<ffffffff8136bdb2>] fuse_conn_destroy+0x82/0x248 fs/fuse/inode.c:2120
[<ffffffff8136d370>] fuse_sb_destroy fs/fuse/inode.c:2139 [inline]
[<ffffffff8136d370>] fuse_kill_sb_anon+0x238/0x2c8 fs/fuse/inode.c:2152
[<ffffffff80ccc10c>] deactivate_locked_super+0xd8/0x198 fs/super.c:476
[<ffffffff80ccfa70>] vfs_get_super fs/super.c:1338 [inline]
[<ffffffff80ccfa70>] get_tree_nodev+0x144/0x178 fs/super.c:1346
[<ffffffff8136fbd8>] fuse_get_tree+0x34c/0x418 fs/fuse/inode.c:2055
[<ffffffff80cc92e2>] vfs_get_tree+0x7e/0x314 fs/super.c:1754
[<ffffffff80d60f94>] fc_mount+0x1c/0x1d8 fs/namespace.c:1193
[<ffffffff80d75206>] do_new_mount_fc fs/namespace.c:3758 [inline]
[<ffffffff80d75206>] do_new_mount fs/namespace.c:3834 [inline]
[<ffffffff80d75206>] path_mount+0x6ae/0x1d14 fs/namespace.c:4154
[<ffffffff80d77d36>] do_mount fs/namespace.c:4167 [inline]
[<ffffffff80d77d36>] __do_sys_mount fs/namespace.c:4383 [inline]
[<ffffffff80d77d36>] __se_sys_mount fs/namespace.c:4360 [inline]
[<ffffffff80d77d36>] __riscv_sys_mount+0x5c2/0x778 fs/namespace.c:4360
[<ffffffff80078f0a>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff8648ebf0>] do_trap_ecall_u+0x3dc/0x61c arch/riscv/kernel/traps.c:342
[<ffffffff864b9f62>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232

Showing all locks held in the system:
2 locks held by kworker/0:0/9:
1 lock held by khungtaskd/32:
 #0: ffffffff887f4120 (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/3191:
 #0: ffffaf801de240a0 (&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 syz-executor/3244:
2 locks held by kworker/1:6/3870:
1 lock held by syz.0.37/3982:
 #0: ffffaf80310660d8 (&type->s_umount_key#50/1){+.+.}-{4:4}, at: alloc_super+0x206/0xc18 fs/super.c:345
3 locks held by syz-executor/4002:
3 locks held by kworker/u8:7/4142:

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

NMI backtrace for cpu 1
CPU: 1 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
[<ffffffff8644f1c6>] nmi_cpu_backtrace+0x25e/0x3b0 lib/nmi_backtrace.c:113
[<ffffffff8644f5b6>] nmi_trigger_cpumask_backtrace+0x29e/0x460 lib/nmi_backtrace.c:62
[<ffffffff80089c60>] arch_trigger_cpumask_backtrace+0x2c/0x40 arch/riscv/kernel/smp.c:350
[<ffffffff86463c10>] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
[<ffffffff86463c10>] __sys_info lib/sys_info.c:157 [inline]
[<ffffffff86463c10>] sys_info+0x20c/0x254 lib/sys_info.c:165
[<ffffffff80534844>] check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
[<ffffffff80534844>] watchdog+0xa3c/0x12dc kernel/hung_task.c:561
[<ffffffff801f11d0>] kthread+0x31c/0x444 kernel/kthread.c:436
[<ffffffff8006a124>] ret_from_fork_kernel+0x94/0xef8 arch/riscv/kernel/process.c:230
[<ffffffff864ba092>] 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: 3022 Comm: syslogd Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: riscv-virtio,qemu (DT)
epc : preempt_schedule_irq+0x6a/0x1c8 kernel/sched/core.c:7512
 ra : preempt_schedule_irq+0x66/0x1c8 kernel/sched/core.c:7511
epc : ffffffff8649e766 ra : ffffffff8649e762 sp : ffff8f8004207690
 gp : ffffffff8a24a9a0 tp : ffffaf801c9db580 t0 : ffffaf8072c692d0
 t1 : ffffffff8007bc80 t2 : ffffaf8072c696a8 s0 : ffff8f80042076c0
 s1 : dfffffff00000000 a0 : 0000000000000000 a1 : ffffffff881d75f0
 a2 : 0000000000000006 a3 : 0000000000000001 a4 : 0000000000001000
 a5 : 000000000001342f a6 : 0000000000000003 a7 : 0000000041b58ab3
 s2 : 0000000000000000 s3 : 0000000000000000 s4 : ffffffff8648f2d4
 s5 : ffffaf801c9db580 s6 : ffffffffffffffff s7 : ffffffff86868788
 s8 : ffffffff91623ec0 s9 : 0000000000000002 s10: ffffaf801c2ee358
 s11: fffffffef0d687c4 t3 : ffffffff88060bc0 t4 : fffff5ef0e58d250
 t5 : fffff5ef0e58d251 t6 : 0000000000000002 ssp : 0000000000000000
status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000001
[<ffffffff8649e766>] arch_local_irq_enable arch/riscv/include/asm/irqflags.h:21 [inline]
[<ffffffff8649e766>] preempt_schedule_irq+0x6a/0x1c8 kernel/sched/core.c:7511
[<ffffffff86490714>] raw_irqentry_exit_cond_resched kernel/entry/common.c:142 [inline]
[<ffffffff86490714>] raw_irqentry_exit_cond_resched kernel/entry/common.c:134 [inline]
[<ffffffff86490714>] irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:476 [inline]
[<ffffffff86490714>] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:547 [inline]
[<ffffffff86490714>] irqentry_exit+0x628/0xd78 kernel/entry/common.c:164
[<ffffffff8648f2d4>] do_irq+0x34/0x4c arch/riscv/kernel/traps.c:444
[<ffffffff864b9f40>] handle_exception+0x13c/0x16a arch/riscv/kernel/entry.S:221
[<ffffffff8648fd1c>] arch_local_irq_restore arch/riscv/include/asm/irqflags.h:51 [inline]
[<ffffffff8648fd1c>] lock_is_held_type+0x140/0x1f8 kernel/locking/lockdep.c:5942
[<ffffffff8021b7aa>] lock_is_held include/linux/lockdep.h:249 [inline]
[<ffffffff8021b7aa>] __might_resched+0x23a/0x5b4 kernel/sched/core.c:9124
[<ffffffff808c2eee>] generic_perform_write+0x4ae/0x944 mm/filemap.c:4353
[<ffffffff80974aa4>] shmem_file_write_iter+0x110/0x138 mm/shmem.c:3478
[<ffffffff80cbfcac>] new_sync_write fs/read_write.c:595 [inline]
[<ffffffff80cbfcac>] vfs_write+0x648/0xc78 fs/read_write.c:688
[<ffffffff80cc06ce>] ksys_write+0x126/0x238 fs/read_write.c:740
[<ffffffff80cc084e>] __do_sys_write fs/read_write.c:751 [inline]
[<ffffffff80cc084e>] __se_sys_write fs/read_write.c:748 [inline]
[<ffffffff80cc084e>] __riscv_sys_write+0x6e/0x94 fs/read_write.c:748
[<ffffffff80078f0a>] syscall_handler+0x92/0x114 arch/riscv/include/asm/syscall.h:112
[<ffffffff8648ebf0>] do_trap_ecall_u+0x3dc/0x61c arch/riscv/kernel/traps.c:342
[<ffffffff864b9f62>] handle_exception+0x15e/0x16a arch/riscv/kernel/entry.S:232