INFO: task syz-executor.0:3512 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:0     pid:3512  tgid:3512  ppid:1      task_flags:0x400140 flags:0x00000009
task:syz-executor.0  state:D stack:0     pid:3512  tgid:3512  ppid:1      task_flags:0x400140 flags:0x00000009
Call trace:
 __switch_to+0x208/0x4ec arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0xd58/0x3180 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xd0/0x344 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x72c/0xffc kernel/locking/mutex.c:760
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:812
 fuse_lock_inode+0xa0/0xd8 fs/fuse/inode.c:594
 fuse_lookup+0x148/0x394 fs/fuse/dir.c:427
 __lookup_slow+0x1a0/0x310 fs/namei.c:1808
 lookup_slow fs/namei.c:1825 [inline]
 walk_component+0x1f0/0x484 fs/namei.c:2129
 link_path_walk+0x404/0xae0 fs/namei.c:2497
 path_openat+0x16c/0x24b4 fs/namei.c:4042
 do_filp_open+0x184/0x360 fs/namei.c:4073
 do_sys_openat2+0xe0/0x160 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __arm64_sys_openat+0x12c/0x1bc fs/open.c:1461
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x50/0x1a0 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
INFO: task syz-executor.0:3631 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:0     pid:3631  tgid:3626  ppid:3512   task_flags:0x400140 flags:0x00000019
Call trace:
 __switch_to+0x208/0x4ec arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0xd58/0x3180 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xd0/0x344 kernel/sched/core.c:7058
 request_wait_answer+0x300/0x4ac fs/fuse/dev.c:565
 __fuse_request_send fs/fuse/dev.c:579 [inline]
 __fuse_simple_request+0x1e8/0x97c fs/fuse/dev.c:673
 fuse_simple_request fs/fuse/fuse_i.h:1244 [inline]
 fuse_lookup_name+0x214/0x630 fs/fuse/dir.c:381
 fuse_lookup+0x190/0x394 fs/fuse/dir.c:428
 __lookup_slow+0x1a0/0x310 fs/namei.c:1808
 lookup_slow fs/namei.c:1825 [inline]
 walk_component+0x1f0/0x484 fs/namei.c:2129
 link_path_walk+0x404/0xae0 fs/namei.c:2497
 path_openat+0x16c/0x24b4 fs/namei.c:4042
 do_filp_open+0x184/0x360 fs/namei.c:4073
 do_sys_openat2+0xe0/0x160 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __arm64_sys_openat+0x12c/0x1bc fs/open.c:1461
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x6c/0x258 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x40/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x50/0x1a0 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Showing all locks held in the system:
3 locks held by pr/ttyAMA-1/31:
1 lock held by khungtaskd/32:
 #0: ffff800087320220 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6769
2 locks held by getty/3259:
 #0: ffff0000172720a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80008d5fb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e8/0xdc0 drivers/tty/n_tty.c:2222
2 locks held by syz-executor.0/3512:
 #0: ffff000020148148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:885 [inline]
 #0: ffff000020148148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: lookup_slow fs/namei.c:1824 [inline]
 #0: ffff000020148148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: walk_component+0x1e0/0x484 fs/namei.c:2129
 #1: ffff000020148608 (&fi->mutex){+.+.}-{4:4}, at: fuse_lock_inode+0xa0/0xd8 fs/fuse/inode.c:594
2 locks held by syz-executor.0/3631:
 #0: ffff000020148148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:885 [inline]
 #0: ffff000020148148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: lookup_slow fs/namei.c:1824 [inline]
 #0: ffff000020148148 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: walk_component+0x1e0/0x484 fs/namei.c:2129
 #1: ffff000020148608 (&fi->mutex){+.+.}-{4:4}, at: fuse_lock_inode+0xa0/0xd8 fs/fuse/inode.c:594

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