INFO: task syz-execu
INFO: task syz-executor.0:4934 blocked for more than 143 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:4934  tgid:4934  ppid:1      task_flags:0x400140 flags:0x00000001
Call trace:
 __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1bec/0x2dcc kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0x140/0x218 kernel/sched/core.c:7283
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7340
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x4e4/0xef8 kernel/locking/mutex.c:820
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:873
 fuse_lock_inode+0xd4/0x128 fs/fuse/inode.c:607
 fuse_lookup+0x150/0x350 fs/fuse/dir.c:624
 __lookup_slow+0x264/0x38c fs/namei.c:1915
 lookup_slow+0x5c/0x80 fs/namei.c:1932
 walk_component fs/namei.c:2278 [inline]
 link_path_walk+0xaf8/0x150c fs/namei.c:2652
 path_openat+0x1d8/0x2a6c fs/namei.c:4854
 do_file_open+0x1c4/0x2e4 fs/namei.c:4887
 do_sys_openat2+0x114/0x1e8 fs/open.c:1364
 do_sys_open+0xac/0xdc fs/open.c:1370
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __arm64_sys_openat+0x9c/0xb8 fs/open.c:1381
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
INFO: task syz-executor.0:5048 blocked for more than 143 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:5048  tgid:5039  ppid:4934   task_flags:0x400140 flags:0x00800011
Call trace:
 __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1bec/0x2dcc kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0x140/0x218 kernel/sched/core.c:7283
 request_wait_answer fs/fuse/dev.c:590 [inline]
 __fuse_request_send fs/fuse/dev.c:604 [inline]
 __fuse_simple_request+0xaf0/0x1328 fs/fuse/dev.c:699
 fuse_simple_request fs/fuse/fuse_i.h:1262 [inline]
 fuse_lookup_name+0x214/0x64c fs/fuse/dir.c:578
 fuse_lookup+0x194/0x350 fs/fuse/dir.c:625
 __lookup_slow+0x264/0x38c fs/namei.c:1915
 lookup_slow+0x5c/0x80 fs/namei.c:1932
 walk_component fs/namei.c:2278 [inline]
 link_path_walk+0xaf8/0x150c fs/namei.c:2652
 path_openat+0x1d8/0x2a6c fs/namei.c:4854
 do_file_open+0x1c4/0x2e4 fs/namei.c:4887
 do_sys_openat2+0x114/0x1e8 fs/open.c:1364
 do_sys_open+0xac/0xdc fs/open.c:1370
 __do_sys_openat fs/open.c:1386 [inline]
 __se_sys_openat fs/open.c:1381 [inline]
 __arm64_sys_openat+0x9c/0xb8 fs/open.c:1381
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:740
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:759
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffff800088b672a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #0: ffff800088b672a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffff800088b672a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775
2 locks held by pr/ttyAMA-1/41:
2 locks held by getty/4489:
 #0: ffff0000cef950a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009232e2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211
2 locks held by syz-executor.0/4934:
 #0: ffff0000e25fcb80 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1044 [inline]
 #0: ffff0000e25fcb80 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: lookup_slow+0x4c/0x80 fs/namei.c:1931
 #1: ffff0000e25fcff8 (&fi->mutex){+.+.}-{4:4}, at: fuse_lock_inode+0xd4/0x128 fs/fuse/inode.c:607
2 locks held by syz-executor.0/5048:
 #0: ffff0000e25fcb80 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1044 [inline]
 #0: ffff0000e25fcb80 (&type->i_mutex_dir_key#8){++++}-{4:4}, at: lookup_slow+0x4c/0x80 fs/namei.c:1931
 #1: ffff0000e25fcff8 (&fi->mutex){+.+.}-{4:4}, at: fuse_lock_inode+0xd4/0x128 fs/fuse/inode.c:607

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